SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 3)
    Identifier parent_key
    Identifier child_key
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier data_02233
   ExpressionList (children 2)
    Identifier parent_key
    Identifier child_key
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier parent_key
    OrderByElement (children 1)
     Identifier child_key
   Set
