Examlex
A candidate key is an attribute, or combination of attributes, that uniquely identifies a row in a relation.
Q8: If an identifier is not assigned, the
Q28: A view may not be updated directly
Q38: You will never need to map data
Q63: Rotating the view of a multidimensional database
Q66: Horizontal partitioning makes sense:<br>A) when different categories
Q68: When determining the size of a fact
Q81: In two-tier database architectures, little functionality needs
Q97: The entity integrity rule states that:<br>A) no
Q102: What are the three different degrees of
Q103: It is better not to have a