Delete large amount of data in sql server

Question

Suppose that I have a table with 10000000 record. What is difference between this two solution?

1. delete data like :

   DELETE FROM MyTable
            
   
   
           

Answer 1

The first will delete all the data from the table and will have better performance that your second who will delete only data from a specific key.

Now if you have to delete all the data from the table and you don't rely on using rollback think of the use a truncate table