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    <p>If I have understood your question correctly, this should do the trick:</p> <pre><code>SELECT * FROM table1 ORDER BY DATE(md) DESC, RAND(); </code></pre> <p>Example:</p> <pre><code>DROP TABLE IF EXISTS `table1`; CREATE TABLE `table1` ( `id` int(11) NOT NULL auto_increment, `md` DATETIME, PRIMARY KEY (`id`) ) ENGINE=InnoDB; DELIMITER // DROP PROCEDURE IF EXISTS autofill// CREATE PROCEDURE autofill() BEGIN DECLARE i INT DEFAULT 0; WHILE i &lt; 50 DO INSERT INTO table1 (md) VALUES (DATE_ADD(NOW(), INTERVAL FLOOR(RAND() * 1000) HOUR)); SET i = i + 1; END WHILE; END; // DELIMITER ; CALL autofill(); SELECT * FROM table1 ORDER BY DATE(md) DESC, RAND(); +----+---------------------+ | id | md | +----+---------------------+ | 8 | 2010-08-16 13:46:04 | | 16 | 2010-08-15 19:46:05 | | 47 | 2010-08-15 18:46:06 | | 25 | 2010-08-15 15:46:05 | | 33 | 2010-08-15 09:46:05 | | 3 | 2010-08-14 20:46:04 | | 45 | 2010-08-13 03:46:06 | | 17 | 2010-08-12 13:46:05 | | 12 | 2010-08-12 06:46:05 | | 7 | 2010-08-12 15:46:04 | | 37 | 2010-08-12 14:46:05 | | 40 | 2010-08-10 05:46:06 | | 13 | 2010-08-09 10:46:05 | | 4 | 2010-08-09 00:46:04 | | 1 | 2010-08-06 12:46:04 | | 28 | 2010-08-02 23:46:05 | | 15 | 2010-08-02 10:46:05 | | 2 | 2010-08-02 01:46:04 | | 38 | 2010-07-31 13:46:06 | | 27 | 2010-07-31 04:46:05 | | 30 | 2010-07-31 03:46:05 | | 22 | 2010-07-31 08:46:05 | | 50 | 2010-07-30 05:46:06 | | 11 | 2010-07-28 13:46:05 | | 18 | 2010-07-28 21:46:05 | | 29 | 2010-07-27 23:46:05 | | 35 | 2010-07-27 11:46:05 | | 6 | 2010-07-26 20:46:04 | | 20 | 2010-07-25 03:46:05 | | 31 | 2010-07-23 07:46:05 | | 14 | 2010-07-23 23:46:05 | | 23 | 2010-07-23 10:46:05 | | 48 | 2010-07-23 17:46:06 | | 42 | 2010-07-21 03:46:06 | | 39 | 2010-07-20 05:46:06 | | 36 | 2010-07-18 05:46:05 | | 10 | 2010-07-17 01:46:05 | | 32 | 2010-07-16 06:46:05 | | 9 | 2010-07-16 15:46:04 | | 24 | 2010-07-16 10:46:05 | | 43 | 2010-07-16 09:46:06 | | 5 | 2010-07-14 01:46:04 | | 21 | 2010-07-14 08:46:05 | | 49 | 2010-07-13 07:46:06 | | 41 | 2010-07-13 15:46:06 | | 46 | 2010-07-12 04:46:06 | | 44 | 2010-07-11 16:46:06 | | 26 | 2010-07-10 14:46:05 | | 34 | 2010-07-09 16:46:05 | | 19 | 2010-07-07 01:46:05 | +----+---------------------+ </code></pre>
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    1. POMySQL order by rand() grouped by day
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    1. COThanks mike, i've tried the same here, but there's a issue, the rand() function argument is a just seed number, don't affect the date(md) sorting
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    2. COThe 2nd query (the GROUP BY one) doesn't seem to work.
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    3. COthis gave me an idea that solved the problem select * from (SELECT * FROM table1 ORDER BY rand()) as x order by day(md);
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