Category Archives: Beginners

How to determine which view to use

Often times DBAs or application architects create views to conceal complex joins or aggregations in order to help simplify the SQL queries developers need to write.  However, as an application evolves, and the number of views grow, it can often … Continue reading

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Does the Explain Plan command really show the execution plan that will be used?

When it comes to SQL tuning we often need to look at the execution plan for a SQL statement to determine where the majority of the time is spent. But how we generate that execution plan can have a big … Continue reading

Posted in Beginners, Optimizer | Tagged , , , | 1 Comment