Custom table silme işlemi delete

1. DELETE FROM dbtab WHERE condition. 
DELETE FROM (dbtabname) WHERE condition. 
2. DELETE dbtab. 
DELETE *dbtab. 
DELETE (dbtabname) ... 
3. DELETE dbtab FROM TABLE itab. 
DELETE (dbtabname) FROM TABLE itab. 
4. DELETE dbtab VERSION vers. 
DELETE *dbtab VERSION vers.