MySQL更新整个字符串的一部分？

Question

I store numeric variables in a string. Like:165,37,0,0,21

Now i have to change only the last part but keep the rest the same. (in my example i need to change 21 to 0)

Do you have any ideas?

Answer 1

我为此使用正则表达式，下面的reg ex将在字符串的末尾找到数字，包括最后一个逗号，并将其替换为'，0'

UPDATE table SET column1 = REGEXP_REPLACE(column1 , ',[0-9]*$', ',0')

Answer 2

REPLACE would be most ideal in this case:

UPDATE tbl_name 
SET 
field_name = REPLACE(field_name,
    string_to_find,  -- in your case 21
    string_to_replace  -- in your case 0 ) 
WHERE
<place condition if any e.g. the key to that record>;