SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier n
    Identifier __unused_group_by_column
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
   ExpressionList (children 1)
    Identifier __unused_group_by_column
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier __unused_group_by_column
