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2207/MySQL数据库操作综合练习题答案.md
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### 练习一 ### 练习一
**1** ![image-20250315225248590](https://yp.smallkun.cn/markdown/image-20250315225248590.png!compress)
```sql ```sql
#(1)创建数据库 #(1)创建数据库
@ -30,7 +30,7 @@ ALTER TABLE customers RENAME TO customers_info;
ALTER TABLE customers_info DROP c_city; ALTER TABLE customers_info DROP c_city;
``` ```
**2** ![image-20250315225304324](https://yp.smallkun.cn/markdown/image-20250315225304324.png!compress)
```sql ```sql
#(1)创建表时 添加外键约束并指定外键约束名称 #(1)创建表时 添加外键约束并指定外键约束名称
@ -51,6 +51,10 @@ DROP TABLE orders;
### 练习二 ### 练习二
![image-20250315225318753](https://yp.smallkun.cn/markdown/image-20250315225318753.png!compress)
![image-20250315225328264](https://yp.smallkun.cn/markdown/image-20250315225328264.png!compress)
```sql ```sql
#(1)创建表、插入记录 #(1)创建表、插入记录
CREATE TABLE pet( CREATE TABLE pet(
@ -86,6 +90,10 @@ TRUNCATE pet;
### 练习三 ### 练习三
![image-20250315225417117](https://yp.smallkun.cn/markdown/image-20250315225417117.png!compress)
![image-20250315225431297](https://yp.smallkun.cn/markdown/image-20250315225431297.png!compress)
```sql ```sql
#1.创建数据库 #1.创建数据库
CREATE DATABASE test_compay DEFAULT CHARACTER SET utf8; CREATE DATABASE test_compay DEFAULT CHARACTER SET utf8;
@ -115,24 +123,110 @@ CREATE TABLE salary(
ALTER TABLE salary ADD CONSTRAINT fk_sal_eid FOREIGN KEY(empid) ALTER TABLE salary ADD CONSTRAINT fk_sal_eid FOREIGN KEY(empid)
REFERENCES employee(empid) ON UPDATE CASCADE ON DELETE CASCADE; REFERENCES employee(empid) ON UPDATE CASCADE ON DELETE CASCADE;
#4插入记录 #4插入记录
INSERT INTO department() INSERT INTO department (depid, depname, deinfo)
VALUES VALUES
(111, '生产部', NULL), (111, '生产部', NULL),
(222, '销售部', NULL), (222, '销售部', NULL),
(333, '人事部', NULL); (333, '人事部', NULL),
(444, '财务部', '负责公司财务管理'),
(555, '技术部', '负责技术研发与支持'),
(666, '市场部', '负责市场推广与品牌建设'),
(777, '客服部', '负责客户服务与支持'),
(888, '采购部', '负责公司物资采购'),
(999, '法务部', '负责公司法律事务'),
(1010, '行政部', '负责公司日常行政管理'),
(1011, '研发部', '负责新产品研发'),
(1012, '培训部', '负责员工培训与发展');
INSERT INTO employee() INSERT INTO employee (empid, name, sex, title, birthday, depid)
VALUES VALUES
(1001, '张三', '男', '高级工程师', '1975-1-1', 111), (1001, '张三', '男', '高级工程师', '1975-1-1', 111),
(1002, '李四', '女', '助工', '1985-1-1', 111), (1002, '李四', '女', '助工', '1985-1-1', 111),
(1003, '王五', '男', '工程师', '1978-11-11', 222), (1003, '王五', '男', '工程师', '1978-11-11', 222),
(1004, '赵六', '男', '工程师', '1999-1-1', 222); (1004, '赵六', '男', '工程师', '1999-1-1', 222),
(1005, '陈七', '女', '会计师', '1980-5-15', 444),
(1006, '刘八', '男', '软件工程师', '1990-8-20', 555),
(1007, '孙九', '女', '市场经理', '1985-12-25', 666),
(1008, '周十', '男', '客服专员', '1992-3-10', 777),
(1009, '吴十一', '女', '采购经理', '1988-7-22', 888),
(1010, '郑十二', '男', '法务顾问', '1983-9-30', 999),
(1011, '王十三', '女', '行政助理', '1995-4-18', 1010),
(1012, '李十四', '男', '研发工程师', '1991-11-5', 1011),
(1013, '赵十五', '女', '培训讲师', '1987-6-12', 1012),
(1014, '孙十六', '男', '技术支持', '1993-2-14', 555),
(1015, '杨十七', '女', '销售代表', '1994-8-8', 222);
INSERT INTO salary() INSERT INTO salary (empid, basesalary, titleSalary, decuction)
VALUES VALUES
(1001, 2200, 1100, 200), (1001, 2200, 1100, 200),
(1002, 1200, 200, NULL), (1002, 1200, 200, NULL),
(1003, 2900, 700, 200), (1003, 2900, 700, 200),
(1004, 1950, 700, 150); (1004, 1950, 700, 150),
(1005, 2500, 800, 100),
(1006, 3000, 1200, 250),
(1007, 2800, 1000, 200),
(1008, 1800, 300, 50),
(1009, 3200, 900, 300),
(1010, 3500, 1000, 400),
(1011, 2000, 400, 100),
(1012, 3100, 1100, 200),
(1013, 2700, 800, 150),
(1014, 2300, 700, 100),
(1015, 2600, 600, 200);
```
![image-20250315225441802](https://yp.smallkun.cn/markdown/image-20250315225441802.png!compress)
### 练习四
![image-20250315225803115](https://yp.smallkun.cn/markdown/image-20250315225803115.png!compress)
![image-20250315225818026](https://yp.smallkun.cn/markdown/image-20250315225818026.png!compress)
```sql
```
![image-20250315225829272](https://yp.smallkun.cn/markdown/image-20250315225829272.png!compress)
```sql
```
### 练习五
![image-20250315230015174](https://yp.smallkun.cn/markdown/image-20250315230015174.png!compress)
```sql
```
![image-20250315230025538](https://yp.smallkun.cn/markdown/image-20250315230025538.png!compress)
```sql
```
### 练习六
![image-20250315230057816](https://yp.smallkun.cn/markdown/image-20250315230057816.png!compress)
```sql
```
### 练习七
![image-20250315230113710](https://yp.smallkun.cn/markdown/image-20250315230113710.png!compress)
![image-20250315230128412](https://yp.smallkun.cn/markdown/image-20250315230128412.png!compress)
```sql
```
### 练习八
![image-20250315230214156](https://yp.smallkun.cn/markdown/image-20250315230214156.png!compress)
![image-20250315230227129](https://yp.smallkun.cn/markdown/image-20250315230227129.png!compress)
```sql
``` ```