a. Give an example of two tables that are not relations.
b. Suppose that two columns in two different tables have the same column name. What convention is used to give each a unique name?
c. Must all the values in the same column of a relation have the same length?
d. Explain the three different sets of terms used to describe tables, columns, and rows.
e. Explain the difference between functional dependencies that arise from equations and those that do not.