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Databases SQL Reporting by Example Day 1: Joining Tables 7th Grade Science

Posted by Rushabha Jain
.a{fill-rule:evenodd;}techdegree
Rushabha Jain
Front End Web Development Techdegree Student 9,859 Points

cte vs join performance

Which method we should prefer while writing SQL queries, CTE or JOIN?

Jassim Alhatem
Jassim Alhatem
20,883 Points

Can you elaborate a little?

1 Answer

Randy Laird
Randy Laird
11,297 Points
Randy Laird
Randy Laird
11,297 Points

It depends on what you're wanting to do. In my day to day work I setup CTE's if I want to have a specific set of data that I can query from, otherwise I do a join.

I read somewhere that CTEs are loaded into RAM and can be faster than a join, but I've also read conflicting information in some forums.