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I'm trying to clean up a database in order to move a website from a server to another. Database is more than 1gb, mostly posts revisions and spam comments.

Is it safe for instance to do something like this?

DELETE FROM wp_2_posts WHERE post_name LIKE '%revision%'

Thanks.

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    On a side-note, you can limit the number of revisions WordPress stores by adding this to the wp-config.php file: define( 'WP_POST_REVISIONS', 3 ); - Read More in The Codex
    – Howdy_McGee
    Apr 28, 2015 at 17:01

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Yes, it is safe but always prefer a database backup before. You can also try the Minimise WordPress DB queries to clean more.

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