REGEX_REPLACE in mySQL everything inside character with its value

Question

I'd like to replace a text field in mysql using REGEX_REPLACE.

My string looks like this:

Hi friends @[Friendly User <user@contoso.com>], what are you doing?

What I want is, to remove everything inside the brackets [] and except the text inside the <> .

So the output should look like this:

Hi friends @user@contoso.com, what are you doing?

My SQL Code:

UPDATE `Chat`
SET `Text` = REGEXP_REPLACE(`Text`, '\<(.*?)\>', 'text inside <>');

Link to dbfiddle:

https://dbfiddle.uk/?rdbms=mariadb_10.5&fiddle=f930852c6bf05fbb31125f42852093f9

Answer 1

UPDATE `Chat`
SET `Text` = REGEXP_REPLACE(`Text`, '\\[.*\<(.*?)\>.*\\]', '\\1');

\\1 is an escaped \1 to reference the first capture groups value. You can use that to reference the captured value in the replacement. I modified your regex to match the brackets as well.