Learn APEX with Real Code Examples

Apex runs natively on Salesforce servers and is optimized for multitenant architecture.

It supports asynchronous processing, triggers, and declarative automation integration.

Used to build custom business logic, APIs, batch processes, and advanced CRM customizations.

Classes & objects

Triggers for automation

SOQL/SOSL queries

Batch Apex, Queueable Apex, Scheduled Apex

Exception handling & testing framework

Classes, methods, and objects

Triggers and automation events

Governor limits

SOQL/SOSL queries

Asynchronous execution (Batch, Future, Queueable)

classes/

triggers/

testClasses/

objects/ (metadata)

lwc/ or aura/ for UI

Write Apex class or trigger

Run code in Salesforce Developer Console

Deploy using SFDX or Change Sets

Run unit tests

Verify results in org

Beginner: simple triggers & queries

Intermediate: batch jobs, API calls

Advanced: complex workflows & async chaining

Expert: large-scale enterprise architectures

Similar syntax to Java

More restricted due to governor limits

Cloud-executed vs local execution

Deep CRM integration unlike general languages

Strict testing requirements

2006 – Apex launched

2010 – Introduction of Batch Apex & async jobs

2013 – API-first enhancements

2018 – Async Queueable Apex

2020–2025 – Modernization: better testing, limits, & packaging

SOQL: Salesforce Object Query Language

DML: Data Manipulation Language

Governor Limits: Salesforce resource restrictions

Trigger Context Variables: Execution metadata

SObject: Salesforce data object