October 2006
Intermediate to advanced
464 pages
16h 11m
English
Content preview from Inside Microsoft® SQL Server™ 2005, Fourth EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Summary
In addition to one or more data files, every database in a SQL Server instance has one or more log files that keep track of changes to that database. (In SQL Server 2005, database snapshots do not have log files because no changes are ever made directly to a snapshot.) SQL Server uses the transaction log to guarantee consistency of your data, at both a logical and a physical level. In addition, an administrator can make backups of the transaction log to make restoring a database more efficient. An administrator or database owner can also set a database’s recovery mode to determine the level of detail stored in the transaction log.
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