8 Comments
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Ivan H's avatar

Could you also write about NoSQL specifically MongoDB?

Andy Miles's avatar

Thanks for writing such a clear article. I shared it with all my clients.

Mihailo Joksimovic's avatar

This is really great article

Loïc's avatar

You also have tons of tutorials on https://livesql.oracle.com/

GAURAV KUMAR's avatar

is it possible for query optimizer to chose sub optimal plan which can cause performance degradation. This happened in one of the environment and still i couldn't get the idea behind it

Anonymouseee's avatar

Thank you for this good sir!

Esraa's avatar

what is the idea behind avoiding SELECT DISTINCT where possible?