Quiz Discussion

Which one of the following is used to define the structure of the relation, deleting relations and relating schemas?

Course Name: SQL -Structured Query Language

  • 1]

    DML(Data Manipulation Langauge)

  • 2]

    DDL(Data Definition Langauge)

  • 3]

    Query

  • 4]

    Relational Schema

Solution
No Solution Present Yet

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# Quiz
1
Discuss
INSERT INTO instructor VALUES (10211, ’Smith’, ’Biology’, 66000);

What type of statement is this?

  • 1]

    Query

  • 2]

    DML

  • 3]

    Relational

  • 4]

    DDL

Solution
2
Discuss
SELECT * FROM employee

What type of statement is this?

  • 1]

    DML

  • 2]

    DDL

  • 3]

    View

  • 4]

    Integrity constraint

Solution
3
Discuss
CREATE TABLE employee (name VARCHAR, id INTEGER)

What type of statement is this?

  • 1]

    DML

  • 2]

    DDL

  • 3]

    View

  • 4]

    Integrity constraint

Solution
4
Discuss

Updates that violate __________ are disallowed.

  • 1]

    Integrity constraints

  • 2]

    Transaction control

  • 3]

    Authorization

  • 4]

    DDL constraints

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

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

  • 1]

    Delete

  • 2]

    Purge

  • 3]

    Remove

  • 4]

    Drop table

Solution
7
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
8
Discuss
DELETE FROM r;   /* r - relation  */

This command performs which of the following action?

  • 1]

    Remove relation

  • 2]

    Clear relation entries

  • 3]

    Delete fields

  • 4]

    Delete rows

Solution
9
Discuss

The database administrator who authorizes all the new users, modifies the database and takes grants privilege is

  • 1]

    Operator of operating system

  • 2]

    Administrator

  • 3]

    Super user

  • 4]

    All of the mentioned

Solution
10
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
# Quiz