SQL Begin, Rollback & Commit Transaction

BEGIN TRAN;
select * from tbl1;
DELETE FROM tbl1 where age=32 OR age=79;
select * from tbl1;
ROLLBACK TRAN;
select * from tbl1;

BEGIN TRAN;
select * from tbl1;
DELETE FROM tbl1 where age=32 OR age=79;
select * from tbl1;

COMMIT TRAN;
select * from tbl1;