Controls the transaction mode in the absence of a BEGIN TRANSACTION statement.

Allowed values

On, Off

Default

On

Off for Open Client and jConnect connections

Remarks

Controls the Transact-SQL transaction mode. In Unchained mode (chained=Off), each statement is committed individually unless an explicit BEGIN TRANSACTION statement is executed to start a transaction. In chained mode (chained=On) a transaction is implicitly started before any data retrieval or modification statement.