-Best Tool for working on millions of records it divides record into chunks or batches.
You Can use Batch Apex to Build Complex, Long-running processes that run on Thousands of records on the lightening platform.
–Operate over small batches/ Chunks of records.
–Can be Scheduled
–Implement Database.Batchable interface.
Batch Apex Contains Three Methods:
1.Start : Executes Only Once
Return batch scope or records
Can Return upto 50 million records
2.Execute : Executes for Each batch/ chunks of records
Must have void return type
Each Execution will get new set of governor limits.
3.Finish : Executes Only Once
Called after all batches are processed
Can be Used for post processiong
