What is trigger.new and trigger.old in salesforce

Trigger. new : Returns a list of the new versions of the sObject records. Note that this sObject list is only available in insert and update triggers, and the records can only be modified in before triggers. Trigger. old : Returns a list of the old versions of the sObject records.

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What is the use of old trigger in Salesforce?

Trigger.old returns list of old versions of the sObject records.This list available for update and delete triggers. It represents list records already saved in Salesforce. for insertion operation>> there is no trigger.old as there is no existing records.

What is the difference between update and delete trigger in Salesforce?

for insertion operation>> there is no trigger.old as there is no existing records. In update operation >> it is list of records which are going to change. In Delete operation >> it is list of records which are going to delete. trigger.old Trigger.old returns old value of records and trigger.new returns new value of records.

What is the difference between trigger old and trigger new?

Trigger.new works in case of insert and update both and Trigger.old works in case of update and delete both. For update you can use both as per your need. trigger myTest on Scheme__c (after insert) { for (Scheme__c sc : Trigger.new) { // Trigger.new will return new value of records. } } @Lalit_Rautela:- Good answer with example.

What is the use of new trigger in database?

Trigger.New: Trigger.new returns List of new records which are trying to insert into Database. This is available in Before Insert, Before Update, After Insert, After Update Triggers and undelete Triggers. This list of records can only modified in Before triggers.

Can you explain difference between trigger new and trigger old variables?

New => works for the NEW values that are entering either it may be Insert or Update. Trigger. Old=> works for the OLD values that are already in the Fields, it may be to Delete or Update the records.

What is trigger new and trigger newMap Salesforce?

new is simply a list of the records being processed by the trigger, so if all you need to do is loop through them then you can use that. trigger. newMap just allows you to target specific records by Id should you not need to process everything, or if you need to map other records back to these.

What is trigger new in Salesforce?

Triger. new in Salesforce is a command which returns the list of records that have been added recently to the sObjects. To be more precise, those records will be returned which are yet to be saved to the database.

What is the difference between trigger new and trigger old and trigger newMap and trigger oldMap?

newMap returns a new map of records with id and trigger. oldMap returns an old map of records with id.

What is trigger old and trigger OldMap?

old: Returns a list of the old versions of the sObject records. Note that this sObject list is only available in the update and delete triggers. Trigger. oldMap: A map of IDs to the old versions of the sObject records.

What is new map and old map in Salesforce?

OldMap: A map of IDs to the old versions of the sObject records. Note that this map is only available in update and delete triggers. Trigger. newMap: Trigger. newMap is a map with key as ID of the record and value as the record itself.

Why do we use trigger new?

old for Update operation in triggers. Does trigger. new works on After events such as After Insert,after Update.

What are different types of triggers in Salesforce?

Here is a list of trigger events in salesforce:before insert.before update.before delete.after insert.after update.after delete.after undelete.

How many types of triggers are there in Salesforce?

two typesThere are two types of triggers. Before triggers are used to update or validate record values before they’re saved to the database. After triggers are used to access field values that are set by the system (such as a record’s Id or LastModifiedDate field), and to affect changes in other records.

Can we use old map in after insert?

OLDMAP will not be available as we do not have any old data available. This will be a new record that will get inserted in the database. WITH After Insert, TRIGGER.

Can we use trigger old in before insert?

No, trigger. old is null in insert triggers.

Can a trigger call a batch class?

Yes it is possible, we can call a batch apex from trigger but we should always keep in mind that we should not call batch apex from trigger each time as this will exceeds the governor limit this is because of the reason that we can only have 5 apex jobs queued or executing at a time.

Monday, October 28, 2019

So now we have understood that trigger.new returns new list of records and trigger.old returns old list of records. Let us try to understand the same again by taking an example.

TRIGGER.NEW AND TRIGGER.OLD IN APEX TRIGGER