Any way to pass Multiple Values for a single Label in the Parameter?

Question

I have a Report that Contains 2 Parameters, @Customer & @Area. When trying to set up the Available Values for @Area, I'm having issues using multiple values for one Label, i.e. = "4006" Or "4610"
One of the Filters in the Report is an Operation number, which is the [OPERATION] field, which is setup as a filter on the Tablix referencing the @Area parameter. 
PROBLEM: I cannot retrieve any data when trying to use the ‘Or’ Operator here. If I simply put “4006” or “4610” I retrieve data, but when trying to combine it returns no data.
Example, I need to allow a user to select ‘Chassis Incoming’, which would include data from Operations 4006 & 4610.
QUESTION:
Any way to pass Multiple Values for a single Label in the Parameter?
I realize the typical solution may be to use ‘Multi-Value’ selection, but in this case we want the User to select the Area and the multiple values for Filtering will be automatically determined for them. Otherwise, they are subject to not getting
it correct.
I have tried several different ways, such as =”4006” Or “4610”, =(“4006”, “4610”), = In(“4006”, “4610”), etc….
Note: We are using Report Builder 3.0

Answer 1

Based on my experience, there's no way to 'intercept' the query that gets passed back to SQL Server, so a Split wouldn't work.
Try creating either a function or stored procedure using the code below (compliments to
http://www.dotnetspider.com/resources/4680-Parse-comma-separated-string-SQL.aspx) to parse the string: 
CREATE FUNCTION dbo.Parse(@Array VARCHAR(1000), @Separator VARCHAR(10))
RETURNS @ResultTable TABLE (ParseValue VARCHAR(100))AS
BEGIN
DECLARE @SeparatorPosition INT
DECLARE @ArrayValue VARCHAR(1000)
SET @Array = @Array + @Separator
WHILE PATINDEX('%' + @Separator + '%' , @Array) <> 0
BEGIN
SELECT @SeparatorPosition = PATINDEX('%' + @Separator + '%', @Array)
SELECT @ArrayValue = LEFT(@Array, @SeparatorPosition - 1)
INSERT @ResultTable VALUES (CAST(@ArrayValue AS VARCHAR))
SELECT @Array = STUFF(@Array, 1, @SeparatorPosition, '')
END
RETURN
END
Once created you can do things like this:
SELECT * FROM Parse('John,Bill,David,Thomas', ',')
SELECT * FROM (SELECT 'John' AS TestName union select 'David' AS TestName) AS Main
WHERE TestName IN (SELECT ParseValue FROM dbo.Parse('John,Bill,David,Thomas', ','))
This is what your SQL query would probably look like:
SELECT OperationID, OperationName FROM dbo.Operations
WHERE AreaID IN (SELECT ParseValue FROM dbo.Parse(@Area, ','))
You may need to fiddle around with the Separator depending on whether SQL Server inserts a space between the comma and next value.