刪除「等效」從兩個表

Question

數據我需要在SQL Server 2012程序執行以下僞邏輯，基於一個表變量和一個表聲明爲這樣：

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1. 對於每一行在表變量數據的@tmp
2. 從Table1刪除行，其中UserID/SgsID組合在Table1
3. 匹配UserID/SgsID刪除那些UserID/SgsID共從@tmp mbinations已經從Table1

我一直在研究不同的方法，如使用OUTPUT INTO和INTERSECT刪除，但不能寫在兩個表中刪除（其實查詢我不認爲這是甚至可能）。

我已經通過使用下面的代碼實現了上述步驟，但是，我想知道是否有任何T-SQL pro可能能夠提出更簡潔/高效的方法？

見SQLFiddle for online version

CREATE TABLE #Table1 
    (
    ID int IDENTITY(1,1), 
    UserID int NOT NULL, 
    SgsID int NOT NULL 
    ) 

INSERT INTO #Table1 (UserID, SgsID) VALUES (5, 99) 
INSERT INTO #Table1 (UserID, SgsID) VALUES (10, 89) 
INSERT INTO #Table1 (UserID, SgsID) VALUES (150, 79) 
INSERT INTO #Table1 (UserID, SgsID) VALUES (200, 69) 
INSERT INTO #Table1 (UserID, SgsID) VALUES (250, 59) 
SELECT * FROM #Table1 

DECLARE @tmp TABLE 
    (
    ID int IDENTITY(1,1), 
    UserID int NOT NULL, 
    SgsID int NOT NULL 
    ) 

INSERT INTO @tmp (UserID, SgsID) VALUES (150, 79) 
INSERT INTO @tmp (UserID, SgsID) VALUES (200, 69) 
INSERT INTO @tmp (UserID, SgsID) VALUES (250, 59) 
INSERT INTO @tmp (UserID, SgsID) VALUES (999, 49) 
SELECT * FROM @tmp 

DECLARE @tbl_commonRows TABLE (UserID int, SgsID int) 
INSERT INTO @tbl_commonRows 
    (
    UserID, 
    SgsID 
    ) 
SELECT 
    UserID, 
    SgsID 
FROM 
    #Table1 
INTERSECT 
SELECT 
    UserID, 
    SgsID 
FROM 
    @tmp 

DELETE FROM 
    #Table1 
WHERE 
    (ID IN (
     SELECT 
      ID 
     FROM 
      #Table1 t1 INNER JOIN 
      @tbl_commonRows c ON c.UserID = t1.UserID AND c.SgsID = t1.SgsID)) 

DELETE FROM 
    @tmp 
WHERE 
    (ID IN (
     SELECT 
      ID 
     FROM 
      @tmp t2 INNER JOIN 
      @tbl_commonrows c ON c.UserID = t2.UserID AND c.SgsID = t2.SgsID)) 

SELECT * FROM #Table1 
SELECT * FROM @tmp 
DROP TABLE #Table1 

Answer 1

你有看着使用合併這個？可能是另一種選擇，語法很好，易於遵循。

MERGE (Transact-SQL)

Answer 2

這裏的解決方案：

DECLARE @tmp_ids TABLE (
    id1 INT, 
    id2 INT 
) 

INSERT INTO @tmp_ids (id1, id2) 
SELECT 
    t1.id, 
    t2.id 
FROM Table1 t1 
INNER JOIN tmp t2 
    on (t1.UserID = t2.UserID AND t1.SgsID = t2.SgsID) 

DELETE FROM Table1 
WHERE id IN (SELECT id1 FROM @tmp_ids) 

DELETE FROM tmp 
WHERE id IN (SELECT id2 FROM @tmp_ids) 

請記住 - 我創建物理表tmp和表1

Answer 3

你可以採取的事實，即輸出指令可以採取比INSERTED越來越被刪列的刪除（但不插入，黯然）優勢：

DECLARE @output TABLE (id int) 

    DELETE FROM tbl 
    OUTPUT tmp.ID INTO @output(id) 
    FROM #Table1 tbl 
    JOIN @tmp tmp 
     ON tbl.UserID = tmp.UserID 
     AND tbl.SgsID = tmp.SgsID 

    DELETE FROM tmp 
    FROM @tmp tmp 
    JOIN @Output outp ON tmp.id = outp.id