本文介绍了mysql更改列中的所有值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想更改表列"Quellendatum"中的所有值.
I want to change all values in the tablecolumn "Quellendatum".
当行值为2005-06-20时,应将其替换为2012-06-20.当行值为NULL或为空时,则应保持不变.
When the row-value is 2005-06-20 then it should be replaced with 2012-06-20.When the row-value is NULL or empty, then it should be untouched.
当前,我通过选择以下行对此进行手动修改:
Currently i modify this manually by selecting the row:
UPDATE `outgoing2`.`tbl_hochschule`
SET `Quellendatum` = '2012-06-20'
WHERE `tbl_hochschule`.`id` =1;
有没有办法自动执行此任务?
Is there a way to automate this task?
推荐答案
怎么样:
UPDATE outgoing2.tbl_hochschule
SET Quellendatum = '2012-06-20'
WHERE Quellendatum = '2005-06-20'
AND !isnull( Quellendatum );
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