diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
index de1019c8ec3b4e73d05166d16c80939cbf1adb8a..f740f9be93742bba848dd60d1e9d67d4af826975 100644
--- "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
@@ -1,8 +1,10 @@
 {
   "node_id": "mysql-27ff66e31d3d4118977cbbc04da6887e",
-  "keywords": [],
+  "keywords": ["text", "varchar", "char", "字符串", "文本"],
   "children": [],
-  "export": [],
+  "export": [
+    "description.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0
diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.json" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.json"
new file mode 100644
index 0000000000000000000000000000000000000000..80b0216a4914f68863f575774b51a16f729dd0c1
--- /dev/null
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "Mars",
+  "source": "description.md",
+  "notebook_enable": false,
+  "exercise_id": "772f9b0947074197bbeb414fd5a094b0"
+}
\ No newline at end of file
diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.md" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.md"
new file mode 100644
index 0000000000000000000000000000000000000000..4d29f3bb15b186362b8ebc8521d43d68d68820e7
--- /dev/null
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/3.\346\226\207\346\234\254\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/description.md"
@@ -0,0 +1,88 @@
+# 文本字段
+
+Joe 在设计订单表，他已经完成了下列内容：
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    ts timestamp default now()
+);
+```
+
+现在他需要给订单表加入一个 description 字段，这个字段需要保存订单的文字说明，这些文本不会超过两千字节， Joe 应该把建表语句修改为：
+
+## 答案
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    ts timestamp default now()
+);
+```
+
+## 选项
+
+### A
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description char(2000),
+    ts timestamp default now()
+);
+```
+
+### B
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(256) default '',
+    ts timestamp default now()
+);
+```
+
+### C
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description text(2000),
+    ts timestamp default now()
+);
+```
+
+### D
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description tinytext(2000),
+    ts timestamp default now()
+);
+```
\ No newline at end of file
diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.json" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.json"
new file mode 100644
index 0000000000000000000000000000000000000000..ac622bb210040a36347c1e4692e417accc975ce6
--- /dev/null
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.json"
@@ -0,0 +1,7 @@
+{
+  "type": "code_options",
+  "author": "Mars",
+  "source": "binary.md",
+  "notebook_enable": false,
+  "exercise_id": "b3cdc6ba96d544969c08fe697df32dde"
+}
\ No newline at end of file
diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.md" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.md"
new file mode 100644
index 0000000000000000000000000000000000000000..8fd9ef4d39e8e0bc4851f6cb909e44c2d42a726c
--- /dev/null
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/binary.md"
@@ -0,0 +1,94 @@
+# 二进制字符串
+
+现在 Joe 的订单表已经有了如下形态：
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    ts timestamp default now()
+);
+```
+
+他需要添加一个字段，用来保存订单的相关图片，由于特殊的业务需要，这些图片必须保存在数据库中，图片的大小不超过100K。那么他应该将建表语句修改为：
+
+## 答案
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    picture blob,
+    ts timestamp default now()
+);
+```
+
+## 选项
+
+### A
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    picture varchar(100000),
+    ts timestamp default now()
+);
+```
+
+### B
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    picture text,
+    ts timestamp default now()
+);
+```
+
+### C
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    picture binary(100000),
+    ts timestamp default now()
+);
+```
+
+### D
+
+```mysql
+create table orders (
+    id int primary key auto_increment,
+    item_id int,
+    amount int,
+    unit_price decimal(12, 4),
+    total_price decimal(12, 4),
+    description varchar(2000),
+    picture varbinary(100000),
+    ts timestamp default now()
+);
+```
diff --git "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json" "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
index 096f1eb012bfdbae82ada0d3f5fca2adf147c8d7..0c53be6d446570862f9fe87116a069cdb059fd3a 100644
--- "a/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
+++ "b/data/1.MySQL\345\210\235\351\230\266/4.\346\225\260\346\215\256\347\261\273\345\236\213/4.\344\272\214\350\277\233\345\210\266\345\255\227\347\254\246\344\270\262\347\261\273\345\236\213/config.json"
@@ -1,8 +1,10 @@
 {
   "node_id": "mysql-ec8f22f2c63a4f27bd12815644d0f3db",
-  "keywords": [],
+  "keywords": ["binary", "blob", "二进制"],
   "children": [],
-  "export": [],
+  "export": [
+    "binary.json"
+  ],
   "keywords_must": [],
   "keywords_forbid": [],
   "group": 0