Quiz Discussion

Using which language can a user request information from a database?

Course Name: SQL -Structured Query Language

  • 1]

    Query

  • 2]

    Relational

  • 3]

    Structural

  • 4]

    Compiler

Solution
No Solution Present Yet

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# Quiz
1
Discuss

The ______ clause allows us to select only those rows in the result relation of the ____ clause that satisfy a specified predicate.

  • 1]

    Where, from

  • 2]

    From, select

  • 3]

    Select, from

  • 4]

    From, where

Solution
2
Discuss

A relational database consists of a collection of

  • 1]

    Tables

  • 2]

    Fields

  • 3]

    Records

  • 4]

    Keys

Solution
3
Discuss

For each attribute of a relation, there is a set of permitted values, called the ________ of that attribute.

  • 1]

    Domain

  • 2]

    Relation

  • 3]

    Set

  • 4]

    Schema

Solution
4
Discuss

Student(ID, name, dept name, tot_cred)
In this query which attributes form the primary key?

  • 1]

    Name

  • 2]

    Dept

  • 3]

    Tot_cred

  • 4]

    ID

Solution
5
Discuss

The most commonly used operation in relational algebra for projecting a set of tuple from a relation is

  • 1]

    Join

  • 2]

    Projection

  • 3]

    Select

  • 4]

    Union

Solution
6
Discuss
SELECT emp_name
FROM department
WHERE dept_name LIKE ’ _____ Computer Science’;

Which one of the following has to be added into the blank to select the dept_name which has Computer Science as its ending string?

  • 1]

    %

  • 2]

    _

  • 3]

    ||

  • 4]

    $

Solution
7
Discuss

The _________ provides a set of operations that take one or more relations as input and return a relation as an output.

  • 1]

    Schematic representation

  • 2]

    Relational algebra

  • 3]

    Scheme diagram

  • 4]

    Relation flow

Solution
8
Discuss

_____ operator is used for appending two strings.

  • 1]

    &

  • 2]

    %

  • 3]

    ||

  • 4]

    _

Solution
9
Discuss
SELECT name ____ instructor name, course id
FROM instructor, teaches
WHERE instructor.ID= teaches.ID;

Which keyword must be used here to rename the field name?

  • 1]

    From

  • 2]

    Rename

  • 3]

    As

  • 4]

    Join

Solution
10
Discuss

The _______operation performs a set union of two “similarly structured” tables

  • 1]

    Union

  • 2]

    Join

  • 3]

    Product

  • 4]

    Intersect

Solution
# Quiz