Considerations while implementing a Trigger

Considerations while implementing a Trigger

* Upsert trigger fires on 4 different events:- before(insert, update), after (insert, update)

** Merge trigger is fired on both events on delete

*** Field history is updated after the trigger has successfully finished processing data.

**** Any callout should be asynchronous so that trigger does not have to wait for the response.

***** A trigger cannot have a static keyword in its code.

****** If a trigger completes successfully the changes are committed to the database and if it fails                                                                                                         the transaction is rolled back.




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