mysql怎么按特定id排序

WBOY

Lepaskan： 2016-06-13 12:49:00

asal

1771 orang telah melayarinya

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');

Salin selepas log masuk

------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

Salin selepas log masuk

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