SQL Database Interview Questions and Answers PDF Download

Learn sql database interview questions and answers, sql FAQs for online MCQs based test prep. These frequently asked questions has multiple choice questions (MCQ), sql quiz questions and answers as attributes in group by clause having tuples with same value are placed in, answer key with choices as one group , two groups, multiple groups and no groups for competitive exam preparation. Free frequently asked questions are to learn sql database interview questions and answers quiz online with MCQs to practice test questions with answers.

FAQs SQL Database Interview Questions and Answers PDF Download

MCQ. Attributes in group by clause having tuples with same value are placed in

  1. One group
  2. Two groups
  3. Multiple groups
  4. No groups

A

MCQ. Aggregate functions can be applied over a group of sets of tuples instead of just single tuple by using clause

  1. By Grouped clause
  2. Group by clause
  3. Merge clause
  4. Sync clause

B

MCQ. Aggregate function count of an empty collection is said to be

  1. Always unity
  2. 0
  3. Infinite
  4. Unknown

B

MCQ. Built-in aggregate functions defined by SQL, ignore null values for their input collection, except

  1. Sum
  2. Avg
  3. Min/max
  4. Count(*)

D

MCQ. Attributes specified in group by clause of SQL statement, are used to form

  1. A single value
  2. Multiple values
  3. Groups
  4. Multiple relations

C