War es wirklich?

www.scribd.com/doc/3574793/Joinfu-The-Art-of-SQL-Part-I

Jeff Atwood on performance:
http://www.codinghorror.com/blog/2011/06/performance-is-a-feature.html

http://www.mysqlperformanceblog.com/2011/04/07/optimizing-slow-web-pages...

Alle Drupal-Nachrichten-IDs ohne Übersetzung löschen:

delete locales_source from locales_source left join locales_target using (lid) where locales_target.lid is null;