mysql更改列中的所有值 [英] mysql change all values in a column

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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