SFDCWallah

Workflow Rule

• Update a field
• Send an email
• Create a Task
•  Send an outbound message (communication with another system)
• Using workflow we can update child to parent fields.
• We can’t perform DML or SOQL with Workflow Rules.

Process builder

• Create a record (not just Tasks!)
• Update related records
• Launch a Quick Action
• Email Alert
• Post to Chatter
• Launch a Flow
• Call Apex code
• Submit for approval
• Invoke another process
• But the process builder doesn’t support outbound messages
• With process builder we can perform both,child to parent and parent to child field update.
• The annotation “@InvocableMethod” defines this method can be invoked from process builder like this:
  global class lookUpAccountAnnotation {
  @InvocableMethod
  public static List<String> getAccountIds(List<String> names) {
  List<Id> accountIds = new List<Id>();
  List<Account> accounts = [SELECT Id FROM Account WHERE Name in :names];
  for (Account account : accounts) {
  accountIds.add(account.Id);
  }
  return accountIds;
  }
  }

If i have missed something or anything i have mentioned is wrong then please tell me in comments.