我想将我所有记录上的代码更新为当前的代码,以及 _standard 有什么想法吗?
I want to update the code on all my record to what they currently are plus _standard any ideas?
例如,如果代码是 apple_1 和 apple_2,我需要它们是 apple_1_standard 和 apple_2_standard
So for example if the codes are apple_1 and apple_2 I need them to be apple_1_standard and apple_2_standard
id code
------------
1 apple_1
1 apple_2
update categories set code = code + "_standard" where id = 1;
id code
----------------------
1 apple_1_standard
1 apple_2_standard
您需要使用 CONCAT()
MySQL 中用于字符串连接的函数:
You need to use the CONCAT()
function in MySQL for string concatenation:
UPDATE categories SET code = CONCAT(code, '_standard') WHERE id = 1;
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