SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 3)
    Identifier k
    Function sumMerge (children 1)
     ExpressionList (children 1)
      Identifier d
    Function avgMerge (children 1)
     ExpressionList (children 1)
      Identifier af_avg1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier agg_func_col
   ExpressionList (children 1)
    Identifier k
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k
