按選擇列表中的一列進行分組-SQL

Question

是由a.MEMB進行分組的一種方式嗎？我研究了它並找到了一些解決方法，但似乎無法使其發揮作用。我不想對其他coolumns中的whats感興趣，但我確實需要在結果中顯示它們。

;with main as (SELECT a.MEMB 
    , ta.DRAW 
    , ta.foc 
    , a.ENTRY 
    , tc.DESCRIP 

    FROM a with (nolock) 
      inner join tal  
    inner join ta  
     inner join tc   
    WHERE a.ENTRY between @start and @end 
    and a.TRAN != 0 
    and tc.TRANN=a.TRANN 
    and tc.TRANT=a.TRANT 
) 

Answer 1

您可以使用ROW_NUMBER()來分區數據。但是，您的查詢目前不會正常工作，因爲您缺少連接

;with main as 
(SELECT a.MEMB, ta.DRAW, ta.foc, a.ENTRY, tc.DESCRIP, 
     row_number() over (partition by a.MEMB order by a.Memb) rn 
FROM a with (nolock) 
inner join tal on ... 
inner join ta on ...  
inner join tc  on tc.TRANN=a.TRANN 
    and tc.TRANT=a.TRANT 
    WHERE a.ENTRY between @start and @end 
    and a.TRAN != 0 
) 
    select * from main where rn = 1