1、具体函数：
# 函数：func_split_TotalLength
DELIMITER $$
DROPfunctionIF EXISTS `func_split_TotalLength` $$
CREATEDEFINER=`root`@`%` FUNCTION`func_split_TotalLength`
(f_string varchar(1000),f_delimiter varchar(5)) RETURNSint(11)
BEGIN
# 计算传入字符串的总length
return1+(length(f_string) - length(replace(f_string,f_delimiter,'')));
END$$
DELIMITER;
# 函数：func_split
DELIMITER $$
DROPfunctionIF EXISTS `func_split` $$
CREATEDEFINER=`root`@`%` FUNCTION`func_split`
(f_string varchar(1000),f_delimiter varchar(5),f_order int) RETURNSvarchar(255) CHARSET utf8
BEGIN
# 拆分传入的字符串，返回拆分后的新字符串
declareresult varchar(255) default'';
setresult = reverse(substring_index(reverse(substring_index(f_string,f_delimiter,f_order)),f_delimiter,1));
returnresult;
END$$
DELIMITER;
# 存储过程：splitString
DELIMITER $$
DROPPROCEDUREIF EXISTS `splitString` $$
CREATEPROCEDURE`splitString`
(INf_string varchar(1000),INf_delimiter varchar(5))
BEGIN
# 拆分结果
declarecnt intdefault0;
declarei intdefault0;
setcnt = func_split_TotalLength(f_string,f_delimiter);
DROPTABLEIF EXISTS `tmp_split`;
createtemporarytable`tmp_split` (`status` varchar(128) notnull) DEFAULTCHARSET=utf8;
while i < cnt
do
seti = i + 1;
insertintotmp_split(`status`) values(func_split(f_string,f_delimiter,i));
endwhile;
END$$
DELIMITER;
2、测试是否能成功分割
call splitString("apple,banana,orange,pears,grape",",");
select* fromtmp_split;
运行结果如下，说明分割成功：
mysql> call splitString("apple,banana,orange,pears,grape",",");
select* fromtmp_split;
Query OK, 1 row affected
+--------+ | status | +--------+ | apple | | banana | | orange | | pears | | grape | +--------+ 5 rows in set
mysql>
3、应用wherein()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* fromfruit wherein(select* fromtmp_split);
以上就是利用MySQL存储过程分割字符串的方法介绍。
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