MySQL 数组数据类型，拆分字符串，
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Array data type, split string,
提问by gumpi
I'm currently working on a function in MYSQL, I have a comma delimited string (1,22,344,55) from another table, How can I split this in MYSQL to an array (NOT temp_table). Also, is there a similar function in MYSQL where I can do foreach()?
我目前正在 MYSQL 中处理一个函数，我有一个来自另一个表的逗号分隔字符串 (1,22,344,55)，我如何将它在 MYSQL 中拆分为一个数组（不是 temp_table）。另外，在 MYSQL 中是否有类似的功能，我可以在其中执行 foreach()？
回答by Roman Goyenko
MySQL does not include a function to split a delimited string. However, it's very easy to create your own function.
MySQL 不包含拆分分隔字符串的函数。但是，创建自己的函数非常容易。
CREATE FUNCTION SPLIT_STR(
x VARCHAR(255),
delim VARCHAR(12),
pos INT
)
RETURNS VARCHAR(255)
RETURN REPLACE(SUBSTRING(SUBSTRING_INDEX(x, delim, pos),
LENGTH(SUBSTRING_INDEX(x, delim, pos -1)) + 1),
delim, '');
Usage
用法
SELECT SPLIT_STR(string, delimiter, position)
From here: http://blog.fedecarg.com/2009/02/22/mysql-split-string-function/
从这里：http: //blog.fedecarg.com/2009/02/22/mysql-split-string-function/
回答by Luxo Mansilla
The correct usage in MySQL is:
MySQL中的正确用法是：
SELECT FIND_IN_SET('b','a,b,c,d');
Gives as result: 2
结果给出：2
