What is a DBCC?
DBCC is the SQL Server “database consistency checker.” DBCC helps ensure the physical and logical consistency of a database; however, DBCC is not corrective. In short, DBCC is an acronym for Database Console Command, and it seems more of a documentation mistake when it was called Database Consistency Checker.
What are DBCC commands and what are they used for?
Microsoft SQL Server Database Console Commands (DBCC) are used for checking database integrity; performing maintenance operations on databases, tables, indexes, and filegroups; and collecting and displaying information during troubleshooting issues.
What is the use of DBCC in SQL Server?
Tasks that gather and display various types of information. Validation operations on a database, table, index, catalog, filegroup, or allocation of database pages. DBCC commands take input parameters and return values. All DBCC command parameters can accept both Unicode and DBCS literals.
What kind of recovery models are there in SQL Server?
Three recovery models exist: simple, full, and bulk-logged. Typically, a database uses the full recovery model or simple recovery model. A database can be switched to another recovery model at any time.
What is update usage in SQL Server?
Solution. Procedure sp_spaceused is a system stored procedure that is provided with SQL Server to report on database table and index space allocation (total rows, data space used, index space used, etc).
Can a DBCC checkdb be run on a resource database?
Because the Resource database is modifiable only in single-user mode, the DBCC CHECKDB command cannot be run on it directly. However, when DBCC CHECKDB is executed against the master database, a second CHECKDB is also run internally on the Resource database.
What causes DBCC checkdb to run faster than SQL Server?
Causes DBCC CHECKDB to obtain locks instead of using an internal database snapshot. This includes a short-term exclusive (X) lock on the database. TABLOCK will cause DBCC CHECKDB to run faster on a database under heavy load, but decreases the concurrency available on the database while DBCC CHECKDB is running.
How are error messages displayed in DBCC checkdb?
Displays all reported errors per object. All error messages are displayed by default. Specifying or omitting this option has no effect. Error messages are sorted by object ID, except for those messages generated from tempdb database.