使用 SQL UPDATE 查询替换所有行的列值中的子字符串

发布于 2024-09-27 11:42:54 字数 290 浏览 2 评论 0原文

这是一个示例表：

name       |   picture

John S.    |   http://servera.host.com/johns.png
Linda B.   |   http://servera.host.com/lindab.png
...

假设还有数百条记录。

假设我们将服务器从“servera”移动到“serverb”。

是否可以使用一个查询进入此表，为每条记录重命名“图片”列中的内容，以读取正确的服务器名称？

原文

Here's a sample table:

name       |   picture

John S.    |   http://servera.host.com/johns.png
Linda B.   |   http://servera.host.com/lindab.png
...

Let's say there are several hundred more records.

Let's also say we moved servers from "servera" to "serverb".

Would it be possible to go into this table with one query to rename the content in the column "picture" for every record to read the correct server name?

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慵挽 2024-10-04 11:42:54

T-SQL：

update TBL 
   set picture = Replace(picture, 'servera', 'serverb') 
 where picture like '%servera%'

Oracle：

update TBL 
   set picture = replace(picture, 'servera', 'serverb') 
 where picture like '%servera%'

MySQL：

update TBL 
   set picture = REPLACE(picture, 'servera', 'serverb') 
 where picture like '%servera%'

T-SQL:

update TBL 
   set picture = Replace(picture, 'servera', 'serverb') 
 where picture like '%servera%'

Oracle:

update TBL 
   set picture = replace(picture, 'servera', 'serverb') 
 where picture like '%servera%'

MySQL:

update TBL 
   set picture = REPLACE(picture, 'servera', 'serverb') 
 where picture like '%servera%'

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软糯酥胸 2024-10-04 11:42:54

UPDATE users
SET picture = REPLACE(picture, 'http://servera.host.com/', 'http://serverb.host.com/')
WHERE picture LIKE 'http://servera.host.com/%';

我包含了更多的字符串，因为我担心“修复”名为“somethingserverasomething.jpg”的图像。我可能还会考虑拥有一个 base_url 表并仅在用户中存储图像文件名，但这不是您问的问题;-)

UPDATE users
SET picture = REPLACE(picture, 'http://servera.host.com/', 'http://serverb.host.com/')
WHERE picture LIKE 'http://servera.host.com/%';

I'm including more of the string because I'd worry about 'fixing' an image named 'somethingserverasomething.jpg'. I might also think about having a base_url table and just storing image file names in users, but that's not the question you asked ;-)

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~没有更多了~