Introduction to SQL MCQ App | Database Systems MCQs e-Book PDF Download | 34
Database Systems MCQs (Computer Science) From Textbook

Database Systems MCQs – Practice Test 34 (Chapter 15)

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The "Introduction to SQL MCQ" App Download (iOS & Android): To insert data into a relation, we specify a tuple to be; MCQ with answers: processed, retrieved, tested, and inserted. Practice Application Security Quiz Questions, download Apple Book (Free Chapter) to manage study schedules.

Introduction to SQL MCQ PDF Download – Practice Test 34

MCQ 166: The correlation name in the SQL standard, is commonly referred to as a:

  1. Table alias
  2. Correlation variable
  3. Tuple variable
  4. All of the above

MCQ 167: To insert data into a relation, we specify a tuple to be:

  1. Retrieved
  2. Processed
  3. Tested
  4. Inserted

MCQ 168: SQL includes a feature for testing whether a subquery has any:

  1. Attributes in results
  2. Tuples in results
  3. Instances in tuples
  4. Relation in result

MCQ 169: SQL allows us to use the comparison operators to compare:

  1. Strings
  2. Arithmetic expressions
  3. Data types
  4. All of the above

MCQ 170: 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

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