Tag: databases

Questions Related to databases

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);

technology databases

  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

Show answer
Correct Option: D

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

technology databases

  1. IN

  2. OF

  3. ALL

  4. ANY

Show answer
Correct Option: B

AI Explanation

To answer this question, we need to understand the concept of multiple-row operators.

Multiple-row operators are operators that can be used to compare a single value with multiple values in a subquery result set. These operators include "IN", "ALL", and "ANY".

Let's go through each option to understand why it is correct or incorrect:

Option A) IN - This option is a multiple-row operator. It allows you to check if a value matches any value in a list or a subquery result set.

Option B) OF - This option is not a multiple-row operator. It is not used for comparing a single value with multiple values in a subquery result set. Therefore, this option is correct.

Option C) ALL - This option is a multiple-row operator. It allows you to check if a value matches all the values in a list or a subquery result set.

Option D) ANY - This option is a multiple-row operator. It allows you to check if a value matches any one of the values in a list or a subquery result set.

The correct answer is B) OF. This option is not a multiple-row operator.

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

technology databases

  1. IN

  2. OF

  3. ALL

  4. ANY

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Correct Option: C

A DML statement is executed when you

technology databases

  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

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Correct Option: D

The right syntax insert a row into a table is

technology databases

  1. Insert to table tablename (….);

  2. Insert into table tablename (….);

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

  4. Any one of the above

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Correct Option: C

Which is the function that records the current date?
technology databases

  1. Date

  2. Sysdate

  3. Current Date

  4. System Date

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Correct Option: B

Fastload does not use Transient Journal

technology databases

  1. True

  2. False

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Correct Option: A

Please select the two phases of Fastload

technology databases

  1. Acquisition

  2. Transaction

  3. Application

  4. Clean Up

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Correct Option: A,C

DEFINE command in Fastload stands for

technology databases

  1. Define the target table

  2. Define the Work table

  3. Define the input file

  4. Define the Error table

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Correct Option: C

It is possible to restart Fastload script when the target table is created in the script
technology databases

  1. True

  2. False

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Correct Option: B