如何更新数据库记录并仍然将旧值保留在MySQL中? [英] How to update a database record and still keep the old values in MySQL?

问题描述

我想通过在旧值旁边添加新值来更新列.因此，如果列"fruits"的值为"apples"，并且运行查询，则其值应为"apples，oranges".

I want to update a column by adding a new value alongside the old ones. So if column "fruits" has a value of "apples" and I run my query it should then have a value of "apples, oranges".

现在，当我执行更新语句时

Right now when I do an update statement"

UPDATE tableName SET fruits='oranges' WHERE id=1;

它只是用橘子盖住了苹果.我如何才能将新值与旧值(用逗号分隔)一起添加?

It just overwrites apples with oranges. How can I get it to ADD the new value alongside the old separated by commas?

推荐答案

UPDATE tableName SET fruits=CONCAT(fruits, ', oranges') WHERE id=1;

或:

UPDATE tableName SET fruits=CONCAT_WS(', ', fruits, 'oranges') WHERE id=1;

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