SQL - User Macros Page
The User Macros tab on the SQL dialog lets you create variables for representing values within the query. These variables are called macros.
Click on the button to create a new user macro. The Macro dialog is displayed. Enter a name in the Title box and a Value, then click on OK.
To change the macro's value or name, either double-click on an existing user macro or click on the macro and then on the button. Click on OK to confirm the changes.
Click on an existing user macro and then on the button to delete the user macro.
For information on the dialog buttons, see SQL Dialog.