Submit a malformed SQL statement that breaks The following example illustrates the use of a commit and rollback object − Otherwise, to roll back updates to the database made using the Connection named conn, use the following code − Once you are done with your changes and you want to commit the changes then call commit() method on connection object as follows − You can pass a boolean true to turn it back on again.įor example, if you have a Connection object named conn, code the following to turn off auto-commit − If you pass a boolean false to setAutoCommit( ), you turn off auto-commit. To enable manual- transaction support instead of the auto-commit mode that the JDBC driver uses by default, use the Connection object's setAutoCommit() method. It treats a single SQL statement or a group of SQL statements as one logical unit, and if any statement fails, the whole transaction fails.

Transactions enable you to control if, and when, changes are applied to the database. To maintain the integrity of business processes. That may be fine for simple applications, but there are three reasons why you may want to turn off the auto-commit and manage your own transactions − If your JDBC Connection is in auto-commit mode, which it is by default, then every SQL statement is committed to the database upon its completion.

Roll back java update