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Exam 2023 •
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In the following SQL Query, what * refers to? SELECT * FROM CUSTOMERS
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In the following SQL Query, what * refers to? SELECT * FROM CUSTOMERS
1
Properties that describe the characteristics of entities are called?
2
An entity type is like a ----- in an object oriented language.
3
Two entity types may be associated through more than one relation types?
4
Which of the following is NOT a basic element of all versions of the ER model?
5
An ---------- shows the concepts of specialisation and generalisation.
6
Cardinality is the number of columns in a relation.
7
Which is not a property of relations?
8
A primary key can be user defined or system generated?
9
What the following relational algebra expression do? σsubject = "database"(Books)
10
What are R1, R2, RN in the given statement ∏ R1, R2, Rn (T)
11
In R x S, x represents a -------
12
MIN, MAX, AVG are...
13
A transaction ensures a...
14