DBCC in SQL Server

The Transact-SQL programming language provides DBCC statements that act as Database Console Commands for SQL Server.

Database Console Command statements are grouped into the following categories.

Maintenance: These commands perform maintenance tasks on a database, index, or filegroup. For example, the DBCC SHRINKFILE command can be used to reduce the size of a data file, while the DBCC INDEXDEFRAG command can be used to defragment an index.

Miscellaneous: These commands perform miscellaneous tasks such as enabling trace flags or removing a DLL from memory. For example, the DBCC TRACEON command can be used to enable a specific trace flag, while the DBCC FREESYSTEMCACHE command can be used to clear the system cache.

Informational: These commands gather and display various types of information. For example, the DBCC SQLPERF command can be used to display performance-related information for the SQL Server instance, while the DBCC SHOWCONTIG command can be used to display fragmentation information for a table or index.

Validation: These commands perform validation operations on a database, table, index, catalog, filegroup, or allocation of database pages. For example, the DBCC CHECKDB command can be used to check the integrity of a database and its objects, while the DBCC CHECKALLOC command can be used to check the consistency of the disk space allocation structures of a database.

Here is a list of some of the commonly used DBCC commands in SQL Server:

* DBCC CHECKDB

* DBCC CHECKTABLE

* DBCC CHECKALLOC

* DBCC CHECKCATALOG

* DBCC SHOWCONTIG

* DBCC SQLPERF

* DBCC DROPCLEANBUFFERS

* DBCC TRACEON

* DBCC TRACEOFF

* DBCC FREEPROCCACHE

* DBCC PINTABLE

* DBCC INDEXDEFRAG

* DBCC SHRINKDATABASE

* DBCC SHRINKFILE

* DBCC UPDATEUSAGE

Note - The list is not exhaustive and there are many other DBCC commands available in SQL Server that perform various other tasks. It's important to understand the purpose and potential impact of each command before using it in a production environment.





Comments

Post a Comment

Popular posts from this blog

COPILOT Feature in SQL Server 2025

Image
 Copilot Feature in SQL Server 2025: A Game-Changer for Database Management As organizations continue to embrace digital transformation, the demand for smarter, more efficient database management tools is growing. Enter SQL Server 2025, Microsoft's latest iteration of its flagship database system, which introduces a revolutionary feature—Copilot. Powered by advanced AI capabilities, Copilot is set to redefine how database administrators (DBAs) and developers interact with SQL Server. What is Copilot in SQL Server 2025? Copilot is an AI-powered assistant integrated into SQL Server 2025. Designed to augment productivity, it leverages natural language processing (NLP) and machine learning (ML) to assist users in managing databases, writing queries, optimizing performance, and ensuring data security. Built on Microsoft's Azure OpenAI service, Copilot brings intelligence directly into the SQL Server ecosystem. Key Features of Copilot Natural Language Querying : Users can write quer...
Read more

Accelerated Database Recovery (ADR) in SQL Server

Image
Accelerated Database Recovery (ADR) is one of the most transformative features in recent SQL Server releases, and with SQL Server 2025, it’s more powerful and flexible than ever. ADR is a SQL Server feature designed to drastically improve database availability by reengineering the recovery process. Traditional recovery could take a long time, especially with long-running transactions, because SQL Server had to scan the transaction log from the oldest uncommitted transaction. ADR changes this by introducing a new architecture that makes recovery and rollback nearly instantaneous, regardless of transaction length or database activity. Key Benefits : Fast and consistent recovery : Recovery time is no longer affected by the number or size of active transactions. Instantaneous rollback : Even very long-running transactions can be rolled back instantly. Aggressive log truncation : The transaction log is truncated more aggressively, preventing log growth even with active long transactions. H...
Read more

Standard Developer and Enterprise Developer edition in SQL Server 2025

Standard Developer and Enterprise Developer edition in SQL Server 2025 In SQL Server 2025, two new Developer editions are introduced: Standard Developer and Enterprise Developer. These editions are designed for development and testing purposes and are licensed for free. The Standard Developer edition includes all the features of the Standard edition, while the Enterprise Developer edition offers the complete functionality of the Enterprise edition.  Standard Developer Edition Free licensing: It can be used without incurring any licensing costs.  Matches Standard edition: It mirrors the features and capabilities of the SQL Server Standard edition.  Ideal for teams: It's particularly valuable for teams whose production workloads run on Standard edition.  Narrowing the gap: It helps to minimize the difference between development and production environments, especially for applications that rely on Standard or Web/Express editions.  Improves code predictability: It ...
Read more