如何在MySQL中将字符串附加到现有字段? [英] How can I append a string to an existing field in MySQL?

问题描述

我想将所有记录上的代码更新为当前的代码，再加上_standard任何想法?

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，则我需要将它们设置为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

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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