How to filter a dataset using a parameter?

Question

I have two reports which share one stored procedure as a dataset source and are almost identical except of filter clausule. I've created an inner report parameter and what to set a filter according to this param.

I've tried:

...data
    WHERE 
        CASE WHEN @ReportFilter = 1 THEN apd.[Date] BETWEEN @DateFrom AND @DateTo
             WHEN @ReportFilter = 2 THEN pd.[Date] BETWEEN @DateFrom AND @DateTo
        END

Answer 1

Just use your case expression to return a single date value and then check if that value is between @DateFrom and @DateTo. I also simplified the case expression a bit.

WHERE 
    CASE @ReportFilter 
        WHEN 1 THEN apd.[Date]
        WHEN 2 THEN pd.[Date] 
    END
    BETWEEN @DateFrom AND @DateTo

But be careful with BETWEEN, it can cause some challenges:

• What do BETWEEN and the devil have in common?

Answer 2

Try

(1 = CASE WHEN @ReportFilter = 1 and apd.[Date] BETWEEN @DateFrom AND @DateTo then 1
          WHEN @ReportFilter = 2 and pd.[Date] BETWEEN @DateFrom AND @DateTo then 1
        END)