Learn SALESFORCE-APEX with Real Code Examples

Apex extends point-and-click Salesforce capabilities with programmatic logic.

It supports triggers, async jobs, web services, complex validations, and transaction control.

Runs inside the Salesforce multi-tenant environment with strict governor limits.

Often combined with declarative tools (Flows, Process Builder) to implement robust enterprise logic.

Core to developing scalable, enterprise-grade applications on Salesforce.

DML and SOQL for data access

Triggers to handle record lifecycle events

Apex classes for reusable business logic

Governor limit enforcement for multi-tenant safety

Apex Tests and mock callouts for integration validation

SObject - Salesforce data model entity

Trigger - Automatically executed logic tied to DML events

DML - Data Manipulation Language for insert/update/upsert

SOQL - Salesforce Object Query Language

Governor Limits - Runtime constraints per transaction

force-app/main/default/classes - Apex classes

force-app/main/default/triggers - Trigger files

force-app/main/default/lwc - Lightning Web Components

config/ - Org configuration and scratch org definitions

tests/ - Apex Test Classes

Define schema and metadata

Write Apex classes, triggers, and test classes

Run unit tests and validate governor limits

Deploy using metadata API or Salesforce DX

Monitor execution via logs and debug tools

Beginner: Write a trigger to enforce custom validation

Intermediate: Create a Queueable job for async logic

Advanced: Build REST APIs with custom Apex controllers

Expert: Implement scalable trigger frameworks with dependency injection

Architect: Design multi-org integration with bulkified patterns and async orchestration

Apex vs Flows: Apex for complex logic; Flows for rapid development

Apex vs LWC JS: Apex is server-side; LWC JS is client-side UI logic

Apex vs Java: Apex runs inside Salesforce with strict limits

Apex vs External Microservices: Apex handles CRM logic, microservices handle heavy compute

Apex vs Triggers-only: Apex classes enable better abstraction and scaling

2006 - Apex introduced as on-demand programming

2010 - Expanded async features

2015 - Lightning and LWC era begins

2020 - Stronger APIs and packaging ecosystem

2024 - Major improvements in async patterns and performance

SObject - Data entity

SOQL - Query language

DML - Insert/update/delete

Governor Limits - Resource constraints

LWC - Lightning Web Components