The Merge Table Options section is used to
        configure MERGE tables in MyISAM. To create a MERGE table,
        select MERGE as your storage engine in the
        Table Options
        Tab and then specify the tables you wish to MERGE in the
        Union Tables dialog.
      
        You can also specify the action the server should take when
        users attempt to perform INSERT statements on the merge table.
        See The MERGE Storage Engine, for more information
        on MERGE tables.
      

