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When to use after delete?
This event runs the block of code after the data is deleted from the database. Operations such deleting related records can be handled using this event.
What is the difference between delete and trigger?
Deleting a table automatically deletes any triggers on the table. A trigger is enabled by default when it is created. Disabling a trigger does not drop it. The trigger still exists as an object in the current database.
Can we use trigger new in before Delete?
To execute trigger on a case like before insert, after insert, before update, after update, before delete, after delete, after undelete, we must specify trigger events in a comma separated list as shown above….Different Triggers in Salesforce.
| Trigger Event | Trigger.New | Trigger.Old |
|---|---|---|
| After Delete | No | Yes |
What is after DELETE trigger?
An AFTER DELETE Trigger means that MySQL will fire this trigger after the DELETE operation is executed.
Can DELETE be rolled back?
DROP and TRUNCATE are DDL commands, whereas DELETE is a DML command. DELETE operations can be rolled back (undone), while DROP and TRUNCATE operations cannot be rolled back.
What’s the difference between before and after delete in apex?
The main difference is that you can’t query the deleted records, or related child records in an after delete trigger. Child records will either be deleted, or have their lookup fields set to null, depending on the field’s settings.
What’s the difference between a truncate and a delete?
The DELETE statement is used when we want to remove some or all of the records from the table, while the TRUNCATE statement will delete entire rows from a table. DELETE is a DML command as it only modifies the table data, whereas the TRUNCATE is a DDL command. DELETE command can filter the record/tuples by using the WHERE clause.
What’s the difference between for and after in DML?
AFTER specifies that the DML trigger is fired only when all operations specified in the triggering SQL statement have executed successfully. All referential cascade actions and constraint checks also must succeed before this trigger fires. AFTER is the default when FOR is the only keyword specified. AFTER triggers cannot be defined on views.