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What are Salesforce Apex triggers?

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What are Salesforce Apex triggers?

Apex triggers enable you to perform custom actions before or after changes to Salesforce records, such as insertions, updates, or deletions. A trigger is Apex code that executes before or after the following types of operations: insert. update. delete.

How do you write a trigger in Apex?

Create a Trigger

  1. In the Developer Console, click File | New | Apex Trigger. The New Apex Trigger window opens.
  2. For Name, type CreateContact .
  3. For sObject, select Candidate__c.
  4. Click Submit.
  5. Replace the existing code with this code:
  6. Save the trigger.

What is trigger in Salesforce with example?

A trigger is an Apex script that executes before or after data manipulation language (DML) events occur. Apex triggers enable you to perform custom actions before or after events to record in Salesforce, such as insertions, updates, or deletions.

How do I create an Apex trigger in Salesforce?

Create an Apex Trigger

  1. From Setup, select Customize and then click the object that you want to add the trigger to.
  2. Click Triggers and then click New.
  3. To define your trigger, enter Apex code similar to this sample code.
  4. Make sure that Is Active is selected.
  5. Click Save.

What are the two options for when Apex triggers can run?

What are the two options for when Apex Triggers can run? Apex Triggers can either run before a record has been saved of after. A “before” operation is usually used to verify information that is going to be inserted, and an “after” trigger is used to access data that has previously been entered by a user or system.

How do you call a trigger in Salesforce?

Apex Trigger in SalesForce

  1. Login your Salesforce Account and Click the Developer Console.
  2. The General Syntax for Apex Trigger is, trigger TriggerName on ObjectName (trigger_events) {
  3. For Debugging the Apex Trigger HelloTrigger, Click Debug menu and Select Open Execute Anonymous Window,
  4. Now we can verify the output.

What is trigger example?

Trigger: A trigger is a stored procedure in database which automatically invokes whenever a special event in the database occurs. For example, a trigger can be invoked when a row is inserted into a specified table or when certain table columns are being updated.

How do I trigger in Salesforce?

Get Started with Apex Triggers

  1. Write a trigger for a Salesforce object.
  2. Use trigger context variables.
  3. Call a class method from a trigger.
  4. Use the sObject addError() method in a trigger to restrict save operations.

What is Governor limits in Salesforce interview questions?

Answer: The Governor Limits in Salesforce helps the user for controlling the amount of data or the number of records the user can store within the shared databases. The Salesforce makes use of a single database to store data from a number of clients.

How do you run a trigger?

Running a Trigger

  1. In the Databases folder in Enterprise Explorer, under the database connection profile, expand the navigation tree for the appropriate database and schema owner.
  2. Expand the Tables folder, the table where the trigger is located, and then the Triggers folder.
  3. Right-click the trigger and select Run.

What are some Salesforce apex best practices?

Top 3 Salesforce APEX Best Practices Process similar task in Batch: It is the best practice when working with a bulk of data records to handle and process similar sets of record together at the Avoid SOQL Queries or DML Statements inside ‘FOR Loops’ : In the above example, we’ve seen how ‘For’ loop handles multiple records in bulk. Avoid Hardcode IDs:

What are trigger events in Salesforce?

Triggers in Salesforce are programmatic event handlers which is an Apex code that gets executed when a record is saved. Trigger is an object where for each trigger we have written, Salesforce will create a record in ApexTrigger object. Apex Trigger is also a class which contains twelve static context variables.

What is apex trigger?

Apex Trigger is an action which gets fired on particular event. In salesforce trigger is apex code that executes before or after the below types of operations.

What is apex in Salesforce?

APEX in Salesforce. Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on the Force.com platform server in conjunction with calls to the Force.com API.