How Can I Replace Part of a String in a MySQL Column While Updating?

MySQL database column value partial string replacement update

MySQL provides powerful functionality that allows users to modify column values ​​by replacing specific parts of strings. This feature is particularly useful in scenarios where data needs to be updated without affecting certain elements in the string.

Suppose you have a MySQL database table with two columns: "id" and "url". The "url" column contains URLs with a specific structure, similar to:

<code>http://domain1.example/images/img1.jpg</code>

However, you want to modify all URLs to point to different domains while retaining the filenames. The required URL should look like this:

<code>http://domain2.example/otherfolder/img1.jpg</code>

To do this, you can use the following SQL query:

<code class="language-sql">UPDATE urls
SET url = REPLACE(url, 'domain1.example/images/', 'domain2.example/otherfolder/')</code>

The "REPLACE()" function in MySQL replaces a specified substring in a string. In this example, we instruct MySQL to replace any occurrences of the substring 'domain1.example/images/' with 'domain2.example/otherfolder/'.

By executing this query, you will successfully replace the portion of the string containing 'domain1.example/images/' with 'domain2.example/otherfolder/', effectively updating all URLs with the desired domain and retaining Original file name.

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