As data volumes continue to increase, SQL performance and tuning remain as critical as ever. But it is not all about Explain Plans, using hints and adding indexes.
How you structure your data and how you cluster your information together is vital to getting the best performance from your database - and it is often overlooked. It is an urban myth that you no longer need to consider where your data actually is, if you care about performance that is.
By using Index Organised Tables, Cluster, Partitioning, normal indexes and other tricks, you can not only access your data quicker, you can greatly increase the use of your database's memory. This in turn can make your whole database perform better,