Computer Science Degree Courses

Database Systems Certification Exam Tests

Database Systems Practice Test 252

Books:

Apps:

The Aggregate Functions MCQ with Answers PDF (Aggregate Functions Multiple Choice Questions (MCQs) PDF e-Book) download Ch. 15-252 to prepare Database Systems Practice Tests. Learn Introduction to SQL Test PDF, Aggregate Functions Multiple Choice Questions (MCQ Quiz) for online software development courses. The Aggregate Functions MCQ App Download: Free certification app for functional dependency theory, online analytical processing (olap), relational databases, database views, aggregate functions test prep to learn distance learning courses.

The MCQ Quiz: The output of the query:
select avg (salary)
from instructor
where dept name='Comp. Sci.';
"Aggregate Functions" App (Play Store & App Store) with answers: Salary of instructors in the Computer Science department.; Average salary of instructors in the Computer Science department.; Average salary in the Computer Science department.; Maximum salary of instructors in the computer science department; for online software development courses. Practice Introduction to SQL Questions and Answers, Apple Book to download free sample for accelerated computer science degree online.

## Aggregate Functions MCQ Quiz with Answers : Test 252

MCQ 1256:

The output of the query:
select avg (salary)
from instructor
where dept name='Comp. Sci.';

1. Average salary of instructors in the Computer Science department.
2. Salary of instructors in the Computer Science department.
3. Average salary in the Computer Science department.
4. Maximum salary of instructors in the computer science department
MCQ 1257:

A modification to the database expressed in terms of a view must be translated to a

1. Physical model of database
2. Logical model of database
3. View model of database
4. Virtual model of database
MCQ 1258:

SQL provides a rich DDL that allows one to define

1. Tables
2. Integrity Constraints
3. Assertions
4. All of the Above
MCQ 1259:

Multiples of rollup and cube operations can be used in a single

1. having by clause
2. Group by clause
3. select clause
4. define clause
MCQ 1260:

To find logically implied functional dependencies, the types of rules to be followed are of type

1. 2 types
2. 3 types
3. 4 types
4. 5 types