December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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Serialization and Key-Range Locking
As mentioned in the previous section, SQL Server provides serialization (Isolation Level 3) through the SET TRANSACTION ISOLATION SERIALIZABLE command. One of the isolations provided by this isolation level is the prevention against phantom reads. Preventing phantom reads means that the recordset that a query obtains within a transaction must return the same result set when it is run multiple times within the same transaction. That is, while a transaction is active, another transaction should not be allowed to insert new rows that would appear in the recordset of a query that were not in the original recordset retrieved by the transaction. SQL Server provides this capability though key-range locking.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.