php - How to resolve "ORDER BY clause is not in SELECT list" caused MySQL 5.7 with SELECT DISTINCT and ORDER BY

Question

I installed the new Ubuntu and my code has got a problem with MySQL.

( ! ) Warning: PDOStatement::execute(): SQLSTATE[HY000]: General error: 3065 
Expression #2 of ORDER BY clause is not in SELECT list, references column 'clicshopping_test_ui.p.products_date_added' which is not in SELECT list; this is incompatible with DISTINCT 
in /home/www//boutique/includes/OM/DbStatement.php on line 97s

It seems MySQL 5.7 does'nt allow a request like:

select .... distinct with  order by rand(), p.products_date_added DESC

If I use this it works:

select distinct .... with  order by rand(), 

How to resolve this situation ?

My SQL request in PHP

 $Qproduct = $OSCOM_PDO->prepare('select distinct p.products_id,
            p.products_price
            from :table_products p left join :table_specials s on p.products_id = s.products_id
            where products_status = :products_status
            and products_view = :products_view
            and p.products_archive = :products_archive
            order by rand(),
            p.products_date_added DESC
            limit :products_limit');
                  $Qproduct->bindInt(':products_status', 1);
                  $Qproduct->bindInt(':products_view', 1);
                  $Qproduct->bindInt(':products_archive', 0);
                  $Qproduct->bindInt(':products_limit', 
                  (int)MODULE_FRONT_PAGE_NEW_PRODUCTS_MAX_DISPLAY);

Answer 1

If you have control of the server and you are running legacy code you can't easily change, you can adjust the SQL mode of the server and remove "only_full_group_by" either for the duration of boot, by running the query

SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

or by adding sql_mode='' to your my.cnf file.

Obviously its better to change your code if you have the possibility, but if not, this will disable that warning.