[mysql] Update a column value, replacing part of a string

I have a table with the following columns in a MySQL database

[id, url]

And the urls are like:

 http://domain1.com/images/img1.jpg

I want to update all the urls to another domain

 http://domain2.com/otherfolder/img1.jpg

keeping the name of the file as is.

What's the query must I run?

First, have to check

SELECT * FROM university WHERE course_name LIKE '%&amp%'

Next, have to update

UPDATE university SET course_name = REPLACE(course_name, '&amp', '&') WHERE id = 1

Results: Engineering &amp Technology => Engineering & Technology

Try using the REPLACE function:

mysql> SELECT REPLACE('www.mysql.com', 'w', 'Ww');
        -> 'WwWwWw.mysql.com'

Note that it is case sensitive.

UPDATE yourtable
SET url = REPLACE(url, 'http://domain1.com/images/', 'http://domain2.com/otherfolder/')
WHERE url LIKE ('http://domain1.com/images/%');

relevant docs: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html#function_replace

Try this...

update [table_name] set [field_name] = 
replace([field_name],'[string_to_find]','[string_to_replace]');

You need the WHERE clause to replace ONLY the records that complies with the condition in the WHERE clause (as opposed to all records). You use % sign to indicate partial string: I.E.

LIKE ('...//domain1.com/images/%');

means all records that BEGIN with "...//domain1.com/images/" and have anything AFTER (that's the % for...)

Another example:

LIKE ('%http://domain1.com/images/%')

which means all records that contains "http://domain1.com/images/"

in any part of the string...