Creating Custom Controllers for Visualforce Page | Displaying Data on VF Page - YouTube
Salesforce - Standard Controllers
Using SObjectAccessDecision Class to Call one apex method from another method with two different controller and Passing multiple parameters value from one function to another and displaying cross object related record in
Custom Controller in Salesforce - TutorialKart
▷ Controller Extension In Salesforce | Custom & Standard Controller
Custom Object Controller for VisualForce Page - Salesforce Developer Community