我有这个存储过程按预期工作，除了一个缺陷。在总结查询的计费部分时，我需要考虑NULL值。如果不存在值，则数据库默认为NULL，这导致我的最终计算为NULL。为了解决这个问题，我想使用COALESCE函数强制任何列返回0，如果它们被发现是NULL，那么我的计算工作正常。
目前我只在BillAdjustmentCTE CTE的AdjustFeeAmountTotal列上进行测试，因为只需在所需列上使用COALESCE函数就行了。我在下面的当前实现仍然为AdjustFeeAmountTotal列返回NULL。
任何人都知道为什么？
ALTER PROCEDURE [dbo].[GetRollCallData]
@Ids VARCHAR(255),
@LexiconId INT,
@UUID UNIQUEIDENTIFIER,
@ReadOnly INT
AS
DECLARE @TableCode INT
SET @TableCode = 58;
IF @Ids <> ''
BEGIN
EXEC InsertInSelectionCache @Ids, @UUID, @TableCode, 0
IF @ReadOnly = 1
With DOACTE AS(
SELECT ROW_NUMBER() OVER(PARTITION BY [File].Id ORDER BY CustomRecordsetId DESC) AS RowNumber, [File].*, FileType2Lexicon.Label as FileTypeLabel, [People].DefaultPhone, [People].InvertedName as ClientInvertedName, CustomField.Name as FieldLabel, CustomFieldValue.Value as FieldValue
FROM FileType2Lexicon, SelectionCache, [People], [File]
INNER JOIN [CustomRecordSet]
ON [CustomRecordset].RecordId = [File].Id
INNER JOIN CustomFieldValue
ON [CustomRecordset].Id = CustomFieldValue.CustomRecordsetId
INNER JOIN [CustomField2Lexicon]
ON CustomField2Lexicon.CustomFieldId = CustomFieldValue.CustomFieldId
INNER JOIN [CustomField]
ON CustomField.Id = CustomField2Lexicon.CustomFieldId
WHERE [File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
AND [File].FileTypeId = FileType2Lexicon.FileTypeId
AND FileType2Lexicon.LexiconId = @LexiconId
AND [File].ClientIdString = [People].ClientIdString
AND CustomFieldValue.Value <> ''),
SolicitorCTE AS(
SELECT [People].Name AS SolicitorName, [People].InvertedName as InvertedSolicitorName, [File].Id
FROM SelectionCache, [File]
INNER JOIN [People2File]
ON [People2File].FileId = [File].Id
INNER JOIN [Role2Lexicon]
ON [Role2Lexicon].RoleId = [People2File].RoleId
INNER JOIN [People]
ON [People].Id = [People2File].PeopleId
WHERE
[File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
AND [Role2Lexicon].Label = 'Solicitor'),
ArrestingOfficerCTE AS(
SELECT COALESCE(ROW_NUMBER() OVER(PARTITION BY [File].Id ORDER BY [People].InvertedName ASC), NULL) AS RowNumber, COALESCE([People].Name, NULL) AS ArrestingOfficerName, COALESCE([People].CompanyName, NULL) AS ArrestingOfficerCompany, [File].Id
FROM SelectionCache, [File]
INNER JOIN [People2File]
ON [People2File].FileId = [File].Id
INNER JOIN [Role2Lexicon]
ON [Role2Lexicon].RoleId = [People2File].RoleId
INNER JOIN [People]
ON [People].Id = [People2File].PeopleId
WHERE
[File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
AND [Role2Lexicon].Label = 'Arresting Officer'),
BillCTE As(
SELECT [File].Id, SUM(Bill.BilledFee) as BilledFeeTotal, SUM(Bill.BilledExpense) as BilledExpenseTotal, SUM(Bill.BilledTax1) as BilledTax1Total, SUM(Bill.BilledTax2) as BilledTax2Total, SUM(Bill.BilledInterest) as BilledInterestTotal
FROM SelectionCache, [File]
INNER JOIN [Bill]
ON [File].Id = Bill.FileId
WHERE
[File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
GROUP BY [File].Id),
BillPaymentCTE As(
SELECT [File].Id, SUM(BillPayment.FeeAmount) as PaidFeeAmountTotal, SUM(BillPayment.ExpenseAmount) as PaidExpenseAmountTotal, SUM(BillPayment.Tax1) as PaidTax1Total, SUM(BillPayment.Tax2) as PaidTax2Total, SUM(BillPayment.InterestAmount) as PaidInterestAmountTotal
FROM SelectionCache, [File]
INNER JOIN [Bill]
ON [File].Id = Bill.FileId
INNER JOIN [BillPayment]
ON [Bill].Id = BillPayment.BillId
WHERE
[File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
GROUP BY [File].Id),
BillAdjustmentCTE AS(
SELECT [File].Id, COALESCE((SUM(BillAdjustment.FeeAmount)), 0) as AdjustFeeAmountTotal, SUM(COALESCE(BillAdjustment.ExpenseAmount, 0)) as AdjustExpenseAmountTotal
FROM SelectionCache, [File]
INNER JOIN [Bill]
ON [File].Id = Bill.FileId
INNER JOIN [BillAdjustment]
ON [Bill].Id = BillAdjustment.BillId
WHERE
[File].Id = SelectionCache.RecordId
AND SelectionCache.UUID = @UUID
AND SelectionCache.TableCode = @TableCode -- this is the code for File table
AND [File].Id <> 0
GROUP BY [File].Id),
PivotCTE AS(
SELECT *
FROM
(Select Id, FieldLabel, FieldValue FROM DOACTE) AS Source
PIVOT(
MAX(FieldValue) FOR FieldLabel IN ([Date_Arrest], [Graphic_Client], [Ticket_1], [Ticket_2], [Ticket_3], [Ticket_4], [Ticket_5], [Charge_1], [Charge_2], [Charge_3], [Charge_4], [Charge_5])) as Pvt
)
SELECT DOACTE.*,
COALESCE(ArrestingOfficerCTE.ArrestingOfficerCompany, NULL)AS ArrestingOfficerCompany, COALESCE(ArrestingOfficerCTE.ArrestingOfficerName, NULL) AS ArrestingOfficerName,
COALESCE(SolicitorCTE.SolicitorName, NULL) as SolicitorName, COALESCE(SolicitorCTE.InvertedSolicitorName, NULL) as InvertedSolicitorName,
PivotCTE.[Date_Arrest], dbo.GetImagebyId(PivotCTE.[Graphic_Client]) as Photo, PivotCTE.[Ticket_1], PivotCTE.[Ticket_2], PivotCTE.[Ticket_3], PivotCTE.[Ticket_4], PivotCTE.[Ticket_5], PivotCTE.[Charge_1], PivotCTE.[Charge_2], PivotCTE.[Charge_3], PivotCTE.[Charge_4], PivotCTE.[Charge_5],
BillCTE.BilledFeeTotal, BillCTE.BilledExpenseTotal, BillCTE.BilledTax1Total, BillCTE.BilledTax2Total, BillCTE.BilledInterestTotal, (BillCTE.BilledFeeTotal + BillCTE.BilledExpenseTotal + BillCTE.BilledTax1Total + BillCTE.BilledTax2Total + BillCTE.BilledInterestTotal) AS BillTotal,
BillPaymentCTE.PaidFeeAmountTotal, BillPaymentCTE.PaidExpenseAmountTotal, BillPaymentCTE.PaidTax1Total, BillPaymentCTE.PaidTax2Total, BillPaymentCTE.PaidInterestAmountTotal, (BillPaymentCTE.PaidFeeAmountTotal + BillPaymentCTE.PaidExpenseAmountTotal + BillPaymentCTE.PaidTax1Total + BillPaymentCTE.PaidTax2Total + BillPaymentCTE.PaidInterestAmountTotal) AS BillPaymentTotal,
BillAdjustmentCTE.AdjustFeeAmountTotal, BillAdjustmentCTE.AdjustExpenseAmountTotal, (BillAdjustmentCTE.AdjustFeeAmountTotal + BillAdjustmentCTE.AdjustExpenseAmountTotal) AS BillAdjustmentTotal,
((BillCTE.BilledFeeTotal + BillCTE.BilledExpenseTotal + BillCTE.BilledTax1Total + BillCTE.BilledTax2Total + BillCTE.BilledInterestTotal) + (BillAdjustmentCTE.AdjustFeeAmountTotal + BillAdjustmentCTE.AdjustExpenseAmountTotal) - (BillPaymentCTE.PaidFeeAmountTotal + BillPaymentCTE.PaidExpenseAmountTotal + BillPaymentCTE.PaidTax1Total + BillPaymentCTE.PaidTax2Total + BillPaymentCTE.PaidInterestAmountTotal)) AS AccountsReceivable
FROM DOACTE
INNER JOIN
PivotCTE
ON DOACTE.Id = PivotCTE.Id
LEFT JOIN
SolicitorCTE
ON DOACTE.Id = SolicitorCTE.Id
LEFT JOIN
ArrestingOfficerCTE
ON DOACTE.Id = ArrestingOfficerCTE.Id
LEFT JOIN
BillCTE
ON DOACTE.Id = BillCTE.Id
LEFT JOIN
BillAdjustmentCTE
ON DOACTE.Id = BillAdjustmentCTE.Id
LEFT JOIN
BillPaymentCTE
ON DOACTE.Id = BillPaymentCTE.Id
WHERE DOACTE.RowNumber = 1
AND (ArrestingOfficerCTE.RowNumber < 2
OR ArrestingOfficerName IS NULL)
ELSE
DELETE SelectionCache
WHERE UUID = @UUID
AND TableCode = @TableCode
END
RETURN
答案 0 :(得分：1)
它是因为你在CTE级别进行COALESCEing（因此CTE将为NULL值返回0），但是你正在对CTE进行LEFT JOIN。如果没有为CTE返回任何行，则LEFT JOIN将返回NULL。您需要在SELECT语句级别进行COALESCE以补偿这一点。