How can MySQL replace part of the characters in a field?

In MySQL, you can use the REPLACE function to replace certain characters in a field. The syntax for the REPLACE function is as follows:

REPLACE(str, old_substring, new_substring)

In this case, str is the string to be replaced, old_substring is the substring to be replaced, and new_substring is the new string for replacement.

Below is an example demonstrating how to use the REPLACE function to replace some characters in a field.

If there is a table named users with a field named email, and we want to replace “example” with “newexample” in all the emails, we can use the following statement:

UPDATE users SET email = REPLACE(email, 'example', 'newexample');

After executing the above statement, all strings containing “example” in the email field will be replaced with “newexample”.