Display 2 tablix in SSRS 1 for paramter and the other for previous value of parameter

Question

Im working on report for a periodic form.. Its form that be collected every Quarter of year Q1 2021 Q2 2021 Q3 2021

I want to make a report for multiple indicators that is displayed on tablix based on Quarter user choose using single choice parameter

Quarter: Q2 2021

Q2 2021 Tablix 1 data

But the challenge for me is to display automatically a previous Quarter to compare When I choose a specific parameter value

Quarter: Q2 2021

Q2 2021 Tablix 1 data

Q1 2021 Tablix 2 data

Any ideas How to do it Thank you

Answer 1

Whether you do it in the SQL or in an SSRS filter, the Quarter parameter year and quarter would need to be parsed out, the quarter subtracted, and then converted back to the correct format. I am assuming that you already have a field to use the parameter.

WHERE Q IN (@QUARTER, 
            'Q' + 
            CAST(CAST(ISNULL(NULLIF(SUBSTRING(@QUARTER, 2, 1), '1'), '5') AS INT) - 1 AS CHAR(1)) + ' ' + 
            CAST(CAST(RIGHT(@QUARTER, 4) AS INT) - IIF(SUBSTRING(@QUARTER, 2, 1) = '1', 1, 0) AS CHAR(4))
            )

This will create the previous Q by taking the quarter of the parameter, converting to NULL if it's one, then if null, convert the q to a 5 and subtract 1 to get the correct quarter. It adds a space and then the year, subtracting a year if the q was 1.