SQL多表连接语句 表 A 和 表 B 通过ID连接表A的一条记录对应表B多条记录select A.ID,A.a,A.b,B.c,B.D from A inner join B on A.ID=B.ID 只需要取B表中一条记录 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 select A.ID,A.a,A.b,B.c,B.D from A inner join (select id,max(c) as c,max(d) as d from b group by id) B on A.ID=B.ID select A.id , A.A , T.C , T.D from A,(select t.* from B m where C = (select min(C) from B where ID = m.ID)) Twhere A.id = T.id select A.ID,A.a,A.b,max(B.c)as c ,max(B.D) as d from A inner join B on A.ID=B.IDgroup by a.id,a.a,a.b select A.ID,A.a,A.b,B.c,B.D from A inner join ( select id,c,d from b tp where not exists(select 1 from b where tp.id = id and c>tp.c) B on A.ID=B.ID select A.ID,A.a,A.b,B.c,B.D from A inner join B on A.ID=B.IDwhere exists (select 1 from b where a=a.a and id<a.id) 这样的统计如何写? 如何將查詢快速的導出為一個資料表. 非常非常郁闷的问题.跪求!! 动态存储过程 在存储过程和sql中有没有for循环? sql数据库导出 为什么 round(56/1.05/10.6)的值为5而不是50呢,要怎样才可以等于50? 十万火急!!!一个word 文档怎么存入sql 2000 中,应该属于哪种数据类型.??? 大蝦們好﹐我中大獎了﹐哈哈。。來者有紅包拿 DB2问题:DB2里的表建和不建索引关系大不大? 简单的SQL语句问题 mssql2000日志能否记录每次的sql操作?
from A inner join
(select id,max(c) as c,max(d) as d from b group by id) B on A.ID=B.ID
select A.id , A.A , T.C , T.D from A,
(select t.* from B m where C = (select min(C) from B where ID = m.ID)) T
where A.id = T.id
from A inner join B on A.ID=B.ID
group by a.id,a.a,a.b
from A inner join
( select id,c,d
from b tp
where not exists(select 1 from b where tp.id = id and c>tp.c) B
on A.ID=B.ID
where exists (select 1 from b where a=a.a and id<a.id)