ALL parameter for SSRS Report

Question

I want to be able to let the business manually enter a USERID into a parameter box or leave it blank for it to bring back all USERID's.

I have setup another parameter for CUSTOMERID which uses a dataset to bring back a list of customer ID's. Due to the amount of USERID's I don't want to use the same solution but instead have them manually enter the USERID or leave it blank and bring back ALL.

SELECT 
    CUSTOMERID,
    CASE 
    WHEN STATUSCODE = 200 THEN 'Successful Logon' 
    ELSE 'Unsuccessful Logon' 
    END as LogonStatus,
    COUNT( * ) COUNTOFACCOUNTS

FROM 
    MA4EQNG.APPLICATIONLOG
WHERE 
    CUSTOMERID in ('"+join(Parameters!CustomerID.Value, "','")+"')
    AND (Cast(DATETIME as Date) >= '"& Format(Parameters!FromDate.Value, "yyyy-MM-dd") & "' 
    AND Cast(DATETIME as Date) <= '" & Format(Parameters!ToDate.Value, "yyyy-MM-dd") & "') 
    AND COMPONENTDESCRIPTION = '/eq/auth/v1/logon'
    AND METHOD = 'POST' 

GROUP BY 
    CUSTOMERID,
    CASE 
        WHEN STATUSCODE = 200 THEN 'Successful Logon' 
        ELSE 'Unsuccessful Logon' 
    END

ORDER BY
CUSTOMERID ASC

Please let me know if you need anything else.

Answer 1

You can set the USERID parameter to allow blank value then use IF condition on your main dataset sql script.

Try

IF LEN(@USERID)>0
*put the sql script with UserId filter in where clause*
ELSE
*put the sql script WITHOUT UserId filter in where clause*

Answer 2

Normally you would just script something like this in the WHERE clause.

WHERE isnull(@CustomerID,'') = '' OR (CUSTOMERID in('"+join(Parameters!CustomerID.Value, "','")+"'))

And long term, I would create a function that takes in a delimited string, and converts them to rows, then you can just join on the results from the table valued function.

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