基本的SQL语言

create database test;

create table user(
id int not null primary key,
name varchar(32) not null,
password varchar(32) not null);

desc user;

alter table user add sex int;

insert into user (id,name,password) values 
(001,‘a‘,‘123‘),
(002,‘b‘,‘qwe‘),
(003,‘c‘,‘zxc‘);

delete from user where id=003;            #删除指定行

delete from user;                               #删除表

alter table user drop sex;

alter table usermodify password int;

update user
set name=‘xiaoming‘,password=‘123456‘
where id=001;