What does transaction mean in MySQL? Explain its properties?

#A transaction is a set of database operations performed sequentially, as if it were a single unit of work. In other words, the transaction will never complete unless every operation within the group succeeds. If any operation in the transaction fails, the entire transaction fails. In fact, we can group many SQL queries into a group and execute them together as part of a transaction.

Properties of transactions

Transactions have the following four standard properties, usually represented by the ACID abbreviation:

• Atomicity - Ensure unit of work All operations within the transaction complete successfully; otherwise, the transaction is aborted at the point of failure and previous operations are rolled back to their previous state.
• Consistency - Ensures that the database correctly changes state after successfully committing a transaction.
• Isolation - Enables transactions to operate independently and be transparent to each other.
• Persistence - Ensures that the results or effects of committed transactions persist in the event of system failure.

The above is the detailed content of What does transaction mean in MySQL? Explain its properties?. For more information, please follow other related articles on the PHP Chinese website!