List of top Database Management Systems Questions

A tuple within a relation must be ______.

Which two constraints when applied together will produce a primary key constraint?

Which two constraints when applied together will produce a primary key constraint ?
(A) NOT NULL
(B) UNIQUE
(C) DEFAULT
(D) ZERO
Choose the correct answer from the options given below:

Which statement is used to add a constraint in existing attribute of a relation?

The Lucas sequence L_n is defined by the recurrence relation: L_n = L_n−1 + L_n−2, for n ≥ 3, with L₁ = 1 and L₂ = 3. Which one of the options given is TRUE?