Which three pieces of information did E.F. Codd describe as necessary to retrieve a data value from a relational database?
What is a virtual table?
Your enterprise has reached the conceptual design phase for a database project. What is the desired goal at the end of this design phase?
In which phase of database design do you identify entities, attribute domains, and relationships?
Consider the Dept1_Parts and Dept2_Parts relations shown in the exhibit. Which of the following SQL statements would create a set difference of the two relations with the widest variety of Structured Query Language dialects?
With regard to databases, what is normalization?
