标签:结果 style max sel alt image lin 技术分享 app
子查询在()中写sql语句
1.单列子查询
查询一列中的一个值。
select * from table
where 列1 = (select 列1 from table where 列3 = 值)
and 列2=(select 列2 from table where 列3 = 值 )
2.单行子查询
查询出多列
select t1.列1,t2.列2,t3.列3 from table1 t1, (select 列2 from table t2 group by 列2) ,table3 t3
where t1.列5=t2.列5 and t2.列4=t3.列6;
3.多行子查询
查询多条记录数据
in 主查询语句结果在子查询语句
select * from table where 列1 in (select max(列1) from table group by 列2 );
any
select * from table where 列1 = any (select max(列1) from table group by 列2 );
all 主查询语句的结果大于或小于子查询语句的结果
select * from table where 列1 = any (select max(列1) from table group by 列2 );
标签:结果 style max sel alt image lin 技术分享 app
原文地址:https://www.cnblogs.com/topzhangRX/p/10111655.html