Database Systems Exam MCQs – Practice Test 20 (Chapter 15)

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Introduction to SQL MCQs – Practice Test 20 PDF Download

MCQ 96: Language that can define the structure of the data, modify data in the database, and specify security constraints, is:

DB2
JAVA
XML
SQL

MCQ 97: The operation that performs the set difference, is called:

The Intersection Operation
The Intersection all Operation
The Except Operation
The Union Operation

MCQ 98: We can use the not exists construct to simulate the set containment, which is a:

Query operation
Subquery operation
Subset operation
Dataset operation

MCQ 99: The names of the attributes in the result are derived from the names of the attributes in the relations in the:

From clause
Define clause
Select clause
Where clause

MCQ 100: All aggregate functions for their input collection, except count(*) ignore the:

Strings
Null value
0s
1s

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