Quiz Discussion

DELETE FROM r;   /* r - relation  */

This command performs which of the following action?

Course Name: SQL -Structured Query Language

  • 1]

    Remove relation

  • 2]

    Clear relation entries

  • 3]

    Delete fields

  • 4]

    Delete rows

Solution
No Solution Present Yet

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# Quiz
1
Discuss

An attribute A of datatype varchar(20) has the value “Avi”. The attribute B of datatype char(20) has value ”Reed”. Here attribute A has ____ spaces and attribute B has ____ spaces.

  • 1]

    3, 20

  • 2]

    20, 4

  • 3]

    20, 20

  • 4]

    3, 4

Solution
2
Discuss

If we wish to grant a privilege and to allow the recipient to pass the privilege on to other users, we append the __________ clause to the appropriate grant command.

  • 1]

    With grant

  • 2]

    Grant user

  • 3]

    Grant pass privilege

  • 4]

    With grant option

Solution
3
Discuss
SELECT * FROM employee

What type of statement is this?

  • 1]

    DML

  • 2]

    DDL

  • 3]

    View

  • 4]

    Integrity constraint

Solution
4
Discuss

The basic datatype char (n) is a _______ length character string and varchar (n) is _______ length character.

  • 1]

    Fixed, equal

  • 2]

    Equal, variable

  • 3]

    Fixed, variable

  • 4]

    Variable, equal

Solution
5
Discuss

In the authorization graph, if DBA provides authorization to u1 which in turn gives to u2 which of the following is correct?

  • 1]

    If DBA revokes authorization from u1 then u2 authorization is also revoked

  • 2]

    If u1 revokes authorization from u2 then u2 authorization is revoked

  • 3]

    If DBA & u1 revokes authorization from u1 then u2 authorization is also revoked

  • 4]

    If u2 revokes authorization then u1 authorization is revoked

Solution
6
Discuss

Which of the following is used to provide delete authorization to instructor?

  • 1]
    CREATE ROLE instructor ;
    GRANT DELETE TO instructor;

     

  • 2]
    CREATE ROLE instructor;
    GRANT SELECT ON takes
    TO instructor;

     

  • 3]
    CREATE ROLE instructor;
    GRANT DELETE ON takes
    TO instructor;

     

  • 4]

    All of the mentioned

Solution
7
Discuss

To remove a relation from an SQL database, we use the ______ command.

  • 1]

    Delete

  • 2]

    Purge

  • 3]

    Remove

  • 4]

    Drop table

Solution
8
Discuss

Which of the following is used to provide privilege to only a particular attribute?

  • 1]

    Grant update(budget,salary,Rate) on department to Raj

  • 2]

    Grant update(budget) on department to Raj

  • 3]

    Grant select on employee to Amit

  • 4]

    Grant delete to Amit

Solution
9
Discuss

Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database?

  • 1]

    DML(Data Manipulation Langauge)

  • 2]

    DDL(Data Definition Langauge)

  • 3]

    Query

  • 4]

    Relational Schema

Solution
10
Discuss
CREATE TABLE employee (name VARCHAR, id INTEGER)

What type of statement is this?

  • 1]

    DML

  • 2]

    DDL

  • 3]

    View

  • 4]

    Integrity constraint

Solution
# Quiz