How to recover data from logs in SQL Server?

2 years ago
Isabella Edwards
2 minutes

In SQL Server, you can recover data from the log using the following steps:

  1. Firstly, make sure that the recovery mode of the database is set to “Full Recovery Mode” so that the database will record complete transaction logs.
  2. Perform a full backup to ensure that the initial state of the database has been backed up.
  3. To restore to a specific point in time or before a certain transaction, you can use either a differential backup or a transaction log backup.
  4. Perform a transaction log backup to capture all transaction logs before the specified recovery point.
  5. The process of restoring a database involves sequentially applying full backups, all relevant differential backups, and transaction log backups to the database.
  6. Execute the following SQL statement to perform the recovery operation:
RESTORE DATABASE [数据库名称] FROM DISK = '备份文件路径' WITH NORECOVERY;
  1. Apply the backup files sequentially using the following SQL statement if there are differential backup files or transaction log backup files.
RESTORE DATABASE [数据库名称] FROM DISK = '差异备份文件路径' WITH NORECOVERY;
或
RESTORE LOG [数据库名称] FROM DISK = '事务日志备份文件路径' WITH NORECOVERY;
  1. Finally, use the following SQL statement to restore the database to a usable state:
RESTORE DATABASE [数据库名称] WITH RECOVERY;

The above steps can be performed in SQL Server Management Studio (SSMS) using the graphical interface or by using SQL statements. It is important to fully understand the recovery process before executing it, especially when recovering in a production environment, caution must be taken.

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