Reporting Services - How To Create Additional Details Section

Hi All,

I'm using VS 2005 to build a SQL Server reporting Services report. The wizard works great and prompts me to build my results query and then select fields to group the report by.

I'm using the 3 groups as follows:

Page: Product / Model name
Group: Serial No
Details: Orders

Here's the problem. I also want to show my order lines as there is another linked table connected to my order table which holds all order line items. Classic order - line example.

How can I modify the details section to show my line items, as well as not show empty rows when no line items exist?

Thanks!