Quiz Discussion

The language which has recently become the defacto standard for interfacing application programs with relational database system is

Course Name: SQL -Structured Query Language

  • 1]

    Oracle

  • 2]

    SQL

  • 3]

    DBase

  • 4]

    4GL

Solution
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# Quiz
1
Discuss

To delete a particular column in a relation the command used is

  • 1]

    UPDATE

  • 2]

    DROP

  • 3]

    ALTER

  • 4]

    DELETE

Solution
2
Discuss

Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain

  • 1]

    GROUP BY

  • 2]

    WHERE

  • 3]

    ORDER BY

  • 4]

    FROM

Solution
3
Discuss

Which of the following is a legal expression in SQL?

  • 1]
    SELECT NULL FROM EMPLOYEE;

     

  • 2]
    SELECT NAME FROM EMPLOYEE;

     

  • 3]
    SELECT NAME FROM EMPLOYEE WHERE SALARY = NULL;

     

  • 4]
    None of the above

     

Solution
4
Discuss

What is not an advantage of stored procedures?

  • 1]

    Greater security

  • 2]

    SQL can be optimized

  • 3]

    Code sharing

  • 4]

    Increased network traffic

Solution
5
Discuss

A report generator is used to

  • 1]

    update files

  • 2]

    print files on paper

  • 3]

    data entry

  • 4]

    delete files

Solution
6
Discuss

Which one of the following is not true for a view

  • 1]

    View is derived from other tables

  • 2]

    View is a virtual table

  • 3]

    A view definition is permanently stored as part of the database

  • 4]

    View never contains derived columns

Solution
7
Discuss

A reason for using an SQL view to hide columns is

  • 1]

    to simplify a result only

  • 2]

    to prevent the display of sensitive data only

  • 3]

    to accomplish both of the above

  • 4]

    None of the above

Solution
8
Discuss

‘AS’ clause is used in SQL for

  • 1]

    Selection operation

  • 2]

    Rename operation

  • 3]

    Join operation

  • 4]

    Projection operation

Solution
9
Discuss

Which of the following is an advantage of view?

  • 1]

    Data security

  • 2]

    Derived columns

  • 3]

    Hiding of complex queries

  • 4]

    All of the above

Solution
10
Discuss

The SQL ALTER statement can be used to

  • 1]

    Change the table structure

  • 2]

    Change the table data

  • 3]

    Add rows to the table

  • 4]

    Delete rows from the table

Solution
# Quiz