view

data/2.MySQL中阶/2. 查询/6.UNION/union.json

@@ -3,5 +3,5 @@
   "author": "ccat",
   "source": "union.md",
   "notebook_enable": false,
-  "exercise_id": "331f369b150340f9989ccea8abfcd42f"
+  "exercise_id": "7c8ecf1329e64616a56e5def05d52c6c"
 }
\ No newline at end of file

data/2.MySQL中阶/7.视图/1.视图的基本概念/config.json

@@ -2,7 +2,9 @@
   "node_id": "mysql-95a29a6a448849029d548393bbdf283e",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": [
+    "view.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/7.视图/1.视图的基本概念/view.json

+{
+  "type": "code_options",
+  "author": "Mars Liu",
+  "source": "view.md",
+  "notebook_enable": false,
+  "exercise_id": "5335391d25d0428aa3dbe1759ac1ef37"
+}
\ No newline at end of file

data/2.MySQL中阶/7.视图/1.视图的基本概念/view.md

+# 视图
+
+关于 MySQL 的视图，以下哪些说法是正确的？
+
+1. 视图可以看作预处理的查询
+2. 视图可以作为表用在查询中
+3. 包含主键的视图可以更新
+4. 与源数据满足一一对应关系的视图可以更新
+5. 包含列子查询的视图不能更新
+6. 包含 distinct 的视图不能更新
+7. 包含 union 或 union all 的视图不能更新
+8. 可以给用户授予指定视图的 show view 权限，以控制其访问
+
+## 答案
+
+所有都对
+
+## 选项
+
+### A
+
+所有都不对
+
+### B
+
+```
+1, 2, 3, 4, 5
+```
+
+### C
+
+```
+2, 3, 4, 5, 6, 7, 8
+```
+
+### D
+
+```
+1, 3, 5, 7
+```
+
+
+### E
+
+```
+5, 6, 7, 8
+```
+
+### F
+
+```
+4, 5, 7
+```
+

data/2.MySQL中阶/7.视图/2. 创建视图/config.json

 {
   "node_id": "mysql-9339ebb389474492a0ba2c2ff29e78fb",
-  "keywords": ["create view"],
+  "keywords": [
+    "create view"
+  ],
   "children": [],
-  "export": [],
+  "export": [
+    "create_view.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/7.视图/2. 创建视图/create_view.json

+{
+  "type": "code_options",
+  "author": "Mars Liu",
+  "source": "create_view.md",
+  "notebook_enable": false,
+  "exercise_id": "990e457f98db463b9fe14831f6ab2afc"
+}
\ No newline at end of file

data/2.MySQL中阶/7.视图/2. 创建视图/create_view.md

+# 创建视图
+
+Joe 想要基于 
+
+```mysql
+create table employee(
+    id int primary key auto_increment,
+    name varchar(256),
+    address varchar(1024),
+    dept varchar(64)
+    -- ignore more
+);
+
+create table customer(
+                         id int primary key auto_increment,
+                         name varchar(256),
+                         address varchar(1024),
+                         level int
+    -- ignore more
+)
+```
+
+创建视图 v_addresses，包含写姓名和地址两列。下列哪个正确？
+
+## 答案
+
+```mysql
+create view v_addresses as
+    select name, address from employee
+    union
+    select name, address from customer;
+```
+
+## 选项
+
+### A
+
+```mysql
+create view v_addresses as
+    select * from employee
+    union
+    select * from customer;
+```
+
+### B
+
+```mysql
+create view v_addresses as
+    select name, address from employee
+    union
+    select name, address from customer;
+```
+
+### C
+
+```mysql
+create view v_addresses as
+begin;
+    select name, address from employee
+    select name, address from customer;
+end;
+```
+
+### D
+
+```mysql
+create view v_addresses
+    select name, address from employee
+    union
+    select name, address from customer;
+```

data/2.MySQL中阶/7.视图/3. 修改视图/alter_view.json

+{
+  "type": "code_options",
+  "author": "Mars Liu",
+  "source": "alter_view.md",
+  "notebook_enable": false,
+  "exercise_id": "a54d8dc829b64c78b63f3480af42e80e"
+}
\ No newline at end of file

data/2.MySQL中阶/7.视图/3. 修改视图/alter_view.md

+# 修改视图
+
+针对用户表和员工表：
+
+```mysql
+create table employee(
+    id int primary key auto_increment,
+    name varchar(256),
+    address varchar(1024),
+    dept varchar(64)
+    -- ignore more
+);
+
+create table customer(
+                         id int primary key auto_increment,
+                         name varchar(256),
+                         address varchar(1024),
+                         level int
+    -- ignore more
+)
+```
+
+Joe 建立了联系人视图：
+
+```mysql
+create view v_contacts as
+    select name, address from employee
+    union
+    select name, address from customer;
+```
+
+现在，他想要加入一列 catalog ，区分员工和顾客，下面哪一个做法是错的？
+
+
+## 答案
+
+```mysql
+create if not exists view v_contacts as
+    select name, address, 'employee' as catalog from employee
+    union
+    select name, address, 'customer' as catalog from customer;
+```
+
+## 选项
+
+## A
+
+```mysql
+alter view v_contacts as
+    select name, address, 'employee' as catalog from employee
+    union
+    select name, address, 'customer' as catalog from customer;
+    
+```
+
+
+### B
+
+```mysql
+create or replace view v_contacts as
+    select name, address, 'employee' as catalog from employee
+    union
+    select name, address, 'customer' as catalog from customer;
+    
+```
+
+### C
+
+```mysql
+drop view v_contacts;
+create view v_contacts as
+    select name, address, 'employee' as catalog from employee
+    union
+    select name, address, 'customer' as catalog from customer;
+    
+```
\ No newline at end of file

data/2.MySQL中阶/7.视图/4. 修改视图/config.json → data/2.MySQL中阶/7.视图/3. 修改视图/config.json

@@ -2,7 +2,9 @@
   "node_id": "mysql-3a51b0740b704d92a534335a7a8dfd6e",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": [
+    "alter_view.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/7.视图/3.物化视图/config.json

-{
-  "node_id": "mysql-9e6db7d333c348c99d943774664792a7",
-  "keywords": [],
-  "children": [],
-  "export": [],
-  "keywords_must": [],
-  "keywords_forbid": [],
-  "group": 0
-}
\ No newline at end of file

data/2.MySQL中阶/7.视图/6. 删除视图/config.json → data/2.MySQL中阶/7.视图/4. 删除视图/config.json

@@ -2,7 +2,9 @@
   "node_id": "mysql-36171582b8324dc98ff16d9b0cac406d",
   "keywords": [],
   "children": [],
-  "export": [],
+  "export": [
+    "drop_view.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0

data/2.MySQL中阶/7.视图/4. 删除视图/drop_view.json

+{
+  "type": "code_options",
+  "author": "Mars Liu",
+  "source": "drop_view.md",
+  "notebook_enable": false,
+  "exercise_id": "3ef595b611414ae7957ffa93a91a5b99"
+}
\ No newline at end of file

data/2.MySQL中阶/7.视图/4. 删除视图/drop_view.md

+# 删除视图
+
+
+Joe 建立了联系人视图：
+
+```mysql
+create view v_contacts as
+    select name, address from employee
+    union
+    select name, address from customer;
+```
+
+现在，他完成了相关工作，想要删掉这个视图，应该执行哪个操作？
+
+
+## 答案
+
+```mysql
+drop view v_contacts;
+```
+
+## 选项
+
+## A
+
+```mysql
+delete from v_contacts;
+```
+
+
+### B
+
+```mysql
+delete from v_contacts where 1=1;
+```
+
+### C
+
+```mysql
+truncate table v_contacts;
+```
\ No newline at end of file

data/2.MySQL中阶/7.视图/5. 更新视图数据/config.json

-{
-  "node_id": "mysql-caf587fff11a43069351e61c98442dd1",
-  "keywords": ["update", "view"],
-  "children": [],
-  "export": [],
-  "keywords_must": [],
-  "keywords_forbid": [],
-  "group": 0
-}
\ No newline at end of file

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

@@ -3,5 +3,5 @@
   "author": "Mars Liu",
   "source": "DoubleNotExists.md",
   "notebook_enable": false,
-  "exercise_id": "2fabb69f22224e48a26fec8911798ceb"
+  "exercise_id": "b9381a1d56da4de0862f5a8d3c7bb59a"
 }
\ No newline at end of file

data/tree.json

@@ -509,7 +509,11 @@
                   {
                     "存储引擎": {
                       "node_id": "mysql-af89d54d66974111b4f67aeba2af7161",
-                      "keywords": [],
+                      "keywords": [
+                        "engine",
+                        "innodb",
+                        "myisam"
+                      ],
                       "children": [],
                       "keywords_must": [],
                       "keywords_forbid": []
@@ -582,7 +586,9 @@
                   {
                     "UNION": {
                       "node_id": "mysql-b57b6c08f5f240c6a997284e4448f088",
-                      "keywords": [],
+                      "keywords": [
+                        "union"
+                      ],
                       "children": [],
                       "keywords_must": [],
                       "keywords_forbid": []
@@ -923,15 +929,6 @@
                       "keywords_forbid": []
                     }
                   },
-                  {
-                    "物化视图": {
-                      "node_id": "mysql-9e6db7d333c348c99d943774664792a7",
-                      "keywords": [],
-                      "children": [],
-                      "keywords_must": [],
-                      "keywords_forbid": []
-                    }
-                  },
                   {
                     " 修改视图": {
                       "node_id": "mysql-3a51b0740b704d92a534335a7a8dfd6e",
@@ -941,18 +938,6 @@
                       "keywords_forbid": []
                     }
                   },
-                  {
-                    " 更新视图数据": {
-                      "node_id": "mysql-caf587fff11a43069351e61c98442dd1",
-                      "keywords": [
-                        "update",
-                        "view"
-                      ],
-                      "children": [],
-                      "keywords_must": [],
-                      "keywords_forbid": []
-                    }
-                  },
                   {
                     " 删除视图": {
                       "node_id": "mysql-36171582b8324dc98ff16d9b0cac406d",
@@ -1612,6 +1597,19 @@
                       "keywords_forbid": []
                     }
                   },
+                  {
+                    "Double Not Exists": {
+                      "node_id": "mysql-72761d60ad7c4a9a9c87435daca246b9",
+                      "keywords": [
+                        "exists",
+                        "not exists",
+                        "double not exists"
+                      ],
+                      "children": [],
+                      "keywords_must": [],
+                      "keywords_forbid": []
+                    }
+                  },
                   {
                     "写入和冲突": {
                       "node_id": "mysql-f9f2ae841cf14d079c8433c833d3396d",
@@ -1801,7 +1799,10 @@
                   {
                     "增加中间表": {
                       "node_id": "mysql-a2ddae1b044149ecbb74db3b6eb32721",
-                      "keywords": [],
+                      "keywords": [
+                        "middle",
+                        "中间表"
+                      ],
                       "children": [],
                       "keywords_must": [],
                       "keywords_forbid": []