MySQL 6.0 有严重的 BUG!
仔细对比以下三句的区别,返回的行数就是不同:
(在 MySQL 5.0 和 5.1 中都是返回 1 行) 
由于 MySQL 6.0 尚处于开发测试阶段,建议朋友们暂时不要升级到该版本.

SELECT *
FROM `con_shipment`
WHERE `productsnumber` = '58161-169670'
ORDER BY `shipmentid` ; # MySQL 返回的查询结果为空(即零行)。


SELECT *
FROM `con_shipment`
WHERE `productsnumber` = '58161-169670'; # 行数: 1


SELECT `shipmentid` , `productsnumber`
FROM `con_shipment`
WHERE `productsnumber` = '58161-169670'
ORDER BY `shipmentid` ; # 行数: 1