mysql 更改列中的所有值
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mysql change all values in a column
提问by StandardNerd
I want to change all values in the tablecolumn "Quellendatum".
我想更改表列“Quellendatum”中的所有值。
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.
当行值为 2005-06-20 时，应将其替换为 2012-06-20。当 row-value 为 NULL 或为空时，它应该保持不变。
Currently i modify this manually by selecting the row:
目前我通过选择行手动修改它：
UPDATE `outgoing2`.`tbl_hochschule`
SET `Quellendatum` = '2012-06-20'
WHERE `tbl_hochschule`.`id` =1;
Is there a way to automate this task?
有没有办法自动化这个任务？
采纳答案by ethrbunny
How about:
怎么样：
UPDATE outgoing2.tbl_hochschule
SET Quellendatum = '2012-06-20'
WHERE Quellendatum = '2005-06-20'
AND !isnull( Quellendatum );
回答by LucianoDemuru
In MySql you can do:
在 MySql 中，您可以执行以下操作：
UPDATE TABLENAME
SET IDCOLUMN=VALUE
WHERE IDCOLUMN=VALUE
AND !isnull (IDCOLUMN)
回答by Devang Rathod
it should be :
它应该是 ：
UPDATE tablename
SET Quellendatum = '2012-06-20'
WHERE Quellendatum = '2005-06-20'
回答by Kautil
UPDATE outgoing2.tbl_hochschule
SET Quellendatum = '2012-06-20'
WHERE Quellendatum <> '' AND Quellendatum <> NULL;
