Joomla! 4.x Coding • Re: How to write e.g. left join with nested select stetement?

Code:

$query = " SELECT u.id, u.name AS user_name, t.concatenated_topics as topics  FROM #__users AS u   LEFT JOIN (SELECT id_user, GROUP_CONCAT(t.name) as concatenated_topics                    FROM #__user_topics                   LEFT JOIN #__topics as t on t.id = id_topic                    GROUP BY id_user) AS t on t.id_user = u.id