a. Select R.value, S. Value from R inner join S on R.ID = S.ID;
b. Select R.value, S. Value from R left outer join S on R.ID = S.ID;
c. Select R.value, S. Value from R right outer join S on R.ID = S.ID;
d. select R.value, S. Value from R full outer join S on R.ID = S.ID;
Fig: 1