Quiz Discussion

Database __________ which is the logical design of the database, and the database _______ which is a snapshot of the data in the database at a given instant in time.

Course Name: SQL -Structured Query Language

  • 1]

    Instance, Schema

  • 2]

    Relation, Schema

  • 3]

    Relation, Domain

  • 4]

    Schema, Instance

Solution
No Solution Present Yet

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# Quiz
1
Discuss

The_____ operation allows the combining of two relations by merging pairs of tuples, one from each relation, into a single tuple.

  • 1]

    Select

  • 2]

    Join

  • 3]

    Union

  • 4]

    Intersection

Solution
2
Discuss

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

  • 1]

    Query

  • 2]

    Relational

  • 3]

    Structural

  • 4]

    Compiler

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

_____ operator is used for appending two strings.

  • 1]

    &

  • 2]

    %

  • 3]

    ||

  • 4]

    _

Solution
5
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
6
Discuss

The ________ clause is used to list the attributes desired in the result of a query.

  • 1]

    Where

  • 2]

    Select

  • 3]

    From

  • 4]

    Distinct

Solution
7
Discuss

A relational database consists of a collection of

  • 1]

    Tables

  • 2]

    Fields

  • 3]

    Records

  • 4]

    Keys

Solution
8
Discuss

The _______ operator takes the results of two queries and returns only rows that appear in both result sets.

  • 1]

    Union

  • 2]

    Intersect

  • 3]

    Difference

  • 4]

    Projection

Solution
9
Discuss

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

  • 1]

    Union

  • 2]

    Join

  • 3]

    Product

  • 4]

    Intersect

Solution
10
Discuss
SELECT *
FROM instructor
ORDER BY salary ____, name ___;

To display the salary from greater to smaller and name in ascending order which of the following options should be used?

  • 1]

    Ascending, Descending

  • 2]

    Asc, Desc

  • 3]

    Desc, Asc

  • 4]

    Descending, Ascending

Solution
# Quiz