7 votes
1
An instance of a relational scheme $R(A, B, C)$ has distinct values for attribute $A$. Can you conclude that $A$ is a candidate key for $R?$
3 votes
2
Given below are three implementations of the $\text{swap()}$ function in $\text{C++}$ :$\begin{array}{|l|l|l|} \hline \qquad \qquad \text{(a)} & \qquad \qquad \text{(b)}...