Question 5 A table T1 in a relational database has the following rows and columns: roll no. marks 1 10 2 20 3 30 4 Null […]

Question 14 For a database relation R(a,b,c,d), where the domains a, b, c, d include only atomic values, only the following functional dependencies and those that […]

Question 15 Let R(a,b,c) and S(d,e,f) be two relations in which d is the foreign key of S that refers to the primary key of R. […]