IN Operator Parameter using stored procedure

Question

Hi Guys,
I'm running a reporting services report using stored procedure and I'm facing a dilemma with the IN Operator in the stored procedure.
Can someone please help me out debugging the statement below? (run it on AdventureWorks Database)
Can I have the @Title Parameter based on another select statement something like this 
Set @Title = SELECT Title FROM TableTitle
DECLARE @Title varchar(1000)
set @Title = 'Design Engineer', 'Tool Designer', 'Marketing Assistant'
SELECT FirstName, LastName, e.Title
FROM HumanResources.Employee AS e
JOIN Person.Contact AS c
ON e.ContactID = c.ContactID
WHERE e.Title IN (@Title)
Appreciate all the help on this.
Thank you
John

Answer 1

Hi John,
For your problem, we can use dynamical statement to solve the issue.
Here are 2 options to be clarified:
         1. A multi-value parameter will return an array value.
         2. It is not able to pass an array in a stored procedure.
To solve the issue, we can use the following steps:
1.              Cconvert the array into string that delimited by “,” using the function “Join” in SQL Server Reporting Services.
2.              Pass the string in the stored procedure.
3.              Combine the parameter and the statement into one simply string.
4.              Execute the simply string.
Here are the detailed steps for your reference:
1.       In Report Designer, create a new dataset as “SELECT Title FROM TableTitle”.
2.       Create a new multi-value parameter, set the available value from the dataset above.
3.       Set the query of the main dataset as :
="spSelect_Title "&Join(Parameters!para.Value, ",")
4.       Change the stored procedure as:
ALTER PROCEDURE [dbo].[spSelect_Title]
         -- Add the parameters for the stored procedure here
         --@Query NVarchar(Max),
         @Title NVarchar(MAX)
AS
BEGIN
         -- SET NOCOUNT ON added to prevent extra result sets from
         -- interfering with SELECT statements.
         SET NOCOUNT ON;
         DECLARE @Query Varchar(Max)
         SET @Query = 'SELECT FirstName, LastName, e.Title
         FROM HumanResources.Employee AS e
         JOIN Person.Contact AS c
         ON e.ContactID = c.ContactID
         WHERE e.Title IN (' + @Title+ ')'
--       PRINT ' QUERY = '+ ISNULL(@Query,'NULL')
         Execute sp_executesql @Query
END
If you have any more questions, please feel free to ask.
Thanks,
Jin
Jin Chen - MSFT