合併查詢在一個查詢

Question

是否有可能這兩個查詢合併爲一個查詢

SELECT COUNT(IMA.FKRiskID) AS RiskCountWithoutPlan 
FROM Rpt_ImpactAssessment IMA 
WHERE IMA.FKItemID = 38 
    AND IMA.ImpactCurPIDLevel LIKE '%High%' 
    AND NOT EXISTS 
    ( 
     select 1 
     from RM_LinkActionToPlan LAP     
     where IMA.FKPlanID = LAP.PlanID 
    ) 
SELECT COUNT(IMA.FKRiskID) AS RiskCountWithPlan 
FROM Rpt_ImpactAssessment IMA 
WHERE IMA.FKItemID = 38 
    AND IMA.ImpactCurPIDLevel LIKE '%High%' 
    AND EXISTS ( 
        select 1 
        from RM_LinkActionToPlan LAP     
        where IMA.FKPlanID = LAP.PlanID 
      ) 

Answer 1

試試這個。它使用虛擬數據爲我工作（我將發佈查詢作爲評論）。這會給你兩列：第一是RiskCountWithoutPlan二是RiskCountWithPlan

SELECT 
    SUM([rcwop]) [RiskCountWithoutPlan], 
    SUM([rcwp]) [RiskCountWithPlan] 
FROM 
(
    SELECT 
     CASE WHEN LAP.PlanID IS NULL THEN 1 ELSE 0 END [rcwop], 
     CASE WHEN LAP.PlanID IS NOT NULL THEN 1 ELSE 0 END [rcwp] 
    FROM 
     Rpt_ImpactAssessment IMA 
     LEFT JOIN RM_LinkActionToPlan LAP ON IMA.FKPlanID = LAP.PlanID    
    WHERE IMA.FKItemID = 38 
    AND IMA.ImpactCurPIDLevel LIKE '%High%' 
) tbl 

希望這是你所期待的。

斯圖

---

DECLARE @Rpt_ImpactAssessment TABLE (
    FKRiskID INT, 
    FKItemID INT, 
    FKPlanID INT, 
    ImpactCurPIDLevel NVARCHAR(20) 
) 

DECLARE @RM_LinkActionToPlan TABLE (
    FKRiskID INT, 
    FKItemID INT, 
    PlanID INT, 
    ImpactCurPIDLevel NVARCHAR(20) 
) 


INSERT INTO @Rpt_ImpactAssessment VALUES (1, 38, 2, 'High') 
INSERT INTO @RM_LinkActionToPlan VALUES (1, 38, 2, 'High') 

INSERT INTO @Rpt_ImpactAssessment VALUES (1, 38, 3, 'High') 
INSERT INTO @RM_LinkActionToPlan VALUES (1, 38, 3, 'High') 


SELECT 
    SUM([rcwop]) [RiskCountWithoutPlan], 
    SUM([rcwp]) [RiskCountWithPlan] 
FROM 
(
    SELECT 
     CASE WHEN LAP.PlanID IS NULL THEN 1 ELSE 0 END [rcwop], 
     CASE WHEN LAP.PlanID IS NOT NULL THEN 1 ELSE 0 END [rcwp] 
    FROM 
     @Rpt_ImpactAssessment IMA 
     LEFT JOIN @RM_LinkActionToPlan LAP ON IMA.FKPlanID = LAP.PlanID    
    WHERE IMA.FKItemID = 38 
    AND IMA.ImpactCurPIDLevel LIKE '%High%' 
) tbl