Four characteristics of ACID

Atomic: The operations contained in a transaction are treated as a logical unit, and the operations in this logical unit either all succeed or all fail.

Consistency: When the transaction is completed, the data must be in a consistent state, the integrity constraints of the data are not destroyed, and an error occurs during the execution of the transaction, it will be rolled back to the state before the transaction started,As if the transaction was never executed.

Isolation: Transactions allow multiple users to concurrently access the same data without compromising the correctness and integrity of the data.At the same time, the modification of the parallel transaction must be independent of the modification of other parallel transactions.

Durability: After the transaction ends, the results of the transaction must be able to be cured.