Re: [GENERAL] continuous copy/update one table to another

[Szymon Guz]

W dniu 1 marca 2010 09:40 użytkownik Grzegorz Jaśkiewicz
<gryz...@gmail.com>napisał:

> don't use 'NOT EXISTS', as this will be damn slow. Use LEFT JOIN.
>
>
Right, LEFT JOIN should be faster (with proper indices even much faster).