SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 2)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier users (alias u1)
           TablesInSelectQueryElement (children 2)
            TableExpression (children 1)
             TableIdentifier users (alias u2)
            TableJoin
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier age
     Identifier u2.age
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier ALL
