If no tables are present, you can click Populate with a Join Model to select from the available join models. On the Select a Join Model window, all available join models are displayed, along with their descriptions. Select the desired join model and click OK.

The advantage to using the Populate with a Join Model action is that the table and join relationships have already been defined. You do not need to individually add each table and join yourself when defining a new query. When using a join model, you can add the desired report items for your query from the Select or Constrain tab. When your query has been completely defined, you can have the Query Builderautomatically remove any tables and joins that are not used.

For more information, see Join Models.