rand() is erg duur. Dit zal helpen:http://www.titov.net/2005/09/21/do-not-use-order-by-rand-or-how-to-get-random- rijen-van-tafel/
rand() is erg duur. Dit zal helpen:http://www.titov.net/2005/09/21/do-not-use-order-by-rand-or-how-to-get-random- rijen-van-tafel/