name : start-transaction.rst **To start new transaction** The following ``start-transaction`` example starts a new transaction and returns its transaction ID. :: aws lakeformation start-transaction \ --transaction-type = 'READ_AND_WRITE' Output:: { "TransactionId": "b014d972ca8347b89825e33c5774aec4" } For more information, see `Reading from and writing to the data lake within transactions <https://docs.aws.amazon.com/lake-formation/latest/dg/transaction-ops.html>`__ in the *AWS Lake Formation Developer Guide*.