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mysql的子查询

select id,name,age,sex,punch1from test0where id in --等号改成in(select id from test1where flag = 0 );

我做了测试(select admin_type from cool_admin where admin_name ='admin')的结果是id 但是select (select admin_type from cool_admin where admin_name ='admin') from `tk_team` left join tk_user using(id)的结果为: select id from `tk_t...

1、where型子查询 (把内层查询结果当作外层查询的比较条件) #不用order by 来查询最新的商品 select goods_id,goods_name from goods where goods_id = (select max(goods_id) from goods); #取出每个栏目下最新的产品(goods_id唯一) select c...

mysql 删除可以用子查询。 mysql删除子查询中的记录语句: Sql代码 delete from t_5star where locationid in ( select e.locationid from ( select a.* from t_5star as a , t_als_data as b where a.term = b.term ) e ) 关键是子查询中的语句...

update film set f_price=(select f_price*2 from film where f_id=5) where f_actor='甄子丹';

这样的语句是不能正确执行的。 select * from table where id in (select id from table limit 10); 但是,只要你再来一层就行。。如: select * from table where id in (select t.id from (select * from table limit 10)as t)

select a.id from 表1 a ,(select p_id from 表2 ) b where a.id in b.p_id 试试

mysql> select * from score_t;+----------+--------+----------+-------+| name | sub_id | sub_name | score |+----------+--------+----------+-------+| haiyan | 1 | 语文 | 99 || 3306 | 1 | 语文 | 50 || 村上春树 | 1 | 语文 | 80 || 雨...

举个例子: DELIMITER $$ CREATE DEFINER=`root`@`localhost` PROCEDURE `Select_bad`() BEGIN select id,name,age,sex,punch1 from test0 where id = ( select id from test1 where flag = 0 ); END 查询语句: select id,name,age,sex,punch1 ...

!FIND_IN_SET

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