Explanation:This expression is in tuple relational format. 2. A query in the tuple relational calculus is expressed as:
A. {t | P() | t}
B. {P(t) | t }
C. {t | P(t)}
D. All of the mentioned
Answer:A
Explanation:This expression is in tuple relational format. 2. A query in the tuple relational calculus is expressed as:
A. {t | P() | t} B. {P(t) | t } C. {t | P(t)} D. All of the mentioned
Explanation:The tuple relational calculus, is a nonprocedural query language. It describes the desired information without giving a specific procedure for obtaining that information. 3. {t | Э s ε instructor (t[name] = s[name]