Question

我使用以下查询获取信用点，如果ID_Points = 2然后0.5和ID_points = 3然后0.25

，我将如何添加另外两个条件

SELECT     
    Attend_ID, 
    Attend_Date, 
    ID_Points, 
    Employee_ID, 
    First_Name, 
    Last_Name, 
    NextDate, 
    NEXT123, 
    Difference, 
    DAY90CREDIT, 
    CREDITDATE, 
    CASE 
        WHEN (day90Credit = 0 AND CreditDate < Getdate()) 
          OR DateAdd(DAY, 90, attend_date) < COALESCE (NextDate, GETDATE()) 
         AND ID_Points = 1 THEN 1 
        ELSE 0 END AS TOTALCREDIT                  
FROM
     dbo.Test_DiffNintyDays

Answer 1

良好的格式化使这更容易，更明显：

假设您的描述是文字：

 SELECT     Attend_ID, 
            Attend_Date, 
            ID_Points, 
            Employee_ID, 
            First_Name, 
            Last_Name, 
            NextDate, 
            NEXT123, 
            Difference, 
            DAY90CREDIT, 
            CREDITDATE, 
            CASE 
                WHEN (day90Credit = 0 AND CreditDate < Getdate()) 
                  OR DateAdd(DAY, 90, attend_date) < COALESCE (NextDate, GETDATE()) 
                 AND ID_Points = 1 THEN 1
                WHEN ID_Points = 2 THEN 0.5 
                WHEN ID_Points = 3 THEN 0.25
                ELSE 0 END AS TOTALCREDIT                  
  FROM     dbo.Test_DiffNintyDays

然而，我怀疑你真的是这个意思：

 SELECT     Attend_ID, 
            Attend_Date, 
            ID_Points, 
            Employee_ID, 
            First_Name, 
            Last_Name, 
            NextDate, 
            NEXT123, 
            Difference, 
            DAY90CREDIT, 
            CREDITDATE, 
            CASE 
                WHEN (day90Credit = 0 AND CreditDate < Getdate()) 
                  OR DateAdd(DAY, 90, attend_date) < COALESCE (NextDate, GETDATE()) 
                 AND ID_Points = 1 THEN 1
                WHEN (day90Credit = 0 AND CreditDate < Getdate()) 
                  OR DateAdd(DAY, 90, attend_date) < COALESCE (NextDate, GETDATE()) 
                 AND ID_Points = 2 THEN 0.5 
                WHEN (day90Credit = 0 AND CreditDate < Getdate()) 
                  OR DateAdd(DAY, 90, attend_date) < COALESCE (NextDate, GETDATE()) 
                 AND ID_Points = 3 THEN 0.25
                ELSE 0 END AS TOTALCREDIT                  
  FROM     dbo.Test_DiffNintyDays

多案例条件

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