如何更新基於條件

Question

一個SQL數據庫表我有一個插入值從表到另一個表的存儲過程，見下圖：

USE [DB] 
GO 

SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
       CREATE PROCEDURE [dbo].[InsertAverageRunTimings] 

        (
         @LatesVersionTested varchar(50) = NULL 
        ) 
       AS 
       BEGIN 
        INSERT INTO TestingToolTestPerfomanceBenchmark(LatestVersionTested, TestCode, TestSequence, AverageRuntime) 
        SELECT LatestVersionTested, TestCode, TestSequence, AverageRuntime 
        FROM #temptable2 
        WHERE LatestVersionTested NOT IN (SELECT LatestVersionTested FROM TestingToolTestPerfomanceBenchmark) 

    END 

Temptable2和TestingToolTestPerfomanceBenchmark有這樣的信息：

LatestVersionTested TestSequence AverageRuntime 
3.21 - 48 Update 78 1     5.34 
3.21 - 48 Update 78 15    6.32 
3.21 - 48 Update 78 16    5.93 
3.21 - 48 Update 78 17    21.09 
3.21 - 48 Update 78 18    0.64 
3.21 - 48 Update 78 19    0.15 
3.21 - 48 Update 78 20    0.12 
3.21 - 48 Update 78 21    0.12 
3.21 - 48 Update 78 22    0.91 
3.21 - 48 Update 78 25    13.93 
3.21 - 48 Update 95 1     1.40 
3.21 - 48 Update 95 15    0.74 
3.21 - 48 Update 95 16    1.27 
3.21 - 48 Update 95 17    5.27 
3.21 - 48 Update 95 18    3.62 
3.21 - 48 Update 95 19    2.53 
3.21 - 48 Update 95 20    2.52 
3.21 - 48 Update 95 21    2.33 
3.21 - 48 Update 95 22    0.61 
3.21 - 48 Update 95 25    2.05 
3.21 - 48 Update 93 1     1.58 
3.21 - 48 Update 93 15    0.85 
3.21 - 48 Update 93 16    1.45 
3.21 - 48 Update 93 17    5.18 
3.21 - 48 Update 93 18    3.48 
3.21 - 48 Update 93 19    2.50 
3.21 - 48 Update 93 20    2.48 
3.21 - 48 Update 93 21    2.16 
3.21 - 48 Update 93 22    0.70 
3.21 - 48 Update 93 25    2.36 

如果在TestingToolTestPerfomanceBenchmark表中的LatestVersionTested列中未找到temptable2中LatestVersionTested列中的值，則存儲過程將插入這些值。

我想實現的是，如果LatestVersionTested兩個表中是相同的，在temptable2的AverageRuntime值必須更換AverageRuntime在TestingToolTestPerfomanceBenchmark表中的值

如何修改我的存儲過程來實現這一目標？

Answer 1

CREATE PROCEDURE [dbo].[InsertAverageRunTimings] 

(
@LatesVersionTested varchar(50) = NULL 
) 
AS 
BEGIN 

    IF EXISTS (SELECT LatestVersionTested FROM TestingToolTestPerfomanceBenchmark WHERE LatestVersionTested= @LatesVersionTested) 
    BEGIN 
    UPDATE TestingToolTestPerfomanceBenchmark SET AverageRuntime= a.AverageRuntime 
    FROM #temptable2 a 
    WHERE LatestVersionTested =@LatesVersionTested 

    END ELSE BEGIN 

    INSERT INTO TestingToolTestPerfomanceBenchmark(LatestVersionTested, TestCode, TestSequence, AverageRuntime) 
    SELECT LatestVersionTested, TestCode, TestSequence, AverageRuntime 
    FROM #temptable2 
    WHERE LatestVersionTested = @LatesVersionTested 

    END 

END 

Answer 2

如果你的存儲過程插入你需要的所有記錄，那麼不應該有任何兩個都不存在。

然而，你不得不看看最新版本，因爲它不是唯一的，但最新版本和測試序列的組合。

您在INSERT中沒有考慮測試序列，難道只有一次插入版本測試序列？

如果是真的，你可以這樣做：

CREATE PROCEDURE [dbo].[InsertAverageRunTimings] 

    @LatesVersionTested varchar(50) = NULL 

    AS 
    BEGIN 

     /*Insert missing records*/ 
     INSERT INTO TestingToolTestPerfomanceBenchmark 
      ( 
       LatestVersionTested, 
       TestCode, 
       TestSequence, 
       AverageRuntime 
      ) 
     SELECT LatestVersionTested, 
       TestCode, 
       TestSequence, 
       AverageRuntime 
     FROM #temptable2 
     WHERE LatestVersionTested NOT IN 
     (
      SELECT LatestVersionTested 
      FROM TestingToolTestPerfomanceBenchmark 
     ) 
     /*Update the records so the runtimes match as all records are now inserted*/ 
     UPDATE  PB 
     SET   PB.AverageRuntime     = T2.AverageRunTime 
     FROM  TestingToolTestPerfomanceBenchmark AS PB 
     INNER JOIN #TempTable2       AS T2 ON PB.LatestVersionTested = T2.LatestVersionTested AND PB.TestSequence  = T2.TestSequence 
     WHERE  PB.AverageRuntime     <> T2.AverageRuntime; 


    END