# Quiz Discussion

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

Course Name: SQL -Structured Query Language

• 1]

Union

• 2]

Intersect

• 3]

Difference

• 4]

Projection

##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

A relational database consists of a collection of

• 1]

Tables

• 2]

Fields

• 3]

Records

• 4]

Keys

##### Solution
2
Discuss

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

• 1]

Union

• 2]

Join

• 3]

Product

• 4]

Intersect

##### Solution
3
Discuss

The term attribute refers to a ___________ of a table.

• 1]

Record

• 2]

Column

• 3]

Tuple

• 4]

Key

##### Solution
4
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
5
Discuss

The term _______ is used to refer to a row.

• 1]

Attribute

• 2]

Tuple

• 3]

Field

• 4]

Instance

##### Solution
6
Discuss

In SQL the spaces at the end of the string are removed by _______ function.

• 1]

Upper

• 2]

String

• 3]

Trim

• 4]

Lower

##### Solution
7
Discuss
SELECT * FROM employee WHERE dept_name="Comp Sci";

In the SQL given above there is an error . Identify the error.

• 1]

Dept_name

• 2]

Employee

• 3]

“Comp Sci”

• 4]

From

##### Solution
8
Discuss

A domain is atomic if elements of the domain are considered to be ____________ units.

• 1]

Different

• 2]

Indivisbile

• 3]

Constant

• 4]

Divisible

##### Solution
9
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
10
Discuss
SELECT instructor.*
FROM instructor, teaches
WHERE instructor.ID= teaches.ID;

This query does which of the following operation?

• 1]

All attributes of instructor and teaches are selected

• 2]

All attributes of instructor are selected on the given condition

• 3]

All attributes of teaches are selected on given condition

• 4]

Only the some attributes from instructed and teaches are selected

# Quiz