Query tuning in oracle with example
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Oracle sql performance tuning interview questions...
How do I learn to tune SQL?
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I'm regularly asked, "How do I tune a database?", to which I usually suggest, "How do I tune SQL?", is a better question, since the vast majority of problems with database performance are down to poorly written SQL, or good SQL written against badly designed data models.
There are whole books written about SQL tuning, so a brief article is going to be flawed, but I wanted to put down some ideas and thought processes that might help anyone new to this subject.
This article will no doubt evolve over time, but I will try to keep it really light.
If you are experienced in SQL tuning, you may find some of the topics covered here an extreme over-simplification.
Oracle query optimization tool
That is intentional. Remember, it's for beginners.
Identify Resource Intensive SQL
You often know exactly which SQL statement to tune, since you are working on it already, or a user has reported performance problems with a specific report or piece of application functionality.
If that's the case, no problem.
In some situations you are presented w
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