Question

My sql query is as follows

IF @StatusId = 10
    BEGIN
        SELECT 
            *
        FROM 
        Risk AS R
        INNER JOIN Statuses AS St ON R.Status_Id=St.Status_Id
        WHERE
        R.MitigationOwner = COALESCE(@MitigationOwner,R.MitigationOwner)
        AND R.RiskFactor = COALESCE(@RiskFactor,R.RiskFactor)
        AND R.RiskArea = COALESCE(@RiskArea,R.RiskArea)
        AND R.AddedWhen BETWEEN 
        COALESCE(CONVERT(DATETIME, @StartDate+'00:00:00',120),R.AddedWhen) AND 
        COALESCE(CONVERT(DATETIME,@EndDate+'23:59:59',120),R.AddedWhen)
    END 

When I pass only status Id and all other variables are null, then records with NULL MitigationOwner or ModifiedDate are not displayed..
What is wrong in this query?

Answer 1

I believe that by ModifiedDate you meant R.AddedWhen

try this:

SELECT 
            *
        FROM 
        Risk AS R
        INNER JOIN Statuses AS St ON R.Status_Id=St.Status_Id
        WHERE
        (R.MitigationOwner = COALESCE(@MitigationOwner,R.MitigationOwner) OR R.MitigationOwner IS NULL)
        AND R.RiskFactor = COALESCE(@RiskFactor,R.RiskFactor)
        AND R.RiskArea = COALESCE(@RiskArea,R.RiskArea)
        AND (R.AddedWhen BETWEEN 
        COALESCE(CONVERT(DATETIME, @StartDate+'00:00:00',120),R.AddedWhen) AND 
        COALESCE(CONVERT(DATETIME,@EndDate+'23:59:59',120),R.AddedWhen) OR R.AddedWhen IS NULL)