(转)MySQL中利用存储过程分割字符串的方法

menny

现有一段字符串，如apple,banana,orange,pears,grape，要把它按照逗号(,)分割成：applebananaorangepearsgrape然后使用where in()方法可以查询。1、具体函数：# 函数：func_split_TotalLength DELIMITER $$ DROP function IF EXISTS `func_split_TotalLength` $$ CREATE DEFINER=`root`@`%` FUNCTION `func_split_TotalLength` (f_string varchar(1000),f_delimiter varchar(5)) RETURNS int(11) BEGIN # 计算传入字符串的总length return 1+(length(f_string) - length(replace(f_string,f_delimiter,''))); END$$ DELIMITER; # 函数：func_split DELIMITER $$ DROP function IF EXISTS `func_split` $$ CREATE DEFINER=`root`@`%` FUNCTION `func_split` (f_string varchar(1000),f_delimiter varchar(5),f_order int) RETURNS varchar(255) CHARSET utf8 BEGIN # 拆分传入的字符串，返回拆分后的新字符串 declare result varchar(255) default ''; set result = reverse(substring_index(reverse(substring_index(f_string,f_delimiter,f_order)),f_delimiter,1)); return result; END$$ DELIMITER; # 存储过程：splitString DELIMITER $$ DROP PROCEDURE IF EXISTS `splitString` $$ CREATE PROCEDURE `splitString` (IN f_string varchar(1000),IN f_delimiter varchar(5)) BEGIN # 拆分结果 declare cnt int default 0; declare i int default 0; set cnt = func_split_TotalLength(f_string,f_delimiter); DROP TABLE IF EXISTS `tmp_split`; create temporary table `tmp_split` (`status` varchar(128) not null) DEFAULT CHARSET=utf8; while i  call splitString("apple,banana,orange,pears,grape",",");select * from tmp_split;Query OK, 1 row affected+--------+| status |+--------+| apple  || banana || orange || pears  || grape  |+--------+5 rows in setmysql>3、应用where in()查询# 先传入字符串，分割后保存在临时表tmp_split中 call splitString("apple,banana,orange,pears,grape",","); # 将查询的结果作为其他查询的条件来使用 select * from fruit where in(select * from tmp_split);