\documentclass{article}

\usepackage[a4paper]{geometry}

\title{ P18 }

\author{ Sam Wilson }

\date{ 2020 November 4 (Wednesday), 1:57AM }

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Oh, maybe it's not possible!

\url{https://www.doctrine-project.org/projects/doctrine-orm/en/2.7/reference/faq.html#can-i-sort-by-a-function-for-example-order-by-rand-in-dql}

\begin{quote}
Can I sort by a function (for example ORDER BY RAND()) in DQL?

No, it is not supported to sort by function in DQL. If you need this functionality you should either use a native-query or come up with another solution. As a side note: Sorting with ORDER BY RAND() is painfully slow starting with 1000 rows.
\end{quote}

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