* Change SQL update query for MariaDB / MySQL
fix https://github.com/FreshRSS/FreshRSS/issues/5707
* No change for SQLite
* Fix merge error
* Update MySQL version on the model of PostgreSQL
Performance to be tested
* Fix LEFT JOIN, also for PostgreSQL / SQLite
* Fix alias
* Reduce MySQL deadlock
* Fix compatibility with SQLite
* Back to identical SQL for all databases