Can MySQL Replace Multiple Characters?


Answer :

You can chain REPLACE functions:

select replace(replace('hello world','world','earth'),'hello','hi')

This will print hi earth.

You can even use subqueries to replace multiple strings!

select replace(london_english,'hello','hi') as warwickshire_english from (     select replace('hello world','world','earth') as london_english ) sub

Or use a JOIN to replace them:

select group_concat(newword separator ' ') from (     select 'hello' as oldword     union all     select 'world' ) orig inner join (     select 'hello' as oldword, 'hi' as newword     union all     select 'world', 'earth' ) trans on orig.oldword = trans.oldword

I'll leave translation using common table expressions as an exercise for the reader ;)


Cascading is the only simple and straight-forward solution to mysql for multiple character replacement.

UPDATE table1  SET column1 = replace(replace(REPLACE(column1, '\r\n', ''), '<br />',''), '<\r>','')

I've been using lib_mysqludf_preg for this which allows you to:

Use PCRE regular expressions directly in MySQL

With this library installed you could do something like this:

SELECT preg_replace('/(\\.|com|www)/','','www.example.com');

Which would give you:

example

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