Salesforce Apex Trigger Variable Availability to Events
| Trigger.new | Trigger.newMap | Trigger.Old | Trigger.OldMap | |
| Before Insert | Yes | No | No | No |
| Before Update | Yes | Yes | Yes | Yes |
| Before Delete | No | No | Yes | Yes |
| After Insert | Yes | Yes | No | No |
| After Update | Yes | Yes | Yes | Yes |
| After Delete | No | No | Yes | Yes |
| After Undelete | Yes | Yes | No | No |