SSRS monthly/daily report - sql-server

Question

I have a variable in my report which holds 2 possible values: 'monthly' and 'daily'. How can I put this variable (lets call it #reportModel). I think it should be somewhere in GROUP BY clause, but don't know how should it look like.
DECLARE #reportModel VARCHAR(10)
SET #reportModel = 'monthly'
SELECT P.product, SUM(O.price * O.quantity), O.orderDate
FROM Products AS P
INNER JOIN Orders AS O ON P.ID = O.ID
And what now?

Answer 1

How about a stored procedure to handle this, something like.....
CREATE PROCEDURE rpt_GetData
#reportModel VARCHAR(10)
AS
BEGIN
SET NOCOUNT ON;
DECLARE #Sql NVARCHAR(MAX);
IF (#reportModel = 'daily')
BEGIN
SET #Sql = N' SELECT P.product
, SUM(O.price * O.quantity) AS Total
, O.orderDate
FROM Products AS P
INNER JOIN Orders AS O ON P.ID = O.ID
GROUP BY P.product , O.orderDate'
Exec sp_executesql #Sql
END
ELSE IF (#reportModel = 'monthly')
BEGIN
SET #Sql = N' SELECT P.product
, SUM(O.price * O.quantity) AS Total
, MONTH(O.orderDate) AS [Month]
FROM Products AS P
INNER JOIN Orders AS O ON P.ID = O.ID
GROUP BY P.product, MONTH(O.orderDate)'
Exec sp_executesql #Sql
END
END

Answer 2

Adding this as an answer because I mentioned it in the comments in #M.Ali's answer.
So I would suggest you change thinking slightly with one of these options.
Two reports - Simply make a report for daily and another for monthly. Now you have no worries with complex SQL etc.
Make 2 stored procedures, one with the GROUP BY daily and one monthly. Then in your SSRS dataset, create an expression for you SQL that chooses the procedure based on parameter:
=IIf(Parameters!reportModel.Value = "monthly", "GetMonthlyData", "GetDailyData")

Answer 3

I would put it in the Group On Expression of the table or chart rather than doing it in the query.
=IIF(Parameters!reportModel.Value = "monthly", Month(Fields!orderDate.Value), Fields!orderDate.Value)
If you'd rather do it in the query and don't want to wait for DBAs to get around to deploying a Stored Procedure (not to mention maintaining it whenever there's a change), you could use your parameter in a CASE like:
SELECT P.product, SUM(O.price * O.quantity),
CASE WHEN #reportModel = 'monthly' THEN CAST(MONTH(O.orderDate) AS VARCHAR(12))
ELSE CAST(O.orderDateAS VARCHAR(12)) END AS DT
FROM WORKFLOW_SHARED.MAIN.VW_CLAIMSOVERPAYMENT
WHERE DATECOMPLETED > '7/1/2015'
GROUP BY P.product,
CASE WHEN #reportModel = 'monthly' THEN CAST(MONTH(O.orderDate) AS VARCHAR(12))
ELSE CAST(O.orderDateAS VARCHAR(12)) END
This way you don't have to maintain two separate reports.

Answer 4

How about something simple like this
select
P.product
,Total = sum(O.price * O.quantity)
, O.orderDate
from
Products as P
inner join Orders as O on P.ID = O.ID
where
#reportModel = 'daily'
union all
select
P.product
,Total = sum(O.price * O.quantity)
,[Month] = MONTH(O.orderDate)
from
Products as P
inner JOIN Orders as O on P.ID = O.ID
group by
P.product
,[Month] = MONTH(O.orderDate)
where
#reportModel = 'monthly'