恢复数据：使用SQLServer回滚点

SQL server databases and their backups provide a powerful tool for data recovery. A SQL Server rollback point, also known as a savepoint, is a specific mark on a transaction log that allows a user to go back to that point in time without having to restore from a backup. This is useful in cases where multiple transactions have been completed, resulting in data that needs to be recovered.

Using a savepoint can be especially useful for applications that use transactions since it allows a user to undo a single transaction or a set of multiple transactions. When creating a savepoint, the transaction log is marked and users can revert back to that point in time.

To use a SQL Server rollback point, users must have the proper permissions to create and use a savepoint. Depending on the version of SQL Server, they also must have either the proper permissions to access the database or have access to a command-line utility like SQLCMD. Once the proper permissions are in place, the command to create a savepoint is similar to the following:

USE ;

GO

SAVEPOINT sp_;

If the transaction log has been marked correctly, the user can view the available rollback points using the command below:

SELECT * FROM sys.database_recovery_status

Once the desired savepoint has been identified, the user can revert back to it by executing the command below:

ROLLBACK TRANSACTION sp_

Using a SQL Server rollback point is an effective method of recovering data. It allows users to backup their application data and recover corrupt data by undoing recent transactions. Best practices state that it is important to create multiple savepoints throughout a data transaction process for quick and easy access when data needs to be recovered.

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