Where子句返回Count（）的所有行和非特定行（）

Question

我有一個select語句，它根據已經爲「程序」，「觀察」或者「包含在存儲過程中的'條件'。我正在使用'程序'，'觀察'和'條件'作爲可選參數。 '程序'，'條件'和'觀察'都存儲在不同的表格中。目標是計算一段時間內具有「程序」，「觀察」或「條件」的患者數量的「分子」值。

看起來如果同一個患者有多個'程序'，多個'觀察'或多個'條件'，'計數'是派生所有這些，而不是針對特定的「分子」值存儲過程。

Parameter declarations: 
@CareSite VARCHAR(1000),  /* where visit occurs */ 
@AgeStart VARCHAR(10),   /* starting age patient's age falls in */ 
@AgeEnd VARCHAR(10),   /* ending age patient's age falls in */ 
@Gender VARCHAR(10),   /* 'men' or 'women' 
@Procedure_Numerator VARCHAR(1000)=null, /* procedure the visit is for */ 
@Condition_Numerator VARCHAR(1000)=null, /* condition the visit is for */ 
@Observation_Numerator VARCHAR(1000)=null /* observation the visit is for */ 

SELECT statement: 

DECLARE @D1NumVal INT 
    SET @D1NumVal = (SELECT COUNT(*) AS Numerator 
         FROM SAS2SQL_DenominatorPersonTest DPT 
         JOIN SAS2SQL_DenominatorProcedureTest DPRT 
         ON DPRT.PersonID = DPT.PersonID 
         JOIN SAS2SQL_DenominatorConditionTest DCT 
         ON DCT.Person_ID = DPT.PersonID 
         JOIN SAS2SQL_DenominatorObservationsTest DOT 
         ON DOT.PersonID = DPT.PersonID 
         WHERE DPT.D1 = 1 
         AND DPT.Age >= @AgeStart AND DPT.Age <= @AgeEnd 
         AND (@Procedure_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave = 
          @Wave 
          AND DPT.Gender = @Gender AND 
          DPRT.ProcudureSourceValue = 
          @Procedure_Numerator) 
         OR (@Condition_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave =  
          @Wave 
         AND DPT.Gender = @Gender AND 
          DCT.X_Condition_Source_Desc = 
          @Condition_Numerator) 
          OR (@Observation_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave = 
          @Wave 
          AND DPT.Gender = @Gender AND 
          DOT.ObservationSourceValue = 
          @Observation_Numerator)) 

我使用「CASE何時」的做法，但試了一下我上面已經返回的結果更接近我試圖生成。

Answer 1

您可能需要添加括號，因爲AND在OR之前被評估，在第二個AND之後被評估並且是最後一個。

這似乎符合您的描述：

DECLARE @D1NumVal INT 
    SET @D1NumVal = (SELECT COUNT(*) AS Numerator 
         FROM SAS2SQL_DenominatorPersonTest DPT 
         JOIN SAS2SQL_DenominatorProcedureTest DPRT 
         ON DPRT.PersonID = DPT.PersonID 
         JOIN SAS2SQL_DenominatorConditionTest DCT 
         ON DCT.Person_ID = DPT.PersonID 
         JOIN SAS2SQL_DenominatorObservationsTest DOT 
         ON DOT.PersonID = DPT.PersonID 
         WHERE DPT.D1 = 1 
         AND DPT.Age >= @AgeStart AND DPT.Age <= @AgeEnd 
         AND((@Procedure_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave = 
          @Wave 
          AND DPT.Gender = @Gender AND 
          DPRT.ProcudureSourceValue = 
          @Procedure_Numerator) 
         OR (@Condition_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave =  
          @Wave 
         AND DPT.Gender = @Gender AND 
          DCT.X_Condition_Source_Desc = 
          @Condition_Numerator) 
          OR (@Observation_Numerator IS NOT NULL AND 
          DPT.CareSiteName = @CareSite AND DPT.Wave = 
          @Wave 
          AND DPT.Gender = @Gender AND 
          DOT.ObservationSourceValue = 
          @Observation_Numerator)))