SSRS Multiple Value parameter filter based on dataset

Question

Say I have a dataset in SSRS called DataSet1 that looks like this:

CREATE TABLE #data 
(ID int, Value int, UserID varchar(2))
INSERT INTO #data VALUES
(1, 1000,          


        

Answer 1

You will have to have a separate data set for your parameter query and yes you got that part right, for the given data set:

SELECT DISTINCT UserID
FROM TABLE

This query will be used to populate the drop down list of your parameter. (Multiple values allowed or not).

For you Main query:

if you allow Multiple Selection for @UserID parameter you will write you main Data set query with IN operator as below:

SELECT ID, Value, UserID
FROM table
WHERE (UserID IN (@UserID)) 

If you only want users to be able to select only one value at a time the you can write the above query with a where clause something like WHERE UserID = @UserID.

Make sure you map the variables correctly. But you will have to have a separate query for your drop down list.