Use the following relations R and S to answer the question:
Compute π B, C (R ⋈ S). Which of the following records will be in the result?
What is the effect of SELECT DISTINCT propertyNo FROM Viewing?
Use the following relations R and S to answer the question:
Compute R ⋈R.A<S.C S. [this is theta join]. Which of the following records will be in the result?(Note: R.A means the attribute A of the relation R.)
Use the following relations R and S to answer the question:
Compute R ⋈R.A<S.C S. [this is theta join]. Which of the following records will be in the result?(Note: R.A means the attribute A of the relation R.)
In ORDER BY type_, rent DESC, what role does rent play?
How do you correctly test whether no comment was supplied (i.e. comment_ is missing)?