Difference between drop, truncate and delete statement in Oracle SQL

Drop:
Structure + Data is gone
Can flashback
Cant rollback
DDL statement

Truncate:
Only data is gone. Structure remains.
Cant rollback
Cant flashback
Faster command
Memory is released
DDL statement

Delete:
Only data is gone. Structure remains.
Can rollback
Cant flashback
Memory is not released
Slower command
Can use where clause
DML statement