带有大小写的SQL Server子查询

Question

我有以下sql：

    select * from 
    ( 
         select p.ID, 
         Received = (select Rec from Exp   
                     where EstAmt = (select MAX(ex.EstAmt) from Exp ex 
                                     where ex.Prot = p.ID and EstAmt > 0) 
                    )    

   From Prot  
   ) subsel 
   where Received = 1 

我想对接收到的数据进行处理，因此如果它为1，则说“是”，否则说“否”。 我知道该怎么办，但在这种情况下不知道，因为我收到了这是一个子查询。

我尝试了以下操作，但是没有用

     select * from 
     ( 
       select p.ID, 

       case Received = (select Rec from Exp   
                        where EstAmt = (select MAX(ex.EstAmt) from Exp ex 
                                        where ex.Prot = p.ID and EstAmt > 0) 
                  )    
      when 1 then 'Yes'
      else 'No'
      end Received
      From Prot  
     ) subsel 
    where Received = 1 

Answer 1

代替

case Received = (select Rec from Exp   
                        where EstAmt = (select MAX(ex.EstAmt) from Exp ex 
                                        where ex.Prot = p.ID and EstAmt > 0) 
                  )  

尝试：

case (select Rec from Exp   
                            where EstAmt = (select MAX(ex.EstAmt) from Exp ex 
                                            where ex.Prot = p.ID and EstAmt > 0) 
                      )  

其他答案也很重要，但是您不能将子查询的值分配给Received，只能在“ case”之后使用单个值，并确保子查询不返回多个值。

Answer 2

我认为您需要在“结束”之后删除“已接收”。 IE浏览器。 更改：

when 1 then 'Yes'
else 'No'
end Received

至

when 1 then 'Yes'
else 'No'
end

Answer 3

就像在过滤器中一样，在子查询之外获取这种case ：

    select subsel.ID,
    case subsel.Received 
      when 1 then 'Yes'
      else 'No'
    end Received 
    from 
    ( 
         select p.ID, 
         Received = (select Rec from Exp   
                     where EstAmt = (select MAX(ex.EstAmt) from Exp ex 
                                     where ex.Prot = p.ID and EstAmt > 0) 
                    )    

   From Prot  
   ) subsel 
   where Received = 1