mysql存储过程下分割字符串函数

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 < cnt 
do 
    set i = i + 1; 
    insert into tmp_split(`status`) values (func_split(f_string,f_delimiter,i)); 
end while; 
END$$ 
DELIMITER; 
2、测试是否能成功分割
call splitString("apple,banana,orange,pears,grape",","); 
select * from tmp_split; 
 
 
运行结果如下，说明分割成功：
mysql> 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 set   
mysql> 
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);   
以上就是利用MySQL存储过程分割字符串的方法介绍。