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Oracle Database Transactions and Locking Revealed by Darl Kuhn, Thomas Kyte

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CHAPTER 2

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Locking and Issues

One of the key challenges in developing multiuser, database-driven applications is to maximize concurrent access and, at the same time, ensure that each user is able to read and modify the data in a consistent fashion. The locking mechanisms that allow this to happen are key features of any database, and Oracle excels in providing them. However, Oracle’s implementation of these features is specific to Oracle—just as SQL Server’s implementation is to SQL Server—and it is up to you, the application developer, to ensure that when your application performs data manipulation, it uses these mechanisms correctly. If you fail ...

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