SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier Alpha
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier Beta
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier foo
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier foo
