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What is delete trigger?
When a trigger is deleted, it is dropped from the current database. The table and the data upon which it is based are not affected. Deleting a table automatically deletes any triggers on the table. A trigger is enabled by default when it is created.
Why trigger has not before Undelete event?
3 Answers. Because, there will be no record available before Undelete to update. But After Undelete you will be having a record to update something with that record. There is a record, it has the field isDeleted set to True.
How do I undelete a trigger in Salesforce?
Unfortunately, once an Apex class or trigger is deleted, it is not possible to recover it. Developers are encouraged to keep up-to-date backups of any Apex code written, as Salesforce is unable to restore Apex code once it has been deleted.
How to create a before delete trigger in SQL Server?
CREATE TABLE CUSTOMERS( ID INT NOT NULL, NAME VARCHAR (20) NOT NULL, AGE INT NOT NULL, ADDRESS CHAR (25) , LAST_UPDATED DATETIME, PRIMARY KEY (ID) ); Create History:
What’s the difference between before delete and after delete?
In other words, if I’m designing a trigger to run when records are deleted, what information should I take into consideration when choosing to attach the trigger to before delete or to after delete? The main difference is that you can’t query the deleted records, or related child records in an after delete trigger.
What’s the difference between before and after triggers in apex?
For Apex triggers, the before and after contexts for insert and update operations makes sense in that the records can be modified during before and not during after. In the case of delete operations, what exactly is different between before delete and after delete?
What is the name of the trigger to create?
The name of the trigger to create. It indicates that the trigger will fire before the DELETE operation is executed. The name of the table that the trigger is created on. You can not create a BEFORE trigger on a view. You can update the :NEW values. You can not update the :OLD values.