Norwinter Studios

This video tutorial does a pretty good job of explaining it:

Tutorial about Subreports.

Here’s the basic idea:

• In the main report right click the subreport and view its properties.
• Go to the Subreport (Other) tab and click the Add… button under the parameters list.
• Give your parameter a name and an expression. For example MASTER_ID and $F{id}.
• Ok the dialog and open the subreport.
• Go to View/Parameters in the menu.
• Add a new parameter with the name you specified in the master report, e.g MASTER_ID.

Now you can use $P{MASTER_ID} to refer to the id of the master report or whatever. I used it to make my SQL statement for the subreport.

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