We donot have space in database ,and the disk is fulled because of mdf's . how to release space on the drive
SHRINK DATABASE, SHRINK FILE, add disks, partition the data in seperate databases onto other disks, check and rebuild/reorg Indexes, use compression, spread the databases to other servers.....the Options are endless....
but most of all, learn about what you are working with! Not just the databases but also the Software that they are hosted on!