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Schedule - a way of executing interleaved transactions.

Serializable Serial schedule - a schedule where all transactions are executed sequentially.

Serializable schedule - a schedule which is equivalent to some serial execution of interleaved transactions.

Concurrency control (CC) - a technique to preserve database consistency in case of non-serializable schedulesinterleaved transactions.

Multi-version concurrency control (MVCC) - a family of concurrency control techniques based on writing multiple record versions (copy-on-write).

Recoverable schedule - a schedule which is not affected by aborting some transactionof involved transactions. A transaction reads only committed values to achieve this.

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