Sometimes you may find your SQL Server database is performing at suboptimal levels. After a lot of use, especially in a production environment, your database will have endured a high number of transactions, object creation and drops, and these can lead to fragmentation of the data at the disk level. You may also find that your database is quite large, but it has some empty space. However, when you attempt to shrink the database, you cannot do it. In this case, a common culprit is fragmentation.