Which term describes an attribute or combination of attributes that uniquely identifies a row in a relation?
Which area of database security involves maintaining access to enterprise data?
What improvement can be made to file-based databases to overcome their limitations?
Consider the following relational algebraic expression: Which of the following SQL statements is equivalent to this relational algebraic expression?
Consider the Registration relation shown in the exhibit. Which of the following SQL statements would return all tuples that have course codes beginning with the letter M?