Help with query that changes values right in the db - mysql

Question

I recently migrated domains and in my database, I had stored full paths containing the old domain, which now broke :)
What I need to do is change values in the database table from
http://www.olddomain.com/img/some/path
to
http://www.newdomain/same/dir/structure/as/old/domain
The only caveat is that the photo names at the end of the url must be preserved. So essentially, I have to just change the host name.
Is that possible to do? If so, how? :)

Answer 1

Try this:
UPDATE table SET column = REPLACE(column,"www.olddomain.com","www.newdomain.com");
ALWAYS make sure you do a backup of your database before running a query that updates many records (as this will).

Answer 2

With a MySQL database, do this on the command line:
1 - Put full DB in a file:
mysqldump -uYOURUSERNAME -pYOURPASSWORD YOURDBNAME > YOURDBNAME.sql
2 - Replace olddomain.com with newdomain.com in the previous DB file:
sed -i 's/olddomain.com/newdomain.com/g' YOURDBNAME.sql
3 - Delete all tables in original database (make sure you have a backup), and update database with replaced domain in all rows of all tables, where applicable:
mysql -uYOURUSERNAME -pYOURPASSWORD YOURDBNAME < YOURDBNAME.sql
This is guaranteed to work. I've used this to update domains on Magento databases (300+ tables) several times.
FYI, sed is a linux/unix command line tool for "filtering and transforming text", I don't know if there is a windows version.
PS - If you really need to put slashes (/) in the domain (like if you're replacing www.example.com/sitedir with www.example.com), you should escape the slashes inside the sed string, i.e. instead of using /, use \/. For this example you would do:
sed -i 's/www.example.com\/sitedir/www.example.com/g' YOURDBNAME.sql