Tag: databases

Questions Related to databases

The Data Manipulation Language statements are
technology databases

  1. INSERT

  2. UPDATE

  3. SELECT

  4. All of the above

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Correct Option: D

Declare a number := 5; b number := null; c number := 10; Begin if a > b AND a < c then a := c * a; end if; End; What will be the value of 'a' after execution?
technology databases

  1. 50

  2. NULL

  3. 5

  4. None of the above

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Correct Option: C

Find the ODD Datatype out
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  1. VARCHAR2

  2. RECORD

  3. BOOLEAN

  4. RAW

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Correct Option: B

A Database Procedure is stored in the Database
technology databases

  1. In compiled form

  2. As source code

  3. Both A & B

  4. Not stored

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Correct Option: A

If an UNIQUE KEY constraint on DATE column is created, will it accept the rows that are inserted with SYSDATE?
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  1. will

  2. won't

  3. sometimes possible

  4. None of the above

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Correct Option: B

What is the Result of the following 'AXA'||NULL||'US' ?
technology databases

  1. Error

  2. NULL

  3. AXA US

  4. AXAUS

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Correct Option: D

Use these data for the following Questions EMPNO ENAME SAL A822 RAMASWAMY 3500 A812 NARAYAN 5000 A973 UMESH 2850 A500 BALAJI 5750 Select SAL from EMP E1 where 3 > ( Select count(*) from Emp E2 where E1.SAL > E2.SAL ) will retrieve
technology databases

  1. 3500,5000,2850

  2. 5000,2850

  3. 2850,5750

  4. 5000,5750

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Correct Option: A

What is a trigger?
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  1. A piece of logic written in PL/SQL

  2. Executed at the arrival of a SQL event

  3. Both A & B

  4. None of the above

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Correct Option: C

A Transaction ends
technology databases

  1. Only when it is Committed

  2. Only when it is Rolled back

  3. When it is Committed or Rolled back

  4. None of the above

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Correct Option: C

In "Select 1 from dual;" who is the owner of Dual table?
technology databases

  1. scott

  2. john

  3. sys

  4. system

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Correct Option: C
Explanation:

To solve this question, the user needs to know about the DUAL table in Oracle databases.

The DUAL table is a one-row, one-column table that is automatically created by Oracle. It is owned by the SYS user and is accessible to all users.

Therefore, the correct answer is:

The Answer is: C. sys