Transaction-Level Atomicity-Level Atomicity-Transactions
The entire goal of a transaction, a set of SQL statements executed together as a unit of work, is to take […]
Read More →The entire goal of a transaction, a set of SQL statements executed together as a unit of work, is to take […]
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This is generally considered the most restrictive level of transaction isolation, but it provides the highest degree of isolation. A SERIALIZABLE […]
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Autonomous transactions allow you to create a “transaction within a transaction” that will commit or roll back changes independently of its […]
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READ ONLY transactions are very similar to SERIALIZABLE transactions, the only difference being that they do not allow modifications, so they […]
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A common data warehousing technique I’ve seen people employ goes like this: \ 1.\ They use a trigger to maintain a […]
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The goal of REPEATABLE READ is to provide an isolation level that gives consistent, correct answers and prevents lost updates. We’ll […]
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The ANSI/ISO SQL standard defines four levels of transaction isolation, with different possible outcomes for the same transaction scenario. That is, […]
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The Oracle database has supported autonomous transactions internally for quite a while. We see them all of the time in the […]
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A common use of REPEATABLE READ in databases that employ the shared read locks could be for lost update prevention. Note […]
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Concurrency controls are the collection of functions that the database provides to allow many people to access and modify data simultaneously. […]
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