What good assets exists for understanding database tuning around the major engines and evolving your understanding for the reason that area?

The thought of this would be to collect your shed load of assets that almost always exist, to ensure that people may have a "one-stopInch understanding shop from the good, peer approved assets.


General SQL

PostgreSQL (wiki) (PGsearch)

MySQL

Oracle

MS SQL Server

Sybase SQL Anywhere

JDBC