mysql如何按特定id排序
mysql如何按特定id排序
SET FOREIGN_KEY_CHECKS=0;<br>
<br>
-- ----------------------------<br>
-- Table structure for `p`<br>
-- ----------------------------<br>
DROP TABLE IF EXISTS `p`;<br>
CREATE TABLE `p` (<br>
`id` int(11) NOT NULL auto_increment,<br>
`name` varchar(255) default NULL,<br>
`categories_id` int(11) default NULL,<br>
PRIMARY KEY (`id`)<br>
) ENGINE=MyISAM AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;<br>
<br>
-- ----------------------------<br>
-- Records of p<br>
-- ----------------------------<br>
INSERT INTO `p` VALUES ('1', 'jimmy', '2');<br>
INSERT INTO `p` VALUES ('2', 'tina', '2');<br>
INSERT INTO `p` VALUES ('3', 'dd', '2');<br>
INSERT INTO `p` VALUES ('4', 'hello', '2');<br>
INSERT INTO `p` VALUES ('5', 'world', '2');<br>
INSERT INTO `p` VALUES ('6', 'slucky', '2');<br>
<br>
<br>
SET FOREIGN_KEY_CHECKS=0;<br>
<br>
-- ----------------------------<br>
-- Table structure for `p_sort`<br>
-- ----------------------------<br>
DROP TABLE IF EXISTS `p_sort`;<br>
CREATE TABLE `p_sort` (<br>
`categories_id` int(10) NOT NULL default '0',<br>
`best_sort_person_id` varchar(100) default NULL,<br>
PRIMARY KEY (`categories_id`)<br>
) ENGINE=MyISAM DEFAULT CHARSET=utf8;<br>
<br>
-- ----------------------------<br>
-- Records of p_sort<br>
-- ----------------------------<br>
INSERT INTO `p_sort` VALUES ('2', '2,5,1');------解决方案--------------------
select * from p, p_sort<br> order by find_in_set(p.id, p_sort.best_sort_person_id)>0 desc, find_in_set(p.id, p_sort.best_sort_person_id) asc, id
find_in_set(p.id, p_sort.best_sort_person_id)>0 desc 用于将id=2,5,1的排在前面
find_in_set(p.id, p_sort.best_sort_person_id) asc 用于将id=2,5,1的按出现次序排列
