mysql sql语句总结

create database mytest default charset=utf8 //创建数据库 
create table users //创建表 
( 
user_id int not null auto_increment, 
user_name varchar(20) not null, 
description varchar(200), 
primary key PK_userid(user_id) 
); 
show create table users;//查看创建表的sql语句 
desc users; //查看表结构 
alter table users add(user_age int not null); //添加表字段 
insert into users(user_name,description,user_age) values('chen','this is good men.',28); //插入一条数据 
//查询数据库 
select * from users limit 5; //查询前5条 
SELECT * FROM users LIMIT 6,2; //从弟6条开始，查2条