表数据常见操作

插入数据

1、普通插入

insert into user values('01','fei','table-ball','23');

2、指定插入

insert into user(id,name,hobby) values('02','fei','football');

3、多条插入

insert into user(id,name,hobby) values('03','fei','speak'),('08','fei','papa')；

4、set插入

insert into user set id='9',name='sheng',age='24';

5、批量插入

insert into user(id,name) select id,name from Fuser where age>24

更新数据

update user set name='gege',age='99' where id=1;

删除数据

1、删除单条

delete from user where id=9;

2、删除全部

truncate table user;

查询数据

1、简单查询

select * from user;

2、NULL查询

select * from user where hobby is NULL and age is not NULL;

3、in查询

select * from user where age in('22','23','24');

4、between and查询

select * from user where age between 21 and 55;

5、or查询

select * from user where age=22 or age=23

6、order by查询

select * from user order by age asc; 升序
select * from user order by age desc; 降序

7、group by查询

select name,sum(age) from user group by name

8、内连接查询

select u.id,f.name from user u inner join user f on u.id=f.id; 推荐
select u.id,f.name from user u,user f where u.id=f.id;

9、外连接查询

select u.id,f.name from user u left join user f on u.id=f.id;

10、exists子查询

select * from user u where exists (select 1 from user f where u.name=f.name and u.age>30);

11、in子查询

select * from user where id in(select id from user where age>30);

12、distinct子查询

select distinct * from user where id in(select id from user where age>30);

13、any子查询：满足任意一个就行

select * from user where age>=any(select age from user where age>30);

14、all子查询：满足所用的即可

select * from user where age>=all(select age from user where age>30);

15、union查询：去除重复的行

select name from user union select name from user;

16、union all查询：保留重复的行

select name from user union all select name from user;

17、字段别名查询

select name myname from user;

18、正则表达式查询：查询以ang结尾的记录

select name from user where name REGEXP 'ang$';

19、模糊查询

1、_:任意一个字母
2、%:任意0~n个字母
select * from user where name like '_强胜'

20、分页查询

select * from user order by id limit 100,3