修正左连接题目错误；代码排版

data/1.MySQL初阶/2.安装和登录/2.登录/prepare.md

@@ -25,8 +25,13 @@ mysql mysql
 ```
 创建数据库用户 joe 并授权：
 ```sql
-create user 'joe'@'localhost' identified by 'joe';
-grant all privileges on *.* to `joe`@`localhost`;
+create user 
+    'joe'@'localhost' 
+        identified by 'joe';
+
+grant all privileges 
+    on *.* to `joe`@`localhost`;
+
 flush privileges ;
 ```
 
@@ -41,7 +46,9 @@ mysql mysql
 ```
 为 joe 授权
 ```sql
-grant all privileges on *.* to joe;
+grant all 
+    privileges on *.* to joe;
+
 flush privileges ;
 ```
 
@@ -55,7 +62,9 @@ mysql mysql
 
 为 joe 授权
 ```sql
-grant all privileges on *.* to joe;
+grant all 
+    privileges on *.* to joe;
+
 flush privileges ;
 ```
 
@@ -68,7 +77,10 @@ mysql mysql
 
 创建数据库用户 joe
 ```sql
-create user 'joe'@'localhost' identified by 'joe';
+create user 
+    'joe'@'localhost' 
+        identified by 'joe';
+
 flush privileges ;
 ```
 
@@ -81,7 +93,12 @@ mysql mysql
 ```
 创建数据库用户 joe 并授权：
 ```sql
-create user 'joe'@'%' identified by 'joe';
-grant all privileges on *.* to joe;
+create user 
+    'joe'@'%' 
+        identified by 'joe';
+
+grant all 
+    privileges on *.* to joe;
+
 flush privileges ;
 ```

data/1.MySQL初阶/5.数据修改/1.插入/config.json

 {
   "node_id": "mysql-fcca525ab0f04f16834ded9b2b3f38a4",
-  "keywords": ["insert", "插入"],
+  "keywords": [
+    "insert",
+    "插入"
+  ],
   "children": [],
   "export": [
     "insert.json"
   ],
   "keywords_must": [
-    ["mysql", "插入"]
+    [
+      "mysql",
+      "插入"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/1.MySQL初阶/5.数据修改/1.插入/insert.md

@@ -26,8 +26,24 @@ create unique index idx_book_isbn on book(isbn);
 ## 答案
 
 ```sql
-insert into book(title, price, isbn, publish_at) select 'a book title', 25.4, 'xx-xxxx-xxxx', '2019-12-1';
-insert into book(title, price, isbn, publish_at) select 'a other book title', 25.4, 'yy-yyyy-xxxx', '2019-12-1'; 
+insert into book(
+                 title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a book title', 
+           25.4, 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
+
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a other book title', 
+           25.4, 
+           'yy-yyyy-xxxx', 
+           '2019-12-1'; 
 ```
 
 ## 选项
@@ -35,27 +51,83 @@ insert into book(title, price, isbn, publish_at) select 'a other book title', 25
 ### 唯一键冲突
 
 ```sql
-insert into book(title, price, isbn, publish_at) select 'a book title', 25.4, 'xx-xxxx-xxxx', '2019-12-1';
-insert into book(title, price, isbn, publish_at) select 'a other book title', 35.4, 'xx-xxxx-xxxx', '2019-12-1'; 
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a book title', 
+           25.4, 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
+
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a other book title', 
+           35.4, 
+           'xx-xxxx-xxxx', 
+           '2019-12-1'; 
 ```
 
 ### 缺少必要的列
 
 ```sql
-insert into book(price, isbn, publish_at) select 25.4, 'xx-xxxx-xxxx', '2019-12-1';
-insert into book(price, isbn, publish_at) select 35.4, 'yy-yyyy-xxxx', '2019-12-1';
+insert into book(price, 
+                 isbn, 
+                 publish_at) 
+    select 25.4, 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
+
+insert into book(price, 
+                 isbn, 
+                 publish_at) 
+    select 35.4, 
+           'yy-yyyy-xxxx', 
+           '2019-12-1';
 ```
 
 ### 类型错误
 
 ```sql
-insert into book(title, price, isbn, publish_at) select 'a book title', 'unknown', 'xx-xxxx-xxxx', '2019-12-1';
-insert into book(title, price, isbn, publish_at) select 'a other book title', 'unknown', 'xx-xxxx-xxxx', '2019-12-1';
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a book title', 
+           'unknown', 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
+
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select 'a other book title', 
+           'unknown', 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
 ```
 
 ### 违反非空约束
 
 ```sql
-insert into book(title, price, isbn, publish_at) select null, 'unknown', 'xx-xxxx-xxxx', '2019-12-1';
-insert into book(title, price, isbn, publish_at) select null, 'unknown', 'xx-xxxx-xxxx', '2019-12-1';
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select null, 
+           'unknown', 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
+
+insert into book(title, 
+                 price, 
+                 isbn, 
+                 publish_at) 
+    select null, 
+           'unknown', 
+           'xx-xxxx-xxxx', 
+           '2019-12-1';
 ```

data/1.MySQL初阶/5.数据修改/2.修改/update.md

@@ -24,7 +24,9 @@ Joe 希望修改销售部(dept 字段为 sale)员工 Dora Muk 的工资，将其
 ## 答案
 
 ```sql
-update employee set salary = salary + 1000 where dept = 'sale' and name = 'Dora Muk';
+update employee set 
+    salary = salary + 1000 
+where dept = 'sale' and name = 'Dora Muk';
 ```
 
 ## 选项
@@ -32,19 +34,23 @@ update employee set salary = salary + 1000 where dept = 'sale' and name = 'Dora
 ### 过滤条件不严谨
 
 ```sql
-update employee set salary = salary + 1000 where name = 'Dora Muk';
+update employee set 
+    salary = salary + 1000 
+where name = 'Dora Muk';
 ```
 
 
 ### 缺少过滤条件
 
 ```sql
-update employee set salary = salary + 1000;
+update employee set 
+    salary = salary + 1000;
 ```
 
 ### 错误的赋值语句
 
 ```sql
-update employee set salary += 1000;
+update employee set 
+    salary += 1000;
 ```
 

data/1.MySQL初阶/5.数据修改/3.删除/delete.md

@@ -4,14 +4,14 @@
 
 ```sql
 create table orders (
-                        id int primary key auto_increment,
-                        item_id int,
-                        amount int,
-                        unit_price decimal(12, 4),
-                        price decimal(12, 4),
-                        description varchar(2000),
-                        ts timestamp default now(),
-                        deal bool default false
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    price decimal(12, 4),
+    description varchar(2000),
+    ts timestamp default now(),
+    deal bool default false
 );
 ```
 
@@ -60,14 +60,14 @@ from orders;
 ```sql
 drop table orders;
 create table if not exists orders (
-                        id int primary key auto_increment,
-                        item_id int,
-                        amount int,
-                        unit_price decimal(12, 4),
-                        price decimal(12, 4),
-                        description varchar(2000),
-                        ts timestamp default now(),
-                        deal bool default false
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    price decimal(12, 4),
+    description varchar(2000),
+    ts timestamp default now(),
+    deal bool default false
 );
 ```
 

data/1.MySQL初阶/6.数据查询/1.SELECT/config.json

 {
   "node_id": "mysql-f5527eae7f3148108c92ff99a6d4ed4a",
-  "keywords": ["查询", "select"],
+  "keywords": [
+    "查询",
+    "select"
+  ],
   "children": [],
   "export": [
     "select.json"
   ],
   "keywords_must": [
-    ["mysql", "select"]
+    [
+      "mysql",
+      "select"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/1.MySQL初阶/6.数据查询/1.SELECT/select.md

@@ -39,7 +39,9 @@ select * from employee where dept = 'hr';
 ### D
 
 ```sql
-select id, name, dept, salary from employee where salary > 10000;
+select id, name, dept, salary 
+from employee 
+where salary > 10000;
 ```
 
 ### E

data/1.MySQL初阶/6.数据查询/2.WHERE/config.json

 {
   "node_id": "mysql-91cc9c73e58945d3ba654370a057a1c7",
-  "keywords": ["查询", "select", "where"],
+  "keywords": [
+    "查询",
+    "select",
+    "where"
+  ],
   "children": [],
   "export": [
     "where.json"
   ],
   "keywords_must": [
-    ["mysql", "where"]
+    [
+      "mysql",
+      "where"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/1.MySQL初阶/6.数据查询/2.WHERE/where.md

@@ -40,7 +40,9 @@ where date(ts) = '2022-05-25'
 
 ```sql
 select id
-from (select * from orders where date(ts) = '2022-05-25') as o
+from (select * 
+      from orders 
+      where date(ts) = '2022-05-25') as o
 where unit_prise < 20;
 ```
 
@@ -58,7 +60,8 @@ where date(ts) = '2022-05-25'
 ```sql
 select id
 from orders 
-if date(ts) = '2022-05-25' or unit_prise < 20;
+if date(ts) = '2022-05-25' 
+    or unit_prise < 20;
 ```
 
 ### D

data/1.MySQL初阶/6.数据查询/3.运算符/config.json

@@ -9,7 +9,10 @@
     "geo.json"
   ],
   "keywords_must": [
-    ["mysql", "运算符"]
+    [
+      "mysql",
+      "运算符"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/1.MySQL初阶/6.数据查询/3.运算符/geo.md

@@ -22,7 +22,8 @@ create table points(
 ## 答案
 
 ```sql
-select id, sqrt(x^2 + y^2) from points;
+select id, sqrt(x^2 + y^2) 
+from points;
 ```
 
 ## 选项
@@ -30,23 +31,30 @@ select id, sqrt(x^2 + y^2) from points;
 ### A
 
 ```sql
-select sqrt(vx+vy) from (select x^2 as vx, y^2 as vy from points) as t;
+select sqrt(vx+vy) 
+from (
+    select x^2 as vx, y^2 as vy 
+    from points) as t;
 ```
 
 ### B
 
 ```sql
-select sqrt(vx + vy) from points where x^2 as vx, y^2 as vy ;
+select sqrt(vx + vy) 
+from points 
+where x^2 as vx, y^2 as vy ;
 ```
 
 ### C
 
 ```sql
-select id + sqrt(x^2 + y^2) from points;
+select id + sqrt(x^2 + y^2) 
+from points;
 ```
 
 ### D
 
 ```sql
-select id || sqrt(x^2 + y^2) from points;
+select id || sqrt(x^2 + y^2) 
+from points;
 ```
\ No newline at end of file

data/2.MySQL中阶/1.数据库组成/3.存储过程和函数/create_procedure.md

@@ -14,7 +14,10 @@ Joe 希望这个计算更紧凑一些，在已经有 individual_income_tax 的
 ## 答案
 
 ```sql
-create procedure sp_idt(in salary decimal(12, 4), out tax decimal(12, 4), out take_home decimal(12, 4)) 
+create procedure sp_idt(
+    in salary decimal(12, 4), 
+    out tax decimal(12, 4), 
+    out take_home decimal(12, 4)) 
 begin 
     set tax = individual_income_tax(salary);
     set take_home = salary - tax;
@@ -26,7 +29,9 @@ end;
 ### A
 
 ```sql
-create procedure sp_idt(salary decimal(12, 4)) returns (tax decimal(12, 4), take_home decimal(12, 4))
+create procedure sp_idt(salary decimal(12, 4)) 
+    returns (tax decimal(12, 4), 
+        take_home decimal(12, 4))
 begin 
     set tax = individual_income_tax(salary);
     set take_home = salary - tax;
@@ -37,7 +42,8 @@ end;
 
 
 ```sql
-create procedure sp_idt(salary decimal(12, 4)) returns (decimal(12, 4), decimal(12, 4))
+create procedure sp_idt(salary decimal(12, 4)) 
+    returns (decimal(12, 4), decimal(12, 4))
 begin 
     declare tax, take_home decimal(12, 4);
     set tax = individual_income_tax(salary);

data/2.MySQL中阶/1.数据库组成/5. 触发器/audit.md

@@ -45,13 +45,44 @@ create table orders_log
 ## 答案
 
 ```sql
-create trigger in_orders after insert on orders
-    for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-    values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
-
-create trigger out_orders after delete on orders
-    for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-                 values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
+create trigger in_orders 
+        after insert on orders
+    for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+    values(NEW.id, 
+           NEW.item_id, 
+           NEW.amount, 
+           NEW.unit_price, 
+           NEW.total, 
+           NEW.description, 
+           NEW.ts, 'in');
+
+create trigger out_orders 
+        after delete on orders
+    for each row insert into orders_log(
+        id, 
+        item_id, 
+        amount, 
+        unit_price, 
+        total, 
+        description, 
+        ts, 
+        direction)
+    values(OLD.id, 
+           OLD.item_id, 
+           OLD.amount, 
+           OLD.unit_price, 
+           OLD.total, 
+           OLD.description, 
+           OLD.ts, 
+           'out');
 ```
 
 ## 选项
@@ -60,8 +91,23 @@ create trigger out_orders after delete on orders
 
 ```sql
 create trigger in_orders after insert on orders
-    for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-    values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
+    for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+    values(NEW.id, 
+           NEW.item_id, 
+           NEW.amount, 
+           NEW.unit_price, 
+           NEW.total, 
+           NEW.description, 
+           NEW.ts, 
+           'in');
 
 ```
 
@@ -70,8 +116,23 @@ create trigger in_orders after insert on orders
 ```sql
 
 create trigger out_orders after delete on orders
-    for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-                 values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
+    for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+         values(OLD.id, 
+                OLD.item_id, 
+                OLD.amount, 
+                OLD.unit_price, 
+                OLD.total, 
+                OLD.description, 
+                OLD.ts, 
+                'out');
 ```
 
 
@@ -79,17 +140,63 @@ create trigger out_orders after delete on orders
 
 ```sql
 create trigger in_orders after insert on orders
-        for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-        values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
+        for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+        values(NEW.id, 
+               NEW.item_id, 
+               NEW.amount, 
+               NEW.unit_price, 
+               NEW.total, 
+               NEW.description, 
+               NEW.ts, 
+               'in');
+
     after delete on orders
-        for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-                     values(OLD.id, OLD.item_id, OLD.amount, OLD.unit_price, OLD.total, OLD.description, OLD.ts, 'out');
+        for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+     values(OLD.id, 
+            OLD.item_id, 
+            OLD.amount, 
+            OLD.unit_price, 
+            OLD.total, 
+            OLD.description, 
+            OLD.ts, 
+            'out');
 ```
 
 ### D
 
 ```sql
 create trigger in_orders after insert, after delete on orders
-    for each row insert into orders_log(id, item_id, amount, unit_price, total, description, ts, direction)
-    values(NEW.id, NEW.item_id, NEW.amount, NEW.unit_price, NEW.total, NEW.description, NEW.ts, 'in');
+    for each row insert into orders_log(
+            id, 
+            item_id, 
+            amount, 
+            unit_price, 
+            total, 
+            description, 
+            ts, 
+            direction)
+    values(NEW.id, 
+           NEW.item_id, 
+           NEW.amount, 
+           NEW.unit_price, 
+           NEW.total, 
+           NEW.description, 
+           NEW.ts, 
+           'in');
 ```
\ No newline at end of file

data/2.MySQL中阶/11.用户和权限/1.创建普通用户/create_user.md

@@ -13,8 +13,11 @@ Joe 要给数据组的 John 创建一个用户，他希望John 能够从 `192.16
 ## 答案
 
 ```sql
-create user 'john'@'192.168.7.42' identified by 'goods123' password expire;
+create user 'john'@'192.168.7.42' 
+    identified by 'goods123' password expire;
+
 grant select on goods.* to 'john'@'192.168.7.42';
+
 flush privileges;
 ```
 
@@ -23,22 +26,31 @@ flush privileges;
 ### A
 
 ```sql
-create user 'john'@'192.168.7.42' identified by 'goods123';
+create user 'john'@'192.168.7.42' 
+    identified by 'goods123';
+
 grant select on goods.* to 'john'@'192.168.7.42';
+
 flush privileges;
 ```
 
 ### B
 
 ```sql
-create user 'john'@'192.168.7.42' identified by 'goods123';
-grant usage on goods.* to 'john'@'192.168.7.42';
+create user 'john'@'192.168.7.42' 
+    identified by 'goods123';
+
+grant usage on 
+    goods.* to 'john'@'192.168.7.42';
+
 flush privileges;
 ```
 
 ### C
 
 ```sql
-create user 'john'@'192.168.7.42' identified by 'goods123' on database goods;
+create user 'john'@'192.168.7.42' 
+    identified by 'goods123' on database goods;
+
 flush privileges;
 ```
\ No newline at end of file

data/2.MySQL中阶/11.用户和权限/1.创建普通用户/create_user_desc.md

@@ -22,31 +22,21 @@ IDENTIFIED BY '@Binghe123456';
 
 ### A
 
-```
 可以使用GRANT来创建用户
-```
 
 ### B
 
-```
 可以使用CREATE USER语句来创建用户
-```
 
 ### C
 
-```
 CREATE USER 'binghe'@'localhost';
 创建用户名为binghe的MySQL用户，其主机名为localhost。
-```
 
 ### D
 
-```
 使用GRANT语句创建用户，不仅可以添加用户，而且还能为用户赋予相应的权限。
-```
 
 ### E
 
-```
 使用CREATE USER语句创建用户时，只是在mysql数据库下的user数据表中添加了一条记录，并没有为用户授权。
-```
\ No newline at end of file

data/2.MySQL中阶/11.用户和权限/7.限制用户使用资源/limit_action.md

@@ -12,7 +12,8 @@ Joe 需要限制数据分析组（role analysis）的用户, 每小时查询次
 ## 答案
 
 ```sql
-alter user analysis with MAX_QUERIES_PER_HOUR 10000;
+alter user analysis 
+    with MAX_QUERIES_PER_HOUR 10000;
 ```
 
 ## 选项
@@ -20,24 +21,28 @@ alter user analysis with MAX_QUERIES_PER_HOUR 10000;
 ### A
 
 ```sql
-set user analysis with MAX_QUERIES_PER_HOUR 10000;
+set user analysis 
+    with MAX_QUERIES_PER_HOUR 10000;
 ```
 
 
 ### B
 
 ```sql
-alter role analysis with MAX_QUERIES_PER_HOUR 10000;
+alter role analysis 
+    with MAX_QUERIES_PER_HOUR 10000;
 ```
 
 ### C
 
 ```sql
-alter role analysis with MAX_QUERIES_PER_HOUR=10000;
+alter role analysis 
+    with MAX_QUERIES_PER_HOUR=10000;
 ```
 
 ### D
 
 ```sql
-alter user analysis set MAX_QUERIES_PER_HOUR 10000;
+alter user analysis 
+    set MAX_QUERIES_PER_HOUR 10000;
 ```

data/2.MySQL中阶/2.查询进阶/2. BETWEEN/between.md

@@ -24,7 +24,10 @@ create table goods(
 ## 答案
 
 ```sql
-SELECT * FROM goods HAVING price BETWEEN 1000 AND 2000;
+SELECT * 
+FROM goods 
+HAVING price 
+    BETWEEN 1000 AND 2000;
 ```
 
 
@@ -33,18 +36,25 @@ SELECT * FROM goods HAVING price BETWEEN 1000 AND 2000;
 ### A
 
 ```sql
-SELECT * FROM goods WHERE price BETWEEN 1000 AND 2000;
+SELECT * 
+FROM goods 
+WHERE price 
+    BETWEEN 1000 AND 2000;
 ```
 
 ### B
 
 ```sql
-SELECT * FROM goods WHERE price >= 1000 AND price <= 2000;
+SELECT * 
+FROM goods 
+WHERE price >= 1000 AND price <= 2000;
 ```
 
 ### C
 
 ```sql
-SELECT * FROM goods WHERE not (price < 1000 or price > 2000);
+SELECT * 
+FROM goods 
+WHERE not (price < 1000 or price > 2000);
 ```
 

data/2.MySQL中阶/2.查询进阶/2. BETWEEN/config.json

 {
   "node_id": "mysql-2296dbe96d584a52bd28a3ad5f655518",
-  "keywords": ["where"],
+  "keywords": [
+    "where"
+  ],
   "children": [],
   "export": [
     "between.json"
   ],
   "keywords_must": [
-    ["mysql", "between"]
+    [
+      "mysql",
+      "between"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/2.MySQL中阶/2.查询进阶/4.DISTINCT/distinct.md

@@ -26,7 +26,8 @@ create table goods(
 ## 答案
 
 ```sql
-select count(distinct price) from goods;
+select count(distinct price) 
+from goods;
 ```
 
 ## 选项
@@ -34,23 +35,27 @@ select count(distinct price) from goods;
 ### A
 
 ```sql
-select count(distinct *) from goods;
+select count(distinct *) 
+from goods;
 ```
 
 ### B
 
 ```sql
-select distinct count(price) from goods;
+select distinct count(price) 
+from goods;
 ```
 
 ### C
 
 ```sql
-select count(price) from goods;
+select count(price) 
+from goods;
 ```
 
 ### D
 
 ```sql
-select distinct price from goods;
+select distinct price 
+from goods;
 ```

data/2.MySQL中阶/2.查询进阶/5.ORDER BY/order_by.md

@@ -24,7 +24,9 @@ create table employee
 ## 答案
 
 ```sql
-select id, name, dept, salary from employee order by dept, salary desc;
+select id, name, dept, salary 
+from employee 
+order by dept, salary desc;
 ```
 
 ## 选项
@@ -32,28 +34,38 @@ select id, name, dept, salary from employee order by dept, salary desc;
 ### A
 
 ```sql
-select id, name, dept, salary from employee order by dept, salary;
+select id, name, dept, salary 
+from employee 
+order by dept, salary;
 ```
 
 ### B
 
 ```sql
-select id, name, dept, salary from employee order by dept desc, salary desc;
+select id, name, dept, salary 
+from employee 
+order by dept desc, salary desc;
 ```
 
 ### C
 ```sql
-select id, name, dept, salary from employee order by dept and salary desc;
+select id, name, dept, salary 
+from employee 
+order by dept and salary desc;
 ```
 
 ### D
 
 ```sql
-select id, name, dept, salary from employee order by dept, salary, id, name;
+select id, name, dept, salary 
+from employee 
+order by dept, salary, id, name;
 ```
 
 ### E
 ```sql
-select id, name, dept, salary from employee order by dept, salary desc;
+select id, name, dept, salary 
+from employee 
+order by dept, salary desc;
 ```
 

data/2.MySQL中阶/2.查询进阶/6.UNION/config.json

 {
   "node_id": "mysql-b57b6c08f5f240c6a997284e4448f088",
-  "keywords": ["union"],
+  "keywords": [
+    "union"
+  ],
   "children": [],
   "export": [
     "union.json"
   ],
   "keywords_must": [
-    ["mysql", "union"]
+    [
+      "mysql",
+      "union"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/2.MySQL中阶/2.查询进阶/6.UNION/union.md

@@ -12,10 +12,10 @@ create table employee(
 );
 
 create table customer(
-                         id int primary key auto_increment,
-                         name varchar(256),
-                         address varchar(1024),
-                         level int
+     id int primary key auto_increment,
+     name varchar(256),
+     address varchar(1024),
+     level int
     -- ignore more
 )
 

data/2.MySQL中阶/2.查询进阶/8. 分页查询/paged.md

@@ -25,7 +25,11 @@ create table orders
 ## 答案
 
 ```sql
-select id, product_id, order_date, quantity, customer_id
+select id, 
+       product_id, 
+       order_date, 
+       quantity, 
+       customer_id
 from orders
 where date = $1
 offset $2 limit 100; 
@@ -36,7 +40,11 @@ offset $2 limit 100;
 ### 缺少 limit
 
 ```sql
-select id, product_id, order_date, quantity, customer_id
+select id, 
+       product_id, 
+       order_date, 
+       quantity, 
+       customer_id
 from orders
 where date = $1
 offset $2; 
@@ -45,7 +53,11 @@ offset $2;
 ### 缺少 offset
 
 ```sql
-select id, product_id, order_date, quantity, customer_id
+select id, 
+       product_id, 
+       order_date, 
+       quantity, 
+       customer_id
 from orders
 where date = $1; 
 ```
@@ -53,7 +65,11 @@ where date = $1;
 ### 结构不对
 
 ```sql
-select id, product_id, order_date, quantity, customer_id
+select id, 
+       product_id, 
+       order_date, 
+       quantity, 
+       customer_id
 from orders
 where date = $1 and
 offset $2 and limit 100; 

data/2.MySQL中阶/3.内置函数/5.其它函数/convert.md

@@ -18,7 +18,8 @@ select name from goods;
 ##  答案
 
 ```sql
-select convert(name using 'gb18030') from goods;
+select convert(name using 'gb18030') 
+from goods;
 ```
 
 ## 选项
@@ -27,27 +28,31 @@ select convert(name using 'gb18030') from goods;
 ### A
 
 ```sql
-select str(name, 'gb18303') from goods;
+select str(name, 'gb18303') 
+from goods;
 ```
 
 
 ### B
 
 ```sql
-select encode(decode(name, 'utf8mb4'), 'gb18303') from goods;
+select encode(decode(name, 'utf8mb4'), 'gb18303') 
+from goods;
 ```
 
 
 ### C
 
 ```sql
-select convert(name from 'utf8mb4' to 'gb18303') from goods;
+select convert(name from 'utf8mb4' to 'gb18303') 
+from goods;
 ```
 
 ### D
 
 ```sql
-select convert(name to 'gb18303') from goods;
+select convert(name to 'gb18303') 
+from goods;
 ```
 
 ### E

data/2.MySQL中阶/4.聚合和分组/1. 计数/count.md

@@ -17,7 +17,8 @@ mysql> select * from items;
 当他执行
 
 ```sql
-select count(*), count(item) from items;
+select count(*), count(item) 
+from items;
 ```
 
 会得到什么结果？

data/2.MySQL中阶/4.聚合和分组/2. 求和/sum.md

@@ -4,14 +4,14 @@ Joe 想要得到 orders 表
 
 ```sql
 create table orders (
-                        id int primary key auto_increment,
-                        item_id int,
-                        amount int,
-                        unit_price decimal(12, 4),
-                        total decimal(12, 4),
-                        description varchar(2000),
-                        ts timestamp default now(),
-                        deal bool default false
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total decimal(12, 4),
+    description varchar(2000),
+    ts timestamp default now(),
+    deal bool default false
 );
 ```
 
@@ -27,7 +27,9 @@ create table orders (
 ## 答案
 
 ```sql
-select sum(total) from orders where deal and unit_price > 1000;
+select sum(total) 
+from orders 
+where deal and unit_price > 1000;
 ```
 
 ## 选项
@@ -35,17 +37,24 @@ select sum(total) from orders where deal and unit_price > 1000;
 ### A
 
 ```sql
-select sum(total) from orders having deal and unit_price > 1000;
+select sum(total) 
+from orders 
+having deal and unit_price > 1000;
 ```
 
 ### B
 
 ```sql
-select sum(total) from orders group by deal having unit_price > 1000;
+select sum(total) 
+from orders 
+group by deal 
+having unit_price > 1000;
 ```
 
 ### C
 
 ```sql
-select sum(total) from orders order by deal and unit_price > 1000;
+select sum(total) 
+from orders 
+order by deal and unit_price > 1000;
 ```
\ No newline at end of file

data/2.MySQL中阶/4.聚合和分组/3.最小值/min.md

@@ -24,7 +24,9 @@ create table employee
 ## 答案
 
 ```sql
-select dept, min(salary) from employee group by dept;
+select dept, min(salary) 
+from employee 
+group by dept;
 ```
 
 ## 选项
@@ -32,17 +34,20 @@ select dept, min(salary) from employee group by dept;
 ### A
 
 ```sql
-select dept, min(salary) from employee;
+select dept, min(salary) 
+from employee;
 ```
 
 ### B
 
 ```sql
-select dept, min(salary) from employee order by dept;
+select dept, min(salary) 
+from employee order by dept;
 ```
 
 ### C
 
 ```sql
-select dept, min(total) from employee;
+select dept, min(total) 
+from employee;
 ```
\ No newline at end of file

data/2.MySQL中阶/4.聚合和分组/5. 平均值/avg.md

@@ -24,7 +24,9 @@ create table employee
 ## 答案
 
 ```sql
-select dept, avg(salary) from employee group by dept;
+select dept, avg(salary) 
+from employee 
+group by dept;
 ```
 
 ## 选项
@@ -32,17 +34,22 @@ select dept, avg(salary) from employee group by dept;
 ### A
 
 ```sql
-select dept, avg(salary) from employee;
+select dept, avg(salary) 
+from employee;
 ```
 
 ### B
 
 ```sql
-select dept, avg(dept) from employee group by dept;
+select dept, avg(dept) 
+from employee 
+group by dept;
 ```
 
 ### C
 
 ```sql
-select dept, avg(salary) from employee group by salary;
+select dept, avg(salary) 
+from employee 
+group by salary;
 ```

data/2.MySQL中阶/4.聚合和分组/5. 平均值/config.json

 {
   "node_id": "mysql-11462fccf9d24d17a372d5c60af90f54",
-  "keywords": ["avg", "平均值"],
+  "keywords": [
+    "avg",
+    "平均值"
+  ],
   "children": [],
   "export": [
     "avg.json"

data/2.MySQL中阶/4.聚合和分组/6.HAVING/config.json

@@ -6,7 +6,10 @@
     "having.json"
   ],
   "keywords_must": [
-    ["mysql", "having"]
+    [
+      "mysql",
+      "having"
+    ]
   ],
   "keywords_forbid": [],
   "group": 1

data/2.MySQL中阶/4.聚合和分组/6.HAVING/having.md

@@ -24,7 +24,10 @@ create table employee
 ## 答案
 
 ```sql
-select dept from employee group by dept having sum(salary) > 100000;
+select dept 
+from employee 
+group by dept 
+having sum(salary) > 100000;
 ```
 
 ## 选项
@@ -32,25 +35,36 @@ select dept from employee group by dept having sum(salary) > 100000;
 ### A
 
 ```sql
-select dept from employee group by dept where sum(salary) > 100000;
+select dept 
+from employee 
+group by dept where sum(salary) > 100000;
 ```
 
 ### B
 
 ```sql
-select dept from employee where sum(salary) > 100000 group by dept;
+select dept 
+from employee 
+where sum(salary) > 100000 
+group by dept;
 ```
 
 ### C
 
 ```sql
-select dept from employee where sum(salary) > 100000 order by dept;
+select dept 
+from employee 
+where sum(salary) > 100000 
+order by dept;
 ```
 
 ### D
 
 ```sql
-select dept from employee group by dept where sum(salary) > 100000;
+select dept 
+from employee 
+group by dept 
+where sum(salary) > 100000;
 ```
 
 

data/2.MySQL中阶/5.子查询/1.相关子查询/subquery.md

@@ -48,7 +48,8 @@ having salary > max(salary)
 ```sql
 select l.id, l.name, l.dept, l.salary
 from employee as l
-         join employee as r on l.salary > max(r.salary)
+         join employee as r 
+             on l.salary > max(r.salary)
 where r.dept = 'sale'
 group by r.dept 
 ```
@@ -58,7 +59,9 @@ group by r.dept
 ```sql
 select id, name, dept, salary
 from employee
-having salary > (select max(salary) from employee where dept = 'sale')
+having salary > (select max(salary) 
+                 from employee 
+                 where dept = 'sale')
 ```
 
 

data/2.MySQL中阶/5.子查询/2. ANY/any.md

@@ -25,7 +25,9 @@ create table employee(
 ```sql
 select id, name, dept, salary
 from employee as o
-where o.salary < any(select salary from employee as i where i.dept=o.dept)
+where o.salary < any(select salary 
+                     from employee as i 
+                     where i.dept=o.dept)
 ```
 
 ## 选项
@@ -35,7 +37,8 @@ where o.salary < any(select salary from employee as i where i.dept=o.dept)
 ```sql
 select id, name, dept, salary
 from employee as o
-join employee as i on o.dept = i.dept and o.salary < i.salary
+join employee as i on 
+    o.dept = i.dept and o.salary < i.salary
 ```
 
 ### B
@@ -43,7 +46,8 @@ join employee as i on o.dept = i.dept and o.salary < i.salary
 ```sql
 select o.id, o.name, o.dept, o.salary
 from employee as o
-left join employee as i on o.dept = i.dept and o.salary < i.salary
+left join employee as i on 
+    o.dept = i.dept and o.salary < i.salary
 where i.id is null;
 ```
 
@@ -52,6 +56,7 @@ where i.id is null;
 ```sql
 select o.id, o.name, o.dept, o.salary 
 from employee as o 
-    left join employee as i on o.dept = i.dept and o.salary < i.salary 
+    left join employee as i 
+        on o.dept = i.dept and o.salary < i.salary 
 where i.id is not null;
 ```
\ No newline at end of file

data/2.MySQL中阶/5.子查询/3.ALL/all.md

@@ -25,7 +25,10 @@ create table employee(
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' != all(select post from employee as i where o.dept = i.dept); 
+where 'assistant' != 
+      all(select post 
+          from employee as i 
+          where o.dept = i.dept); 
 ```
 
 ## 选项
@@ -35,7 +38,10 @@ where 'assistant' != all(select post from employee as i where o.dept = i.dept);
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' = all(select post from employee as i where o.dept = i.dept); 
+where 'assistant' = 
+      all(select post 
+          from employee as i 
+          where o.dept = i.dept); 
 ```
 
 ### B
@@ -43,14 +49,19 @@ where 'assistant' = all(select post from employee as i where o.dept = i.dept);
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' != all(select post from employee as i where o.dept = i.dept); 
+where 'assistant' != 
+      all(select post 
+          from employee as i 
+          where o.dept = i.dept); 
 ```
 
 ### C
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' != all(select post from employee as i); 
+where 'assistant' != 
+      all(select post 
+          from employee as i); 
 ```
 
 ### D
@@ -58,5 +69,8 @@ where 'assistant' != all(select post from employee as i);
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' != ANY(select post from employee as i where o.dept = i.dept); 
+where 'assistant' != 
+      ANY(select post 
+          from employee as i 
+          where o.dept = i.dept); 
 ```
\ No newline at end of file

data/2.MySQL中阶/5.子查询/4.EXISTS/exists.md

@@ -26,7 +26,10 @@ create table employee(
 ```sql
 select id, name, dept
 from employee as o
-where not exists(select * from employee as i where o.dept = i.dept and post='assistant'); 
+where not exists(
+    select * 
+    from employee as i 
+    where o.dept = i.dept and post='assistant'); 
 ```
 
 ## 选项
@@ -36,14 +39,19 @@ where not exists(select * from employee as i where o.dept = i.dept and post='ass
 ```sql
 select id, name, dept
 from employee as o
-where exists(select * from employee as i where o.dept = i.dept and post='assistant'); 
+where exists(
+    select * 
+    from employee as i 
+    where o.dept = i.dept and post='assistant'); 
 ```
 
 ### B
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' != exists(select post from employee as i); 
+where 'assistant' != exists(
+    select post 
+    from employee as i); 
 ```
 
 ### C
@@ -51,5 +59,8 @@ where 'assistant' != exists(select post from employee as i);
 ```sql
 select id, name, dept 
 from employee as o
-where 'assistant' = not exists(select post from employee as i where o.dept = i.dept); 
+where 'assistant' = not exists(
+    select post 
+    from employee as i 
+    where o.dept = i.dept); 
 ```
\ No newline at end of file

data/2.MySQL中阶/5.子查询/5. IN/in.md

@@ -43,7 +43,9 @@ where dept in (select 'dev', 'hr');
 ```sql
 select id, dept, name, post 
 from employee
-where dept in (select * from 'dev', 'hr');
+where dept in 
+      (select * 
+       from 'dev', 'hr');
 ```
 
 ### C

data/2.MySQL中阶/5.子查询/6. 列子查询/in_column.md

@@ -24,10 +24,10 @@ create table employee
 ## 答案
 
 ```sql
-select distinct(dept)                  as dept,
-               (select count(*)
-                from employee as i
-                where i.dept = o.dept) as emp
+select distinct(dept) as dept,
+   (select count(*)
+    from employee as i
+    where i.dept = o.dept) as emp
 from employee as o;
 ```
 
@@ -36,28 +36,28 @@ from employee as o;
 ### A
 
 ```sql
-select distinct(dept)               as dept,
-               (select count(*)
-                from employee as i) as emp
+select distinct(dept) as dept,
+   (select count(*)
+    from employee as i) as emp
 from employee as o;
 ```
 
 ### B
 
 ```sql
-select distinct(dept)              as dept,
-               (select count(*)
-                from employee
-                where dept = dept) as emp
+select distinct(dept) as dept,
+   (select count(*)
+    from employee
+    where dept = dept) as emp
 from employee
 ```
 
 ### C
 
 ```sql
-select dept                    as dept,
-       (select count(*)
-        from employee as i
-        where i.dept = o.dept) as emp
+select dept as dept,
+   (select count(*)
+    from employee as i
+    where i.dept = o.dept) as emp
 from employee as o
 ```
\ No newline at end of file

data/2.MySQL中阶/6.连接查询/2. LEFT JOIN/left_join.md

@@ -34,8 +34,11 @@ Joe 想要列出所有的部门，如果这个部门有部门助理（post 为 `
 ```sql
 select d.id, d.name, e.name as assistant
 from department as d
-    left join employee as e on e.dept = d.id
-where e.post = 'assistant'
+         left join (select name, dept_id
+                    from employee
+                    where post='assistant') as e on e.dept_id = d.id
+
+
 ```
 
 ## 选项

data/2.MySQL中阶/6.连接查询/3. RIGHT JOIN/right_join.md

@@ -46,7 +46,7 @@ where d.id is null;
 ```sql
 select e.id, e.name, e.dept
 from employee as e
-         right join department as d on d.id = e.dept
+    right join department as d on d.id = e.dept
 where e.id is null;
 ```
 
@@ -55,7 +55,7 @@ where e.id is null;
 ```sql
 select e.id, e.name, e.dept
 from employee as e
-         right join department as d on d.id = e.dept
+     right join department as d on d.id = e.dept
 where d.id is null;
 ```
 

data/2.MySQL中阶/7. 索引/2.创建索引/config.json

 {
   "node_id": "mysql-fe65d5c615ad40f8ac056cc654f2d788",
-  "keywords": ["create index", "创建索引"],
+  "keywords": [
+    "create index",
+    "创建索引"
+  ],
   "children": [],
   "export": [
     "create_index.json"

data/2.MySQL中阶/7. 索引/2.创建索引/create_index.md

@@ -27,7 +27,8 @@ create table goods(
 ## 答案
 
 ```sql
-create index idx_goods_category on goods(category_id);
+create index idx_goods_category 
+    on goods(category_id);
 ```
 
 ## 选项
@@ -35,17 +36,20 @@ create index idx_goods_category on goods(category_id);
 ### A
 
 ```sql
-create unique index idx_goods_category on goods(category_id);
+create unique index idx_goods_category 
+    on goods(category_id);
 ```
 
 ### B
 
 ```sql
-create index idx_goods_category on goods(name);
+create index idx_goods_category 
+    on goods(name);
 ```
 
 ### C
 
 ```sql
-alter table goods add unique index (category_id);
+alter table goods 
+    add unique index (category_id);
 ```
\ No newline at end of file

data/2.MySQL中阶/7. 索引/3.删除索引/drop_index.md

@@ -20,7 +20,8 @@ show index from goods;
 查看 goods 表的索引（假设查到是 idx_goods_category），然后执行
 
 ```sql
-alter table goods drop index idx_goods_category;
+alter table goods 
+    drop index idx_goods_category;
 ```
 
 ## 选项
@@ -36,7 +37,8 @@ show index from goods;
 查看 goods 表的索引（假设查到是 idx_goods_category），然后执行
 
 ```sql
-alter table goods delete index idx_goods_category;
+alter table goods 
+    delete index idx_goods_category;
 ```
 
 ### B
@@ -50,7 +52,8 @@ show index from goods;
 查看 goods 表的索引（假设查到是 idx_goods_category），然后执行
 
 ```sql
-alter table goods remove index idx_goods_category;
+alter table goods 
+    remove index idx_goods_category;
 ```
 
 ### C
@@ -64,7 +67,8 @@ show index from goods;
 查看 goods 表的索引（假设查到是 idx_goods_category），然后执行
 
 ```sql
-alter table goods drop idx_goods_category;
+alter table goods 
+    drop idx_goods_category;
 ```
 
 

data/3.MySQL高阶/1.深入索引/1.唯一索引/unique.md

@@ -25,7 +25,8 @@ Joe 需要确保同一个类型下没有重名的商品，他应该怎么做？
 ## 答案
 
 ```sql
-alter table goods add unique index (category_id, name);
+alter table goods 
+    add unique index (category_id, name);
 ```
 
 ## 选项
@@ -33,17 +34,20 @@ alter table goods add unique index (category_id, name);
 ### A
 
 ```sql
-alter table goods add index (category_id, name);
+alter table goods 
+    add index (category_id, name);
 ```
 
 ### B
 
 ```sql
-alter table goods add unique index (category_id + name);
+alter table goods 
+    add unique index (category_id + name);
 ```
 
 ### C
 
 ```sql
-alter table goods add unique index (concat(category_id, name));
+alter table goods 
+    add unique index (concat(category_id, name));
 ```

data/3.MySQL高阶/1.深入索引/2.全值匹配/config.json

@@ -7,7 +7,12 @@
   "export": [
     "total_index.json"
   ],
-  "keywords_must": [["mysql", "全值匹配"]],
+  "keywords_must": [
+    [
+      "mysql",
+      "全值匹配"
+    ]
+  ],
   "keywords_forbid": [],
   "group": 2
 }
\ No newline at end of file

data/3.MySQL高阶/1.深入索引/2.全值匹配/total_index.md

@@ -25,7 +25,8 @@ create table goods(
 ## 答案
 
 ```sql
-alter table goods add index (name, price);
+alter table goods 
+    add index (name, price);
 ```
 
 ## 选项
@@ -39,11 +40,14 @@ alter table goods add index (name, price);
 建立一个计算字段：
 
 ```sql
-alter table goods add summary varchar(1024) generated always as (concat(name, '(', 0.5, ')'));
+alter table goods 
+    add summary varchar(1024) 
+        generated always as (concat(name, '(', 0.5, ')'));
 ```
 
 ### C
 
 ```sql
-alter table goods add index (concat(name, price));
+alter table goods 
+    add index (concat(name, price));
 ```
\ No newline at end of file

data/3.MySQL高阶/1.深入索引/3.匹配顺序/match_fields.md

@@ -29,7 +29,12 @@ Joe 发现有大量查询 `select id, category_id, name, price from goods where
 将该查询改写为 
 
 ```sql
-select id, category_id, name, price from goods where category_id=? and name=?;
+select id, 
+       category_id, 
+       name, 
+       price 
+from goods 
+where category_id=? and name=?;
 ```
 
 ## 选项
@@ -39,7 +44,12 @@ select id, category_id, name, price from goods where category_id=? and name=?;
 将该查询改写为
 
 ```sql
-select id, category_id, name, price from goods where category_id and name= (?, ?);
+select id, 
+       category_id, 
+       name, 
+       price 
+from goods 
+where category_id and name= (?, ?);
 ```
 
 ### B
@@ -47,7 +57,12 @@ select id, category_id, name, price from goods where category_id and name= (?, ?
 将该查询改写为
 
 ```sql
-select id, category_id, name, price from goods where not (category_id !=? or name != ?);
+select id, 
+       category_id, 
+       name, 
+       price 
+from goods 
+where not (category_id !=? or name != ?);
 ```
 
 ### C
@@ -55,6 +70,11 @@ select id, category_id, name, price from goods where not (category_id !=? or nam
 将该查询改写为
 
 ```sql
-select id, category_id, name, price from goods where not (category_id !=?) and not (name != ?);
+select id, 
+       category_id, 
+       name, 
+       price 
+from goods 
+where not (category_id !=?) and not (name != ?);
 ```
 

data/3.MySQL高阶/1.深入索引/4.组合索引/combinate.md

@@ -14,7 +14,19 @@ create table goods(
 )
 ```
 
-现有大量查询 `select id, category_id, name, price, stock from goods where stock=? and category_id=? and name like ?`，
+现有大量查询 
+```sql
+select 
+    id, 
+    category_id, 
+    name, 
+    price, 
+    stock 
+from goods 
+where stock=? 
+  and category_id=? 
+  and name like ?`，
+```
 Joe 应该如何优化？
 
 <hr/>
@@ -27,7 +39,8 @@ Joe 应该如何优化？
 ## 答案
 
 ```sql
-alter table goods add index (stock, category_id, name);
+alter table goods 
+    add index (stock, category_id, name);
 ```
 
 ## 选项
@@ -35,17 +48,20 @@ alter table goods add index (stock, category_id, name);
 ### A
 
 ```sql
-alter table goods add index (stock and category_id and name);
+alter table goods 
+    add index (stock and category_id and name);
 ```
 
 ### B
 
 ```sql
-alter table goods add index (concat(stock, category_id, name));
+alter table goods 
+    add index (concat(stock, category_id, name));
 ```
 
 ### C
 
 ```sql
-alter table goods add index (stock + category_id + name);
+alter table goods 
+    add index (stock + category_id + name);
 ```

data/3.MySQL高阶/1.深入索引/5.空间索引/geo_index.md

@@ -22,8 +22,10 @@ create table shop (
 ## 答案
 
 ```sql
-alter table shop modify location  GEOMETRY not null;
-alter table shop add INDEX geo_index(location);
+alter table shop 
+    modify location  GEOMETRY not null;
+alter table shop 
+    add INDEX geo_index(location);
 ```
 
 ## 选项
@@ -31,25 +33,31 @@ alter table shop add INDEX geo_index(location);
 ### A
 
 ```sql
-alter table shop add INDEX geo_index(location);
+alter table shop 
+    add INDEX geo_index(location);
 ```
 
 ### B
 
 ```sql
-alter table shop add INDEX location;
+alter table shop 
+    add INDEX location;
 ```
 
 ### C
 
 ```sql
-alter table shop modify location  GEOMETRY not null;
-alter table shop add INDEX location;
+alter table shop 
+    modify location  GEOMETRY not null;
+alter table shop 
+    add INDEX location;
 ```
 
 ### D
 
 ```sql
-alter table shop modify location  GEOMETRY not null;
-alter table shop add INDEX location;
+alter table shop 
+    modify location  GEOMETRY not null;
+alter table shop 
+    add INDEX location;
 ```

data/3.MySQL高阶/1.深入索引/6.全文索引/full_text_index.md

@@ -22,7 +22,8 @@ create table shop (
 ## 答案
 
 ```sql
-alter table shop add fulltext(description);
+alter table shop 
+    add fulltext(description);
 ```
 
 ## 选项
@@ -30,17 +31,20 @@ alter table shop add fulltext(description);
 ### A
 
 ```sql
-alter table shop add index fulltext(description);
+alter table shop 
+    add index fulltext(description);
 ```
 
 ### B
 
 ```sql
-alter table shop create fulltext(description);
+alter table shop 
+    create fulltext(description);
 ```
 
 ### C
 
 ```sql
-alter table shop alter description add fulltext(description);
+alter table shop 
+    alter description add fulltext(description);
 ```
\ No newline at end of file

data/3.MySQL高阶/1.深入索引/7.隐藏索引/config.json

 {
   "node_id": "mysql-c57e1195b0914cd38798ce029156ec87",
-  "keywords": ["invisible", "visible", "隐藏索引"],
+  "keywords": [
+    "invisible",
+    "visible",
+    "隐藏索引"
+  ],
   "children": [],
   "export": [
     "invisible.json"

data/3.MySQL高阶/1.深入索引/7.隐藏索引/invisible.md

@@ -28,13 +28,15 @@ Joe 应该怎么做？
 先执行
 
 ```sql
-alter table shop alter index description invisible ;
+alter table shop 
+    alter index description invisible ;
 ```
 
 将索引隐藏，观察确认没有影响后再执行
 
 ```sql
-alter table shop drop index description;
+alter table shop 
+    drop index description;
 ```
 
 删除。
@@ -47,7 +49,8 @@ alter table shop drop index description;
 先备份 shop 表，然后执行
 
 ```sql
-alter table shop drop index description;
+alter table shop 
+    drop index description;
 ```
 删除，有问题的话从备份文件恢复。
 
@@ -60,13 +63,15 @@ alter table shop drop index description;
 先执行
 
 ```sql
-alter table shop alter index description invisible ;
+alter table shop 
+    alter index description invisible ;
 ```
 
 将索引隐藏，确认后再执行
 
 ```sql
-alter table shop alter index description visible ;
+alter table shop 
+    alter index description visible ;
 ```
 
 恢复索引可见。
\ No newline at end of file

data/3.MySQL高阶/1.深入索引/8.函数和表达式索引/daily_payment.md

@@ -40,7 +40,8 @@ mysql> desc payment;
 建立表达式索引
 
 ```sql
-alter table payment add index idx_payment_date((date(payment_date)));
+alter table payment 
+    add index idx_payment_date((date(payment_date)));
 ```
 
 ## 选项
@@ -50,7 +51,8 @@ alter table payment add index idx_payment_date((date(payment_date)));
 建立视图
 
 ```sql
-create view view_daily_payment as select date(payment_date) as day, amount from payment;
+create view view_daily_payment as 
+    select date(payment_date) as day, amount from payment;
 ```
 
 然后在视图 view_daily_payment 上执行
@@ -75,7 +77,8 @@ create index idx_payment_date on payment(payment_date);
 建立计算列
 
 ```sql
-alter table payment add day date generated always as (date(payment_date)) stored; 
+alter table payment add day date 
+    generated always as (date(payment_date)) stored; 
 ```
 
 然后使用它改写查询

data/3.MySQL高阶/2.SQL高级技巧/1.CTE和递归查询/continuous.md

@@ -28,13 +28,14 @@ create table orders
 ## 答案
 
 ```sql
-with recursive r(id) as (select id
-                         from orders
-                         where id = $1
-                         union
-                         select d.id
-                         from orders as d
-                                  join r on d.id = r.id + 1)
+with recursive r(id) as (
+     select id
+     from orders
+     where id = $1
+     union
+     select d.id
+     from orders as d
+              join r on d.id = r.id + 1)
 select orders.id, content
 from orders
          join r on orders.id = r.id;
@@ -50,8 +51,8 @@ from orders
 
 ```sql
 select data.id, content
-from orders
-         join orders as r on orders.id = r.id - 1
+from orders 
+    join orders as r on orders.id = r.id - 1
 where id = $1;
 ```
 
@@ -60,7 +61,10 @@ where id = $1;
 ```sql
 select id, content
 from orders
-where id in (select id from orders where id = id + 1);
+where id in (
+    select id 
+    from orders 
+    where id = id + 1);
 ```
 
 ### D

data/3.MySQL高阶/2.SQL高级技巧/2.Window Function/salary.md

@@ -25,7 +25,13 @@ create table employee
 
 ```sql
 select id, name, dept, salary
-from (select id, name, dept, salary, rank() over (partition by dept order by salary desc) as r
+from (select id, 
+             name, 
+             dept, 
+             salary, 
+             rank() over (
+                 partition by dept 
+                 order by salary desc) as r
       from employee) as t
 where r <= 5;
 ```
@@ -58,16 +64,23 @@ where count(r.id) <= 5;
 ```sql
 select l.id, l.name, l.dept, l.salary
 from employee as l
-         join (select max(salary, 5) as salary, dept
-               from employee
-               group by dept) as r
-              on l.dept = r.dept and l.salary = r.salary
+         join (
+         select max(salary, 5) as salary, dept
+         from employee
+         group by dept) as r
+         on l.dept = r.dept and l.salary = r.salary
 ```
 
 ### 结构错误
 
 ```sql
-select id, name, dept, salary, rank() over (partition by dept order by salary desc) as r
+select id, 
+       name, 
+       dept, 
+       salary, 
+       rank() over (
+           partition by dept 
+           order by salary desc) as r
 from employee
 where r <= 5;
 ```
@@ -75,7 +88,13 @@ where r <= 5;
 ### 结构错误
 
 ```sql
-select id, name, dept, salary, rank() as r over (partition by dept order by salary desc)
+select id, 
+       name, 
+       dept, 
+       salary, 
+       rank() as r over (
+            partition by dept 
+            order by salary desc)
 from employee
 where r <= 5;
 ```

data/3.MySQL高阶/2.SQL高级技巧/3.透视表 /config.json

@@ -9,7 +9,9 @@
   "export": [
     "pivot.json"
   ],
-  "keywords_must": ["mysql"],
+  "keywords_must": [
+    "mysql"
+  ],
   "keywords_forbid": [],
   "group": 1
 }
\ No newline at end of file

data/3.MySQL高阶/2.SQL高级技巧/3.透视表 /pivot.md

@@ -25,18 +25,30 @@ create index on sales(created_at);
 
 ```sql
 select sku_id, 
-       sum(case extract(month from created_at) when 1 then amount else 0 end) as Jan,
-       sum(case extract(month from created_at) when 2 then amount else 0 end) as Feb,
-       sum(case extract(month from created_at) when 3 then amount else 0 end) as Mar,
-       sum(case extract(month from created_at) when 4 then amount else 0 end) as Apr,
-       sum(case extract(month from created_at) when 5 then amount else 0 end) as May,
-       sum(case extract(month from created_at) when 6 then amount else 0 end) as June,
-       sum(case extract(month from created_at) when 7 then amount else 0 end) as July,
-       sum(case extract(month from created_at) when 8 then amount else 0 end) as Aug,
-       sum(case extract(month from created_at) when 9 then amount else 0 end) as Sept,
-       sum(case extract(month from created_at) when 10 then amount else 0 end) as Oct,
-       sum(case extract(month from created_at) when 11 then amount else 0 end) as Nov,
-       sum(case extract(month from created_at) when 12 then amount else 0 end) as Dec
+       sum(case extract(month from created_at) 
+           when 1 then amount else 0 end) as Jan,
+       sum(case extract(month from created_at) 
+           when 2 then amount else 0 end) as Feb,
+       sum(case extract(month from created_at) 
+           when 3 then amount else 0 end) as Mar,
+       sum(case extract(month from created_at) 
+           when 4 then amount else 0 end) as Apr,
+       sum(case extract(month from created_at) 
+           when 5 then amount else 0 end) as May,
+       sum(case extract(month from created_at) 
+           when 6 then amount else 0 end) as June,
+       sum(case extract(month from created_at) 
+           when 7 then amount else 0 end) as July,
+       sum(case extract(month from created_at) 
+           when 8 then amount else 0 end) as Aug,
+       sum(case extract(month from created_at) 
+           when 9 then amount else 0 end) as Sept,
+       sum(case extract(month from created_at) 
+           when 10 then amount else 0 end) as Oct,
+       sum(case extract(month from created_at) 
+           when 11 then amount else 0 end) as Nov,
+       sum(case extract(month from created_at) 
+           when 12 then amount else 0 end) as Dec
 from sales
 where created_at between '2020-01-01'::timestamp and '2021-01-01'::timestamp
 group by sku_id; 
@@ -78,18 +90,30 @@ group by sku_id, extract(month from created_at);
 
 ```sql
 select sku_id, 
-       sum(amount having extract(month from created_at) = 1) as Jan,
-       sum(amount having extract(month from created_at) = 2) as Feb,
-       sum(amount having extract(month from created_at) = 3) as Mar,
-       sum(amount having extract(month from created_at) = 4) as Apr,
-       sum(amount having extract(month from created_at) = 5) as May,
-       sum(amount having extract(month from created_at) = 6) as June,
-       sum(amount having extract(month from created_at) = 7) as July,
-       sum(amount having extract(month from created_at) = 8) as Aug,
-       sum(amount having extract(month from created_at) = 9) as Sept,
-       sum(amount having extract(month from created_at) = 10) as Oct,
-       sum(amount having extract(month from created_at) = 11) as Nov,
-       sum(amount having extract(month from created_at) = 12) as Dec
+       sum(amount having 
+           extract(month from created_at) = 1) as Jan,
+       sum(amount having 
+           extract(month from created_at) = 2) as Feb,
+       sum(amount having 
+           extract(month from created_at) = 3) as Mar,
+       sum(amount having 
+           extract(month from created_at) = 4) as Apr,
+       sum(amount having 
+           extract(month from created_at) = 5) as May,
+       sum(amount having 
+           extract(month from created_at) = 6) as June,
+       sum(amount having 
+           extract(month from created_at) = 7) as July,
+       sum(amount having 
+           extract(month from created_at) = 8) as Aug,
+       sum(amount having 
+           extract(month from created_at) = 9) as Sept,
+       sum(amount having 
+           extract(month from created_at) = 10) as Oct,
+       sum(amount having 
+           extract(month from created_at) = 11) as Nov,
+       sum(amount having 
+           extract(month from created_at) = 12) as Dec
 from sales
 where created_at between '2020-01-01'::timestamp and '2021-01-01'::timestamp
 group by sku_id, extract(month from created_at); 

data/3.MySQL高阶/2.SQL高级技巧/4.Double Not Exists/DoubleNotExists.md

@@ -46,14 +46,14 @@ Joe 想要找出参与了所有投标的企业（有围标嫌疑），那么这
 select *
 from company
 where not exists(
-        select *
-        from invitation
-        where not exists(
-                select *
-                from bids
-                where invitation.id = bids.invitation_id
-                  and bids.company_id = company.id
-            )
+    select *
+    from invitation
+    where not exists(
+            select *
+            from bids
+            where invitation.id = bids.invitation_id
+              and bids.company_id = company.id
+        )
     )
 ```
 
@@ -82,7 +82,9 @@ where id = any (select company_id
 ```sql
 select *
 from company
-where company.id in (select distinct company_id from bids) 
+where company.id in (
+    select distinct company_id 
+    from bids) 
 ```
 
 ### D
@@ -91,8 +93,8 @@ where company.id in (select distinct company_id from bids)
 select *
 from company
 where exists(
-              select *
-              from bids
-              where bids.company_id = company.id
-          ) 
+      select *
+      from bids
+      where bids.company_id = company.id
+) 
 ```
\ No newline at end of file

data/3.MySQL高阶/2.SQL高级技巧/4.Double Not Exists/config.json

@@ -9,7 +9,9 @@
   "export": [
     "DoubleNotExists.json"
   ],
-  "keywords_must": ["mysql"],
+  "keywords_must": [
+    "mysql"
+  ],
   "keywords_forbid": [],
   "groups": 2
 }
\ No newline at end of file

data/3.MySQL高阶/2.SQL高级技巧/5.写入和冲突/score.md

@@ -22,7 +22,8 @@ create table book_in(
 ## 答案
 
 ```sql
-insert into book_in(login, score) values ($1, $2) on DUPLICATE KEY update score=$2;
+insert into book_in(login, score) 
+values ($1, $2) on DUPLICATE KEY update score=$2;
 ```
 
 ## 选项

data/3.MySQL高阶/3.过程化编程/5. 游标/cursor.md

@@ -74,7 +74,9 @@ end;
 create procedure make_trade()
 begin
     DECLARE done INT DEFAULT FALSE;
-    declare cur_orders cursor for select id, price, item_id, amount from orders order by id limit 1000;
+    declare cur_orders cursor for 
+        select id, price, item_id, amount 
+        from orders order by id limit 1000;
     declare order_id, item_id, amount INT;
     declare price decimal(12, 4);
     DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
@@ -100,7 +102,11 @@ end;
 ```sql
 create procedure make_trade()
 begin
-    declare cur_orders cursor for select id, price, item_id, amount from orders order by id limit 1000;
+    declare cur_orders cursor for 
+        select id, price, item_id, amount 
+        from orders 
+        order by id 
+        limit 1000;
     declare order_id, item_id, amount INT;
     declare price decimal(12, 4);
     DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
@@ -122,7 +128,11 @@ end;
 create procedure make_trade()
 begin
     DECLARE done INT DEFAULT FALSE;
-    declare cur_orders cursor for select id, price, item_id, amount from orders order by id limit 1000;
+    declare cur_orders cursor for 
+        select id, price, item_id, amount 
+        from orders 
+        order by id 
+        limit 1000;
     declare order_id, item_id, amount INT;
     declare price decimal(12, 4);
     DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
@@ -143,7 +153,11 @@ end;
 create procedure make_trade()
 begin
     DECLARE done INT DEFAULT FALSE;
-    declare cur_orders cursor for select id, price, item_id, amount from orders order by id limit 1000;
+    declare cur_orders cursor for 
+        select id, price, item_id, amount 
+        from orders 
+        order by id 
+        limit 1000;
     declare order_id, item_id, amount INT;
     declare price decimal(12, 4);
     DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

data/3.MySQL高阶/3.过程化编程/5. 游标/cursor_desc.md

@@ -19,24 +19,16 @@
 
 ### A
 
-```
 "DECLARE 游标名字 CURSOR FOR 查询语句;" 用来声明游标
-```
 
 ### B
 
-```
 定义好游标之后，需要使用"OPEN 游标名;"来打开游标
-```
 
 ### C
 
-```
 游标使用有需要关闭"CLOSE 游标名;"
-```
 
 ### D
 
-```
 游标就像指针一样，可以定位操作查询的数据
-```
\ No newline at end of file

data/3.MySQL高阶/4.设计优化/1.生成列/generated.md

@@ -30,7 +30,8 @@ column_name data_type [GENERATED ALWAYS] AS (expression)
 ## 答案
 
 ```sql
-alter table points add modulus double generated always as (sqrt(x*x + y*y));
+alter table points add modulus double 
+    generated always as (sqrt(x*x + y*y));
 ```
 
 ## 选项
@@ -38,17 +39,20 @@ alter table points add modulus double generated always as (sqrt(x*x + y*y));
 ### A
 
 ```sql
-create generated modulus on table points as (sqrt(x*x + y*y));
+create generated modulus 
+    on table points as (sqrt(x*x + y*y));
 ```
 
 ### B
 
 ```sql
-alter table points add modulus generated always as (sqrt(x*x + y*y));
+alter table points 
+    add modulus generated always as (sqrt(x*x + y*y));
 ```
 
 ### C
 
 ```sql
-alter table points add modulus float generated sqrt(x*x + y*y);
+alter table points 
+    add modulus float generated sqrt(x*x + y*y);
 ```

data/3.MySQL高阶/4.设计优化/4.增加中间表/daily_payment2.md

@@ -38,26 +38,35 @@ group by date(payment_date);
 建立中间表并建立索引。
 
 ```postgresql
-create table daily_payment(day date primary key , amount decimal(12, 4));
+create table daily_payment(
+    day date primary key , 
+    amount decimal(12, 4));
 
 insert into daily_payment(day, amount) 
-select payment_date::date as day, sum(amount) as amount from payment group by day;
+select payment_date::date as day, 
+       sum(amount) as amount 
+from payment group by day;
 
 ```
 
 使用
 
 ```sql
-select day, amount from view_daily_payment where day between $1 and $2;
+select day, amount 
+from view_daily_payment 
+where day between $1 and $2;
 ```
 
 进行查询。并且每天定时执行一次刷新命令
 
 ```sql
 insert into daily_payment(day, amount)
-select date(payment_date) as day, sum(amount) as amount 
+select date(payment_date) as day, 
+       sum(amount) as amount 
 from payment
-where date(payment_date) between DATE_SUB(CURDATE(), INTERVAL 2 DAY) and DATE_SUB(CURDATE(), INTERVAL 1 DAY) 
+where date(payment_date) 
+    between DATE_SUB(CURDATE(), INTERVAL 2 DAY) 
+    and DATE_SUB(CURDATE(), INTERVAL 1 DAY) 
 group by day;
 
 ```
@@ -69,7 +78,8 @@ group by day;
 在 payment_date 列上建立索引
 
 ```sql
-create index idx_payment_date on payment(payment_date);
+create index idx_payment_date on 
+    payment(payment_date);
 ```
 
 ### 不会优化 sum
@@ -77,7 +87,8 @@ create index idx_payment_date on payment(payment_date);
 建立计算列
 
 ```sql
-alter table payment add day date generated always as ( payment_date::date ) stored 
+alter table payment add day date 
+    generated always as ( payment_date::date ) stored 
 ```
 
 然后使用它改写查询
@@ -94,7 +105,8 @@ group by day;
 建立表达式索引
 
 ```sql
-create index idx_payment_day on payment((date(payment_date)));
+create index idx_payment_day 
+    on payment((date(payment_date)));
 ```
 
 ### 不做物化，对查询速度不会有显著改善
@@ -102,7 +114,8 @@ create index idx_payment_day on payment((date(payment_date)));
 建立视图
 
 ```sql
-create view view_daily_payment as select date(payment_date) as day, amount from payment;
+create view view_daily_payment as 
+    select date(payment_date) as day, amount from payment;
 ```
 
 然后在视图 view_daily_payment 上执行

data/3.MySQL高阶/5.运维与架构/6.复制过滤器/filter.md

@@ -84,7 +84,8 @@ SET GLOBAL replicate-ignore-db=goods,auth;
 可以在从库执行以下命令，设定忽略 goods 数据库和 auth 数据库
 
 ```sql
-CHANGE REPLICATION FILTER REPLICATE_IGNORE_DB=(goods, auth);
+CHANGE REPLICATION FILTER 
+    REPLICATE_IGNORE_DB=(goods, auth);
 ```
 
 ### J
@@ -108,7 +109,8 @@ SET GLOBAL replicate-do-table=goods.goods,goods.orders;
 可以在在从库的 MySQL 命令行设定只同步 goods 表和 orders 表
 
 ```sql
-CHANGE REPLICATION FILTER REPLICATE_DO_TABLE=( goods.goods,goods.orders);
+CHANGE REPLICATION FILTER 
+    REPLICATE_DO_TABLE=( goods.goods,goods.orders);
 ```
 
 ### M
@@ -124,7 +126,8 @@ replicate-do-table=goods.goods,goods.orders
 可以在在从库的 MySQL 命令行设定只同步名称前缀为 `t_` 的表
 
 ```sql
-CHANGE REPLICATION FILTER REPLICATE_WILD_DO_TABLE =( goods.t_%);
+CHANGE REPLICATION FILTER 
+    REPLICATE_WILD_DO_TABLE =( goods.t_%);
 ```
 
 ### P
@@ -140,7 +143,8 @@ SET GLOBAL replicate-ignore-table=goods.orders,goods.trade;
 可以在从库的 MySQL 命令行设定忽略 orders 和 trade 表
 
 ```sql
-CHANGE REPLICATION FILTER REPLICATE_ IGNORE_TABLE=( goods.orders,goods.trade);
+CHANGE REPLICATION FILTER 
+    REPLICATE_ IGNORE_TABLE=( goods.orders,goods.trade);
 ```
 
 
@@ -157,7 +161,8 @@ replicate-ignore-table =goods.orders,goods.trade
 可以在在从库的 MySQL 命令行设定忽略名称前缀为 `o_` 的表
 
 ```sql
-CHANGE REPLICATION FILTER REPLICATE_WILD_DO_TABLE =( goods.o_%);
+CHANGE REPLICATION FILTER 
+    REPLICATE_WILD_DO_TABLE =( goods.o_%);
 ```
 
 ### S

data/3.MySQL高阶/6.查询优化/3. EXPLAIN/explain.md

@@ -3,13 +3,14 @@
 Joe 从交易服务中发现了一些高频查询和慢查询，例如
 
 ```sql
-with recursive r(id) as (select id
-                         from orders
-                         where id = $1
-                         union
-                         select d.id
-                         from orders as d
-                                  join r on d.id = r.id + 1)
+with recursive r(id) as (
+    select id
+    from orders
+    where id = $1
+    union
+    select d.id
+    from orders as d
+          join r on d.id = r.id + 1)
 select orders.id, content
 from orders
          join r on orders.id = r.id;
@@ -29,13 +30,14 @@ from orders
 在测试库使用 
 
 ```sql
-explain with recursive r(id) as (select id
-                         from orders
-                         where id = $1
-                         union
-                         select d.id
-                         from orders as d
-                                  join r on d.id = r.id + 1)
+explain with recursive r(id) as (
+    select id
+    from orders
+    where id = $1
+    union
+    select d.id
+    from orders as d
+          join r on d.id = r.id + 1)
 select orders.id, content
 from orders
          join r on orders.id = r.id;
@@ -44,13 +46,14 @@ from orders
 进行剖分，对于需要了解详细执行计划的使用
 
 ```sql
-explain analyze with recursive r(id) as (select id
-                         from orders
-                         where id = 100
-                         union
-                         select d.id
-                         from orders as d
-                                  join r on d.id = r.id + 1)
+explain analyze with recursive r(id) as (
+    select id
+    from orders
+    where id = 100
+    union
+    select d.id
+    from orders as d
+          join r on d.id = r.id + 1)
 select orders.id 
 from orders
          join r on orders.id = r.id;
@@ -73,13 +76,14 @@ from orders
 使用
 
 ```sql
-analyze with recursive r(id) as (select id
-                         from orders
-                         where id = 100
-                         union
-                         select d.id
-                         from orders as d
-                                  join r on d.id = r.id + 1)
+analyze with recursive r(id) as (
+    select id
+    from orders
+    where id = 100
+    union
+    select d.id
+    from orders as d
+          join r on d.id = r.id + 1)
 select orders.id 
 from orders
          join r on orders.id = r.id;