Extracting a database from a large mysqldump file

Restoring a single database from a large mysql dump is pretty easy, using the mysql command line client's --one-database option:

mysql -u root -p --one-database db_to_restore < fulldump.sql
                

But what if you don’t want to restore the database, you just want to extract it out of the dump file? Well, that happens to be easy as well, thanks to the magic of sed:

sed -n '/^-- Current Database: `test`/,/^-- Current Database: `/p' fulldump.sql > test.sql