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databases Online Quiz - 159

Description: databases Online Quiz - 159
Number of Questions: 20
Created by:
Tags: databases
Attempted 0/20 Correct 0 Score 0

A Literal is enclosed in double quotes.

  1. True

  2. False


Correct Option: B
  1. Structured Query Language

  2. Standard Query Language

  3. System Query Language

  4. Simple Query Language


Correct Option: A

Limiting the rows in a select statement for a specific condition is done by the clause

  1. Distinct

  2. Projection

  3. Where

  4. All of the above


Correct Option: C

Arithmetic expressions containing a null value evaluate to null.

  1. True

  2. False


Correct Option: B
  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

A Literal is enclosed in double quotes.

  1. True

  2. False


Correct Option: B
  1. Structured Query Language

  2. Standard Query Language

  3. System Query Language

  4. Simple Query Language


Correct Option: A

Duplicate values are eliminated by which keyword

  1. Duplicate

  2. Distinct

  3. Remove

  4. Delete


Correct Option: B
  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
  1. Only one row

  2. Two rows

  3. Zero rows

  4. There is no such subquery


Correct Option: A
  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
  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

The right syntax insert a row into a table is

  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
  1. Date

  2. Sysdate

  3. Current Date

  4. System Date


Correct Option: B
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