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基本 sql 练习

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flykhan 2023-08-24 17:18:04 +08:00
parent 8b63cc049a
commit db9e1dd070
14 changed files with 275 additions and 0 deletions
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171
day9/backup.sql Normal file
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-- MySQL dump 10.13 Distrib 5.7.33, for Linux (x86_64)
--
-- Host: localhost Database: studb
-- ------------------------------------------------------
-- Server version 5.7.33-0ubuntu0.16.04.1
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
--
-- Table structure for table `t_course`
--
DROP TABLE IF EXISTS `t_course`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_course` (
`cid` int(11) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL COMMENT '课程名',
`tid` int(11) DEFAULT NULL COMMENT '教师编号'
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_course`
--
LOCK TABLES `t_course` WRITE;
/*!40000 ALTER TABLE `t_course` DISABLE KEYS */;
/*!40000 ALTER TABLE `t_course` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t_emp`
--
DROP TABLE IF EXISTS `t_emp`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_emp` (
`emp_id` int(11) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL,
`tel` char(11) DEFAULT NULL,
`salary` decimal(10,2) DEFAULT NULL,
`hire_date` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_emp`
--
LOCK TABLES `t_emp` WRITE;
/*!40000 ALTER TABLE `t_emp` DISABLE KEYS */;
INSERT INTO `t_emp` VALUES (1,'jack','17189792205',13000.00,'2021-10-12'),(2,'lucy','17178982206',3200.00,'2022-11-15'),(3,'disen','17178979385',23000.00,'2022-10-12');
/*!40000 ALTER TABLE `t_emp` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t_score`
--
DROP TABLE IF EXISTS `t_score`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_score` (
`sid` int(11) DEFAULT NULL,
`cid` int(11) DEFAULT NULL,
`score` decimal(5,2) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_score`
--
LOCK TABLES `t_score` WRITE;
/*!40000 ALTER TABLE `t_score` DISABLE KEYS */;
/*!40000 ALTER TABLE `t_score` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t_stu`
--
DROP TABLE IF EXISTS `t_stu`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_stu` (
`sid` int(11) DEFAULT NULL,
`name` varchar(20) DEFAULT NULL,
`sex` varchar(2) DEFAULT NULL,
`birthday` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_stu`
--
LOCK TABLES `t_stu` WRITE;
/*!40000 ALTER TABLE `t_stu` DISABLE KEYS */;
INSERT INTO `t_stu` VALUES (1,'张三','女','1990-12-28'),(2,'王龙','男','1991-01-07'),(3,'刘冬冬','女','1992-08-21'),(4,'刘红','男','1998-02-15'),(5,'王玉玉','女',NULL);
/*!40000 ALTER TABLE `t_stu` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t_stu3`
--
DROP TABLE IF EXISTS `t_stu3`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_stu3` (
`sid` int(11) DEFAULT NULL,
`name` varchar(20) DEFAULT NULL,
`sex` varchar(2) DEFAULT NULL,
`birthday` date DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_stu3`
--
LOCK TABLES `t_stu3` WRITE;
/*!40000 ALTER TABLE `t_stu3` DISABLE KEYS */;
INSERT INTO `t_stu3` VALUES (1,'张三','女','1990-12-28'),(3,'刘冬冬','女','1992-08-21'),(5,'王玉玉','女',NULL);
/*!40000 ALTER TABLE `t_stu3` ENABLE KEYS */;
UNLOCK TABLES;
--
-- Table structure for table `t_tch`
--
DROP TABLE IF EXISTS `t_tch`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `t_tch` (
`tid` int(11) DEFAULT NULL,
`name` varchar(50) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
/*!40101 SET character_set_client = @saved_cs_client */;
--
-- Dumping data for table `t_tch`
--
LOCK TABLES `t_tch` WRITE;
/*!40000 ALTER TABLE `t_tch` DISABLE KEYS */;
/*!40000 ALTER TABLE `t_tch` ENABLE KEYS */;
UNLOCK TABLES;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
-- Dump completed on 2023-08-24 17:01:50

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day9/create_course.sql Normal file
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-- comment 表示字段的说明 (备份)
create table t_course(
cid int,
name varchar(50) comment '课程名',
tid int comment '教师编号'
);

10
day9/create_employee.sql Normal file
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use studb;
-- 员工表
create table t_emp(
emp_id int,
name varchar(50),
tel char(11),
salary decimal(10,2),
hire_date date
);

5
day9/create_score.sql Normal file
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create table t_score(
sid int,
cid int,
score decimal(5,2)
);

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day9/create_stu.sql Normal file
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-- sql comment
create table t_student(
sid int,
name varchar(20),
sex varchar(2),
birthday date
);

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day9/create_teacher.sql Normal file
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create table t_teacher(
tid integer,
name varchar(50)
);

4
day9/delete_employee.sql Normal file
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use studb;
delete from t_emp where hire_date > '2022-12-31';
select * from t_emp;

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day9/delete_students.sql Normal file
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-- 删除测试
use studb;
create table if not exists t_stu3
select * from t_stu;
delete from t_stu3
where sex='男';

10
day9/insert_employee.sql Normal file
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use studb;
insert into t_emp values
(1,'jack','17189792205',12000,'2021-10-12'),
(2,'lucy','17178982206',2200,'2022-11-15'),
(3,'disen','17178979385',22000,'2022-10-12'),
(4,'mack','17178982209',5000,'2023-08-15'),
(5,'judy','17178982105',9000,'2023-08-20');
select * from t_emp;

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day9/insert_students.sql Normal file
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-- 单条数据插入
insert into t_stu values(1,'张三','男','1991-01-15');
-- 按照指定格式插入
insert into t_stu(sid,name,birthday,sex)
values(2,'王龙','1990-12-18','男');
-- 元组插入
insert into t_stu values
(3,'刘冬冬','女','1992-08-21'),
(4,'刘红','女','1992-05-19'),
(5,'王玉玉','女','1991-08-12');

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day9/search_employee.sql Normal file
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use studb;
select * from t_emp where salary>5000;

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day9/search_students.sql Normal file
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-- 查询测试
-- select * from t_stu where name like '刘';
select * from t_stu where name like '刘%';
select * from t_stu where birthday like '1991%';

10
day9/update_employee.sql Normal file
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use studb;
update t_emp
set salary = salary + 1000;
update t_emp
set salary = salary * 1.15
where tel like '%8979$';
select * from t_emp;

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day9/update_students.sql Normal file
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-- 修改测试
update t_stu
set sex='男',birthday='1998-02-15'
where name = '刘红';
update t_stu
set sex='女',birthday='1990-12-28'
where sid = 1;
update t_stu
-- set birthday=CURDATE()
set birthday=null
where sid = 5;
/*
update t_stu
-- 使用函数加 5 天
set birthday = DATE_ADD(birthday,INTERVAL 5 DAY)
where sid = 2;
*/