[英]Correct Usage of IF Exists in SQL
我试图在下面运行以下SQL语句
select FB.FundingSourceID,
FB.FiscalYearID,
(FB.FundingBudget-CA.CurrentAmount-DE.CFOApproved) as Amount from
(select
FundingSourceID,
FiscalYearID,
SUM(COALESCE(Amount,0)) as FundingBudget
from [cap].[FactFundingSourceBudget]
WHERE IsDeleted = 0
group by FundingSourceID, FiscalYearID) AS FB
LEFT JOIN (
select
FundingSourceID,
FiscalYearID,
SUM(COALESCE([Current],0)) as CurrentAmount
from [cap].[FactSampledFunding] F
WHERE F.IsDeleted = 0
group by FundingSourceID, FiscalYearID) AS CA on CA.FundingSourceID = FB.FundingSourceID and CA.FiscalYearID = FB.FiscalYearID
LEFT JOIN (
IF EXISTS (SELECT FundingSourceID, FiscalYearID, SUM(COALESCE(PF.Amount,0))AS CFOApproved FROM [cap].[FactProjectFunding] PF
INNER JOIN [cap].[DimProject] DP ON DP.ProjectID = PF.ProjectID
INNER JOIN [dbo].[WFToken] WT ON DP.MemberGUID = WT.EntityGUID
INNER JOIN [dbo].[WFWorkflowStep] WFT ON WFT.WorkflowStepGUID = WT.WorkflowStepGUID
WHERE PF.IsDeleted = 0 AND WFT.Name IN ('Cancer Center Review', 'Outpatient Center Review', 'Corporate EVP CFO Review', 'Corporate EVP Review', 'Capital Committee Review')
GROUP BY FundingSourceID, FiscalYearID)
SELECT FundingSourceID, FiscalYearID, SUM(COALESCE(PF.Amount,0))AS CFOApproved FROM [cap].[FactProjectFunding] PF
INNER JOIN [cap].[DimProject] DP ON DP.ProjectID = PF.ProjectID
INNER JOIN [dbo].[WFToken] WT ON DP.MemberGUID = WT.EntityGUID
INNER JOIN [dbo].[WFWorkflowStep] WFT ON WFT.WorkflowStepGUID = WT.WorkflowStepGUID
WHERE PF.IsDeleted = 0 AND WFT.Name IN ('Cancer Center Review', 'Outpatient Center Review', 'Corporate EVP CFO Review', 'Corporate EVP Review', 'Capital Committee Review')
GROUP BY FundingSourceID, FiscalYearID
ELSE
SELECT 0 AS [FundingSourceID], 0 as [FiscalYearID], 0 as [CFOApproved]
) AS DE on DE.FundingSourceID = FB.FundingSourceID and DE.FiscalYearID = FB.FiscalYearID
WHERE
FB.FundingSourceID != 1
我得到的错误是:
Msg 156, Level 15, State 1, Line 20
Incorrect syntax near the keyword 'IF'.
Msg 102, Level 15, State 1, Line 34
Incorrect syntax near ')'.
这可能是由于Exists声明的使用不正确,有些人可以帮帮我吗?
如上所述,您无法在查询中使用IF
语句。 当您的子查询产生NULL结果时,您正在寻找的是一种处理AMOUNT
计算的方法。 以下使用ISNULL
表达式来处理此问题:
SELECT
FB.FundingSourceID,
FB.FiscalYearID,
( FB.FundingBudget - ISNULL(CA.CurrentAmount, 0) - ISNULL(DE.CFOApproved, 0) ) AS Amount
FROM
(
SELECT
FundingSourceID,
FiscalYearID,
SUM(COALESCE(Amount, 0)) AS FundingBudget
FROM
[cap].[FactFundingSourceBudget]
WHERE
IsDeleted = 0
GROUP BY
FundingSourceID,
FiscalYearID
) AS FB
LEFT JOIN (
SELECT
FundingSourceID,
FiscalYearID,
SUM(COALESCE([Current], 0)) AS CurrentAmount
FROM
[cap].[FactSampledFunding] F
WHERE
F.IsDeleted = 0
GROUP BY
FundingSourceID,
FiscalYearID
) AS CA
ON CA.FundingSourceID = FB.FundingSourceID
AND CA.FiscalYearID = FB.FiscalYearID
LEFT JOIN (
SELECT
FundingSourceID,
FiscalYearID,
SUM(COALESCE(PF.Amount, 0)) AS CFOApproved
FROM
[cap].[FactProjectFunding] PF
INNER JOIN [cap].[DimProject] DP
ON DP.ProjectID = PF.ProjectID
INNER JOIN [dbo].[WFToken] WT
ON DP.MemberGUID = WT.EntityGUID
INNER JOIN [dbo].[WFWorkflowStep] WFT
ON WFT.WorkflowStepGUID = WT.WorkflowStepGUID
WHERE
PF.IsDeleted = 0
AND WFT.Name IN ( 'Cancer Center Review',
'Outpatient Center Review',
'Corporate EVP CFO Review',
'Corporate EVP Review',
'Capital Committee Review' )
GROUP BY
FundingSourceID,
FiscalYearID
) AS DE
ON DE.FundingSourceID = FB.FundingSourceID
AND DE.FiscalYearID = FB.FiscalYearID
WHERE
FB.FundingSourceID != 1
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