问题
I have two datasets in a SQL Server 2008 reporting services report. I need to attach a WHERE clause to the second one that will contain a value from the first one. How should I write that second query?
回答1:
If I understand what you are asking, you should run a SUB query within the where clause.
SELECT title FROM books WHERE author_id IN (SELECT id FROM authors);
来源：https://stackoverflow.com/questions/5099870/sql-server-reporting-service-reference-another-dataset