mysql如何按特定id排序

mysql如何按特定id排序 我想讲数据按某些特定id排前面，怎么做到？

Sql代码 收藏代码

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');