How to export data of some selected tables?

Sometimes when you want to share data in your tables with others, you export it from Administration -> Periodic -> Data export/import -> Export to. But this exports data in all your tables. What if you want to export data from selected tables only? Here is how you can do that.

First create a definition group from Administration -> Periodic -> Data export/import -> Definitions group

In the definition group form, create a new group. Name it XYZ.
Click on Table setup button.
By default, the table setup form has all the tables listed, select and delete all of them.
Now add only the tables you want data to be exported for.
Now click on Administration -> Periodic -> Data export/import -> Export to
In the definition group, specify the group we created above and click OK

In this way, you can export data for selected tables only.