Data Manipulation Language (DML) Database Methods
All database operations in Apex are transactional. For example, an implicit transaction is created when a trigger fires. If the code in a trigger completes without error, DML operations performed within it are automatically committed. If the trigger terminates prematurely with an uncaught exception, all DML operations are automatically rolled back. If multiple triggers fire for a single database operation, all trigger code succeeds or fails as a group.
In Chapter 4, you were exposed to DML statements. These statements accept a single record or batch of records. When operating on a batch, they succeed or fail on the entire group of records. For example, if 200 records are inserted and the last ...
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