Question

I have a table for tags. Since some users have done copy-paste from our website the some tags occur with count numbers at the end, like so:

Tag1
Tag1 (5)
Tag2
Tag1 (7)

As far as i know, mysql doesn’t support regex replace, so how can i remove these?

I don’t want to do it with php cause the table is large, and i’d like to run it regulary.

Expected end result:

Tag1
Tag1
Tag2
Tag1

Cheers!

Answer 1

You can achive this by using string functions:

SELECT TRIM(SUBSTRING(tag, 1, (CHAR_LENGTH(tag) - LOCATE('(', REVERSE(tag))))) AS new_tag
FROM table_name;

SQLFIDDLE DEMO HERE