Navigation:  Data Outputs Tab > Query Creations > Building a single query > Setting Object Aliases

To set alias for an object or derived table in the query, you may right click at the object and select the Properties item from context popup menu or you may double-click at the object header. The Datasource Properties dialog will appear.

The Datasource Properties dialog may contain other server-specific datasource options, but the Alias property is the same for all database servers.