Learn APEX
Learn Salesforce APEX with real world examples and use cases .
APEX For Developers
About Salesforce Apex
Apex is the programming language of the Salesforce platform. It looks like Java and runs on Salesforce servers, so you can add business logic that clicks alone cannot cover: triggers that react to record changes, classes that process data in bulk, REST services and scheduled jobs.
This page collects our Apex tutorials and ready-to-use scripts. Each post explains the code, shows how to test it, and points out common mistakes.
Where to Start
Triggers
- Trigger: Prevent Account from Deleting if it has Opportunities associated to it.
- Trigger – Create Contact when Account is created
- Trigger: When Opportunity get Closed Send Email to Opportunity Owner
Working with data and the schema
- Fetch all Custom Objects in APEX
- Get all required fields of Salesforce sObject.
- Get all objects available on polymorphic field
- SOQL Result when Multiple Records having the same Name
Test your knowledge
Tips for Learning Apex
- Practise in a free Developer Edition org or a sandbox, never in production.
- Write bulk-safe code from the start: no SOQL queries or DML statements inside loops.
- Write a test class for every trigger and class, and test with many records, not only one.
- Learn the governor limits early. They explain most Apex errors you will see.
- Use a handler class for trigger logic, so the code is easy to read and test.