mysql 实现切割字符串

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, '');

#用法：SELECT SPLIT_STR(string, delimiter, position)
#注意position 从1开始
update same_ccc_product set brand_name = SPLIT_STR(product_name,' ',1)