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10 content recommendations for PHP + MySQL

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怪我咯Original
2017-06-14 13:51:181477browse

Transaction is a program execution unit that accesses and may update various data items in the database; a transaction should have four attributes: atomicity, consistency, isolation, and persistence atomicity. A transaction is an indivisible unit of work. All operations included in the transaction are either done or none of them are done. Consistency. A transaction must change the database from one consistency state to another. Consistency and atomicity are closely related. Isolation. The execution of a transaction cannot be interfered with by other transactions. That is, the operations and data used within a transaction are isolated from other concurrent transactions, and transactions executed concurrently cannot interfere with each other. Durability. Continuity, also known as permanence, means that once a transaction is committed, its changes to the data in the database should be permanent. Subsequent operations or failures should not have any impact on it. Distributed transactions: Participants, resource managers, transaction managers, etc. of distributed transactions are located on different nodes. These different nodes cooperate with each other to complete a task.

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10 content recommendations for PHP + MySQL

##Introduction: Transaction is an access to and possibly update of the database A program execution unit for various data items; transactions should have four attributes: atomicity, consistency, isolation, and persistence atomicity. A transaction is an indivisible unit of work. All operations included in the transaction are either done or none of them are done. Consistency. A transaction must change the database from one consistency state to another. Consistency and atomicity are closely related. Isolation. Execution of a transaction...

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10 content recommendations for PHP + MySQL

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10 content recommendations for PHP + MySQL

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10 content recommendations for PHP + MySQL

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