JDBC specification 3.0

авторBatch Updates
The batch update facility allows multiple update operations to be submitted to a
data source for processing at once. Submitting multiple updates together, instead of
individually, can greatly improve performance. Statement, PreparedStatement,
and CallableStatement objects can be used to submit batch updates.
15.1 Description of Batch Updates
15.1.1 Statements
The batch update facility allows a Statement object to submit a set of
heterogeneous update commands together as a single unit, or batch, to the
underlying data source.
Since the JDBC 2.0 API, a Statement object has had the ability to keep track of a list
of commands—or batch—that can be submitted together for execution. When a
Statement object is created, its associated batch is empty. An application adds
commands to a statement’s batch one at a time by calling the method
Statement.addBatch and providing it with the SQL update command to be
added. All of the commands added to a batch must be statements that return an
update count.
If an application decides not to submit a batch of updates that has been constructed
for a statement, it can call the method Statement.clearBatch to clear the batch
of all commands.
In CODE EXAMPLE 15-1, all of the update operations required to insert a new
employee into a fictitious company database are submitted as a single batch.