mysql如何按特定id排序
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2024-02-16 21:04:46
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mysql如何按特定id排序
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
SET FOREIGN_KEY_CHECKS=0;-- ------------------------------ Table structure for `p`-- ----------------------------DROP TABLE IF EXISTS `p`;CREATE TABLE `p` ( `id` int(11) NOT NULL auto_increment, `name` varchar(255) default NULL, `categories_id` int(11) default NULL, PRIMARY KEY (`id`)) ENGINE=MyISAM AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;-- ------------------------------ Records of p-- ----------------------------INSERT INTO `p` VALUES ('1', 'jimmy', '2');INSERT INTO `p` VALUES ('2', 'tina', '2');INSERT INTO `p` VALUES ('3', 'dd', '2');INSERT INTO `p` VALUES ('4', 'hello', '2');INSERT INTO `p` VALUES ('5', 'world', '2');INSERT INTO `p` VALUES ('6', 'slucky', '2');SET FOREIGN_KEY_CHECKS=0;-- ------------------------------ Table structure for `p_sort`-- ----------------------------DROP TABLE IF EXISTS `p_sort`;CREATE TABLE `p_sort` ( `categories_id` int(10) NOT NULL default '0', `best_sort_person_id` varchar(100) default NULL, PRIMARY KEY (`categories_id`)) ENGINE=MyISAM DEFAULT CHARSET=utf8;-- ------------------------------ Records of p_sort-- ----------------------------INSERT INTO `p_sort` VALUES ('2', '2,5,1');
回复讨论(解决方案)
select * from p, p_sort 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
谢谢xuzuning老师,狂亲
SELECT p.* FROM p INNER JOIN p_sort s ON p.categories_id=s.categories_id ORDER BY IF(FIND_IN_SET(id,s.best_sort_person_id)>0,FIND_IN_SET(id,s.best_sort_person_id),id) ASC ;
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