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databases Online Quiz - 154

Description: databases Online Quiz - 154
Number of Questions: 20
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Tags: databases
Attempted 0/20 Correct 0 Score 0

What are SQL “SELECT” statement capabilities.

  1. Projection

  2. Selection

  3. Join

  4. All of the above


Correct Option: D
  1. Select all columns from EMP;

  2. Select distinct columns from EMP;

  3. Select * from EMP;

  4. All of the above


Correct Option: C
  1. Structured Query Language

  2. Standard Query Language

  3. System Query Language

  4. Simple Query Language


Correct Option: A
  1. Duplicate

  2. Distinct

  3. Remove

  4. Delete


Correct Option: B

The two types of subqueries are:

  1. Single-row subquery, Double-row subquery

  2. Double-row subquery, Multiple-row subquery

  3. Multiple-row subquery

  4. Single-row subquery and Multiple subquery


Correct Option: D

Single-row subquery returns:

  1. Only one row

  2. Two rows

  3. Zero rows

  4. There is no such subquery


Correct Option: A

What is the result of the query below? SELECT Stud_name, Rollnum FROM STUDENT WHERE stud_marks=(SELECT MIN (stud_marks) FROM STUDENT GROUPBY Rollnum);

  1. It gives the name and marks of all the students.

  2. It does not return anything.

  3. It shows an error saying” INVALID SYNTAX ERROR”

  4. It shows an error saying” Single-row subquery returns more than one row


Correct Option: D

Which of the following is not a multiple-row operator?

  1. IN

  2. OF

  3. ALL

  4. ANY


Correct Option: B

Which operator compares a value to every value returned by a subquery?

  1. IN

  2. OF

  3. ALL

  4. ANY


Correct Option: C

A DML statement is executed when you

  1. Add new rows to a table

  2. Modify existing rows of a table

  3. Remove existing rows from a table

  4. All of the above


Correct Option: D
  1. Insert to table tablename (….);

  2. Insert into table tablename (….);

  3. Insert into table tablename values (…..);

  4. Any one of the above


Correct Option: C

Which is the function that records the current date?

  1. Date

  2. Sysdate

  3. Current Date

  4. System Date


Correct Option: B
  1. Acquisition

  2. Transaction

  3. Application

  4. Clean Up


Correct Option: A,C
  1. Define the target table

  2. Define the Work table

  3. Define the input file

  4. Define the Error table


Correct Option: C
  1. Acquisition

  2. Transaction

  3. Application

  4. Preliminary


Correct Option: D
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