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Topics#ApexSuhas G B 的问题
Suhas G B (IT) 提问于 #Apex
2017年3月3日 09:35

When to use before insert, before update, after insert and after update in Triggers ? I would like to know in which scenario what to use, since I'm getting confused to use them. Please explain it with an example, so there could be clarity on these.

5 个回答
  1. Shiva Rajendran Viji (Trianz)
    2017年3月3日 10:28
    Hi AdminBooster,

    Before vs After 

    Basically before triggers are executed before the data is commited to the database .

    You can change the field value in before trigger and need not commit it, salesforce will automatically commit it

    You can validate the record and make a record not available to save in before trigger

    Fields like Id are not accessible in this trigger.

    After Trigger:

    After trigger works after the data is commited to the database

    Fields like Id are accessible in this trigger.

    If changes are made in this trigger , You should manually commit this to the database

    Insert and Update :

    Insert works when a record is inserted while update works when a record is updated .

    Upsert will call both the update and insert trigger

    Thanks and Regards,

    Shiva RV
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