sqlquery4.sql

经典的SOL面试题,涵盖了数据库各个层面的问题和答案。

/*
use test
go
create table score (fid int identity(1,1),fclass int, fsscore int)
*/


select b.fclass,max(b.fsscore) from  
( 
select * from score 
where fclass in (select fclass from score group by fclass having count(*)>30) 
) b 
group by b.fclass 


select * from score 

select max(fid) afid,max(fsscore) afsscore,fclass from score where fclass in(
select fclass from score group by fclass having count(*)>30)
group by fclass