Use Query Results To Feed Data Flow

Greetings,

I need some help determining the best way to accomplish my task. The workflow starts by generating a list of unique ID's from a local table. Then take that list of unique ID's and query an Oracle table for all matching records.

My thought was to first use an Execute SQL task with the following SQL:

select projectid from projectlist group by projectid

with Result Set configured as follows:

Result Name = projectid
Variable Name = varProjectIDList

Then in the Data Flow Task add a DataReader Source to pull the matching data. Here's where I'm getting hung up. I'd like to pass the result set from the Execute SQL task. I tried the following SQL but it doesn't work.

select * from masterlist where projectid = @[User::varProjectIDList]

I'm open to any suggestion on the best way to take my unique list and use it as input for a query against my Oracle DB.

Thank you for your ideas.

Rob