sql single table operation

Foreplay - Create a table

create table xxx(

id int unsigned not null auto_increment primary key,

name varchar(20) not null

);

 

 

 

1. increase

- the whole field into

insert into xxx values ​​(0, "catch");

 

- field interpolation

insert into xxx (name) values ​​( "Wang Lao six");

 - Multi-row insert

insert into xxx (name) values ​​( "Wang Lao six"), ( "King Seven"), ( "Wang eight");

 

 

 

 

2. deleted

delete from xxx where id=1;

 

 

 

 

3. change

update xxx set name="张三",  where id=3;

 

 

 

4 check

 select * from xxx; to see all data

select *from xxx where id>3;

select * from xxx where name = "Wong Lo Six";