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The *LOWEST* Possible Cost For a Query

May 24, 2020August 13, 2020 Kaley Crum

Quick: If you had to pick the least-expensive-cost query you could think of, what would that query look like? …(hums Jeopardy theme)…. Ding! Time’s up!! Most people respond with something “select from a one-block table.” Let’s give it a shot:… Read More

Database Objects, Explain Plans, Hash Clusters, Oracle, Tuning/EfficiencyLeave a comment

What is Cost? How Can I Use It to Tune SQL?

September 3, 2019August 13, 2020 Kaley Crum

When most people first start learning to tune SQL, they develop a fascination with this mysterious column on the execution plan called “cost.” What is cost? And how can you use it to tune SQL? So here’s, high level, what… Read More

Execution Plans, Explain Plans, Oracle, Tuning/EfficiencyLeave a comment

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