how to update all rows of an table with $wpdb? I tried this, but won't work:

$wpdb->update( 'wp_comments, array( 'comment_karma'  => '123' ), null );

and this

$wpdb->update( 'wp_comments, array( 'comment_karma'  => '123' ), array() );

So how to do this? Thanks in advance!

1 Answer 1


It will not work as the update statement requires a selector to narrow down what to update. You should use a general query. For your needs use this:

        "UPDATE $wpdb->comments
         SET `comment_karma` = %s",

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