create table student(sid int(20),sname char(30),age int(4),gpa int(3));
insert into student values(420,"ganesh",20,4);
insert into student values(421,"dinesh",21,5);
insert into student values(422,"charan",20,6);
select*from student;
update student set gpa=gpa+2,age=age-1 where sid=421;
select*from student;
delete from student where gpa<=4;
select*from student;
drop table student;
select*form student;