如何将字符串附加到 MySQL 中的现有字段?

2021-11-16 00:00:00 string append sql mysql

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

伪查询:

update categories set code = code + "_standard" where id = 1;

预期结果:

id   code
----------------------
1    apple_1_standard 
1    apple_2_standard

推荐答案

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;

相关文章