You do not have to select a node to edit database queries using this dialog. You can create new expressions or delete and edit existing expressions.
To select a database query
- In the Edit menu, select the Edit database query item.
 - On the left-hand side of the Edit database queries dialog, mark a database query list.
 - Perform one of the following tasks:
- Overwrite the database expression name in the Identifier.
 - Enter explanatory text in Description.
 - Edit the SQL expression.
 - Select or de-select other dialog groups.
 - Select or de-select all dialog groups.
 - Test the expression by clicking on Test statement... and enter a parameter value in the next dialog.
 
 - Save the changes.