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databases Online Quiz - 151

Description: databases Online Quiz - 151
Number of Questions: 20
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Tags: databases
Attempted 0/20 Correct 0 Score 0
  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

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

  1. IN

  2. OF

  3. ALL

  4. ANY


Correct Option: C
  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

Concatenation operator is

  1. +

  2. -

  3. ||

  4. *


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
  1. Date

  2. Sysdate

  3. Current Date

  4. System Date


Correct Option: B

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

Select ename from emp where ename =”Scott”; This select statement executes successfully.

  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

Which is the command line tool to execute SQL Server Integration Services packages?

  1. DTEXEC

  2. DTSEXEC

  3. SQLEXEC

  4. PSEXEC


Correct Option: A
  1. distributes a row to single output and another to the other output

  2. distributes its input to one or more outputs

  3. join two inputs

  4. extract data from a connection


Correct Option: B

Which of the following is not a Control Flow Element?

  1. Containers

  2. Tasks

  3. Transformations

  4. Precedence Constraints


Correct Option: C
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