create table asd;

create table tb (col1 INT, col2 string, col3 FLOAT);

create table tb1 (
    col1 int primary key, 
    col2 FLOAT
);

create table tb2 (
    x int,
    y int,
    z int
);

SELECT Student.Sname
FROM Student
WHERE Sno IN (
    SELECT Sno
    FROM SC 
    WHERE SC.Cno='81003'
);

select Student.Sname from Student join SC on Student.Sno=SC.Sno where SC.Cno='81003';

select Student.Sname from Student join SC on Student.Sno=SC.Sno and SC.Cno='81003';

insert into tb1 values (1, 'foo');

insert into tb1 values (2, 'foo');

update tb1 set col1=3 where col1=2;

select * from tb1 where c1 > 1 and c2 = 'foo';

delete from tb1 where c1 = 1;