選擇具有兩個字段的dstinct值的行

Question

請原諒我的標題。我有這樣一個表：

將有成千上萬行的，現在我要選擇具有相同GROUP_ID但vr_debit和vr_credit值不能等於行：圖像中即;,如圖所示，沒有任何行滿足這個標準。如果有兩行，例如（6,500.000,0）和（6,0,600.000），我希望它們作爲結果。希望你明白這個主意。

謝謝。

Answer 1

使用SUM()計算每個組，這是一個聚合函數，並使用HAVING子句進行過濾。

SELECT GROUP_ID, SUM(vr_debit) totalDebit, SUM(vr_credit) totalCredit 
FROM TableName 
GROUP BY GROUP_ID 
HAVING SUM(vr_debit) <> SUM(vr_credit) 

如果你想獲得未計算的行，你可以加入它的子查詢。

SELECT a.* 
FROM TableName a 
     INNER JOIN 
     (
      SELECT GROUP_ID 
      FROM TableName 
      GROUP BY GROUP_ID 
      HAVING SUM(vr_debit) <> SUM(vr_credit) 
     ) b ON a.GROUP_ID = b.GROUP_ID 

• SQLFiddle Demo (for both queries)

Answer 2

也許：

SELECT group_ID, 
     vr_debit, 
     vr_credit 
FROM 
    dbo.TableName T1 
WHERE 
    EXISTS(
     SELECT 1 FROM dbo.TableName T2 
     WHERE T1.group_ID = T2.group_ID 
     AND T1.vr_debit <> T2.vr_debit 
     AND T1.vr_credit<> T2.vr_credit 
     AND T1.vr_debit <> T2.vr_credit 
    ) 

Answer 3

您也可以使用此選項

SELECT * 
FROM dbo.test64 t 
WHERE EXISTS (
       SELECT 1 
       FROM dbo.test64 t2 
       WHERE t.group_id = t2.group_id 
       HAVING SUM(t2.vr_debit) - SUM(t2.vr_credit) != 0 
      ) 

演示上SQLFiddle