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THE BETTER WAY TO ORDER BY RAND in scope

by xdite —

ORDER by RAND() in MySQL is super slow. Jan Kneschke had wrote a article ORDER BY RAND() 3 years ago.This article explains a lot about his alternative ORDER BY RAND solution

But it’s find_by_sql version, I just refactor it to scope version THE BETTER WAY TO ORDER BY RAND in scope. And discuss more scenarios.

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