The DBCC utilities ensure database integrity.
The database consistency checker (DBCC) utilities are a collection of programs used to verify integrity of a SQL Server database. They are conceptually similar to file system checking programs such as chkdsk in MS-DOS, Windows 95, and Windows NT, and fsck in UNIX. Like file system checking programs, DBCC can take a significant amount of time to run on large data sets. This article discusses ways to improve DBCC performance.