# 查看所有表
show tables
# 查看表结构
desc <tablename>
# 删除表
drop tables <tablename>
# 创建表
create table user(
id INT NOT NULL AUTO_INCREMENT,
username VARCHAR(100) NOT NULL,
mobile VARCHAR(40) NOT NULL,
PRIMARY KEY ( id )
);
# 插入语句
insert into user(username,mobile) values('wlj','15501686403');