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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Transaction Log Basics
The transaction log records changes made to the database and stores enough information to allow SQL Server to recover the database. As we’ll see later in this chapter, the recovery process takes place every time a SQL Server instance is started, and it can optionally take place every time SQL Server restores a database or a log from backup. Recovery is the processing of reconciling the data files and the log files. Any changes to the data that the log indicates have been committed must appear in the data files, and any changes that are not marked as committed must not appear in the data files. The log also stores information needed to roll back an operation if SQL Server receives a request to roll back a transaction from ...
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