Doctrine: calculating datetime difference

How can i calculate the difference between datetime column and now (for example 'created_at' and NOW()) in Doctrine?

I Googled it alot and couldn't find an answer..

Th开发者_如何学Goanks in advance!

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Have you tried this?

$query->select('DATEDIFF(NOW(), datetime column)')

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try $query -> select(DATE_DIFF(CURRENT_DATE(), datetime column))

DQL dont use now() sql function, they use CURRENT_DATE() instead