将两个查询合并到一个子查询中

Question

我想将以下两个查询合并为一个子查询中的一个查询。 首先查询：

Select Match_ref, WBE Into Match_ref_Confilct 
From RAW_MWBE 
where WBE="p" or WBE="n" 
group by Match_ref, WBE 

第二个查询：

Select Match_ref, count(Match_ref) 
from Match_ref_conflict 

这样做的目的是与出现不止一次，因此具有的信息冲突match_refs的列表结束。 我想这没有成功：

Select match_Ref, count(match_ref) 
From RAW_MWBE 
where Exists(Select match_ref, WBE 
from RAW_MWBE 
where WBE like "P" or WBE like "N") 
group by match_ref, WBE 
having Count(Match_ref)>1 

访问SQL

Answer 1

您可以大大简化你想要做什么：

Select Match_ref, count(Match_ref) 
from RAW_MWBE 
where WBE in ("p", "n") 
group by Match_Ref 
having min(WBE) <> max(WBE); 

，因为你似乎这不使用count()关心“p”和“n”是否一起发生（根据您的查询示例）。

Answer 2

Select Match_ref, count(*) as cnt 
From RAW_MWBE 
where WBE="p" or WBE="n" 
group by Match_ref 
having count(*) > 1