MySQL自学-入门篇

入门语句：

连接数据库mysql> mysql -u root -p 

查看库：mysql> show databases;

创建库：mysql> create database test;

选择库：mysql> use test;

删除库：mysql> drop database test;

创表：

mysql> create table class (

    ->  stu int,

    ->  name varchar(20),

    ->  age int,

    ->  area varchar(20)

    ->  );

改表：mysql> rename table class to newclass;

查表：mysql> desc newclass;

删表：mysql> drop table newclass;

增删改查语句：

增：mysql> insert into msg

    -> (id,name,title)

    -> values

    -> (18,'xxx','aaa');

    Query OK, 1 row affected (0.05 sec)

删：mysql> delete from msg where id = 10;

mysql> select * from msg;

+------+------+-------+

| id   | name | title |

+------+------+-------+

|   18 | xxx  | aaa   |

+------+------+-------+

1 row in set (0.00 sec)

改：mysql> update msg

    -> set

    -> id = 19,

    -> name = 'bbb'

    -> where

    -> name ='xxx';

Query OK, 1 row affected (0.12 sec)

查：mysql> select * from msg where id > 20;

mysql> select name from msg where id = 20;