extract value using regular expression in mysql

I am storing values in database like this

www/content/lessons/40/Digital Library/document1.doc
开发者_运维技巧

I need to extract the file document.doc.

How to retrieve this value from mysql using regular expression.

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you not need to use regexp (low performence) use substring_index instead

SELECT SUBSTRING_INDEX('bbb/bbbbbb/bbbbbbbbb/bbbb', '/', -1);

link :

http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_substring-index

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Mysql does not provide regex based extraction from strings, but you can extend mysql to do this:

https://github.com/mysqludf/lib_mysqludf_preg

It's not a good solution for a lot of people though. eg you couldn't use it in a shared hosting environment.