SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier id
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier a1 (alias a1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier b1 (alias b1)
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier a1.id
        Identifier b1.id
   ExpressionList (children 1)
    Identifier id
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
