“插入選擇”寫入表，但包含從同一表讀取的子查詢

Question

我正在使用“插入選擇”將記錄添加到我的表“ SampleTestLimits”中，但是該記錄還具有從同一表讀取的子查詢，可以為我執行計數。

我認為子查詢沒有看到我的“插入選擇”添加的早期記錄。 Oracle和SQL Server相同。 SQL Server的代碼如下所示（我的子查詢以“ SELECT COALESCE ...”開頭）。

我有另一個在類似情況下也可以工作的存儲過程。

如果有人能告訴我我在做什么，請多多關照。

ALTER PROCEDURE [dbo].[CreateSampleTestLimits]
@SampleCode as NVARCHAR(80),
@TestPosition as smallint,
@TestCode NVARCHAR(20),
@TestVersion smallint,
@EnterDate as integer,
@EnterTime as smallint,
@EnterUser as NVARCHAR(50)
AS
BEGIN
INSERT INTO SampleTestLimits
([AuditNumber]
,[LimitNumber]
,[ComponentRow]
,[ComponentColumn]
,[ComponentName]
,[TestPosition]
,[SampleCode]
,[AuditFlag]
,[LimitSource]
,[LimitType]
,[UpperLimitEntered]
,[UpperLimitValue]
,[LowerLimitEntered]
,[LowerLimitValue]
,[LimitTextColour]
,[LimitPattern]
,[LimitForeColour]
,[LimitBackColour]
,[CreatedDate]
,[CreatedTime]
,[CreatedUser]
,[LimitText]
,[FilterName]
,[deleted]
,IsRuleBased)
SELECT 1 --starting auditnumber
,(SELECT COALESCE(MAX(LimitNumber), 0) + 1 AS NextLimitNumber FROM SampleTestLimits WHERE SampleCode=@SampleCode AND TestPosition=@TestPosition AND ComponentRow=1 AND ComponentColumn=1 AND AuditFlag=0) -- TFS bug# 3952: Calculate next limit number.
,ComponentRow
,ComponentColumn
,(select ComponentName from TestComponents TC where TC.TestCode=@TestCode and TC.ComponentColumn=TestLimits.ComponentColumn and TC.ComponentRow = TestLimits.ComponentRow and TC.AuditNumber=TestLimits.AuditNumber)
,@TestPosition
,@SampleCode
,0 --auditflag
,1 --limitsource = test
,[LimitType]
,[UpperLimitEntered]
,[UpperLimitValue]
,[LowerLimitEntered]
,[LowerLimitValue]
,[LimitTextColour]
,[LimitPattern]
,[LimitForeColour]
,[LimitBackColour]
,@EnterDate
,@EnterTime
,@EnterUser
,[LimitText]
,[FilterName]
,0 --deleted
,0 --rule based
FROM TestLimits join Tests on Tests.TestCode=TestLimits.TestCode and Tests.AuditNumber= TestLimits.AuditNumber  WHERE Tests.TestCode=@TestCode and Tests.auditnumber=@TestVersion and ([TestLimits].FilterString is null or DATALENGTH([TestLimits].FilterString)=0)
END

Answer 1

假設我正確理解了您的邏輯（即您希望將nextlimitnumber對要添加的每一行增加1），在Oracle中，我將通過使用解析函數row_number（）來計算要添加的數字先前的最大值，例如：

INSERT INTO sampletestlimits (auditnumber,
                              limitnumber,
                              componentrow,
                              componentcolumn,
                              componentname,
                              testposition,
                              samplecode,
                              auditflag,
                              limitsource,
                              limittype,
                              upperlimitentered,
                              upperlimitvalue,
                              lowerlimitentered,
                              lowerlimitvalue,
                              limittextcolour,
                              limitpattern,
                              limitforecolour,
                              limitbackcolour,
                              createddate,
                              createdtime,
                              createduser,
                              limittext,
                              filtername,
                              deleted,
                              isrulebased)
  SELECT 1, --starting auditnumber
         (SELECT COALESCE (MAX (limitnumber), 0) + 1 AS nextlimitnumber
          FROM   sampletestlimits
          WHERE      samplecode = p_samplecode
                 AND testposition = p_testposition
                 AND componentrow = 1
                 AND componentcolumn = 1
                 AND auditflag = 0)
           + row_number() over (partition by testposition, componentrow, componentcolumn, auditflag) as nextlimitnumber, -- TFS bug# 3952: Calculate next limit number.
         componentrow,
         componentcolumn,
         (SELECT componentname
          FROM   testcomponents tc
          WHERE      tc.testcode = p_testcode
                 AND tc.componentcolumn = testlimits.componentcolumn
                 AND tc.componentrow = testlimits.componentrow
                 AND tc.auditnumber = testlimits.auditnumber),
         p_testposition,
         p_samplecode,
         0, --auditflag
         1, --limitsource = test
         limittype,
         upperlimitentered,
         upperlimitvalue,
         lowerlimitentered,
         lowerlimitvalue,
         limittextcolour,
         limitpattern,
         limitforecolour,
         limitbackcolour,
         p_enterdate,
         p_entertime,
         p_enteruser,
         limittext,
         filtername,
         0, --deleted
         0  --rule based
  FROM   testlimits
         JOIN tests
           ON     tests.testcode = testlimits.testcode
              AND tests.auditnumber = testlimits.auditnumber
  WHERE      tests.testcode = p_testcode
         AND tests.auditnumber = p_testversion
         AND (   testlimits.filterstring IS NULL
              OR datalength (testlimits.filterstring) = 0);

我不得不猜測partition by子句需要包含什么-根據您的要求進行必要的調整。