MySql學習--第一天

採用navicat客戶端

1.建立數據庫demo

CREATE DATABASE demo;

2.刪除數據庫demo

DROP DATABASE demo;

3.建立數據庫後能夠查看mysql數據庫中的數據庫

SHOW DATABASES;

4.建立數據庫後，指定demo數據庫

USE demo;

5.在數據庫demo中，建立student表

CREATE TABLE student(
id int unsigned primary key,
name VARCHAR(20) not null,
sex char(1) not null,
birthday DATE not null,
tel char(11) not null,
remark VARCHAR(200)
);

6.向student表插入一條數據

INSERT INTO student VALUES(1,"李強","男","1995-05-15","13312345678",null);

7.向student表添加字段

ALTER TABLE student
ADD address VARCHAR(200) NOT NULL,
ADD home_tel CHAR(11) NOT NULL;

8.修改字段類型和約束

ALTER TABLE student MODIFY home_tel VARCHAR(20) NOT NULL;

9.修改字段名稱

ALTER TABLE student CHANGE address home_address VARCHAR(200) NOT NULL;

10.刪除字段

ALTER TABLE student DROP home_tel;