What is multivalued attribute?

Multivalued Attribute: Phone number, student entity is considered to have more than one contact number. For multivalued attribute a separate table (STUDENTS_phone) is created to store the phone details of students specifying a foreign key of the student table.

What is the multivalued attribute of phone in Table 1?

For answering this question, consider the STUDENT relation given in Table 1 with Phone as multivalued attribute. In Phone attribute, some records have more than one phone numbers and some without phone numbers. The phone numbers are separated by comma for the records with more than one phone numbers.

How to represent the multivalued attribute in contacts relation scheme?

As you should expect by now, we can’t represent the multivalued attribute directly in the Contacts relation scheme. Instead, we will model it using its own relation scheme. Thus, we remove the old hobbies attribute and create a new scheme, very similar to the one that we created for phone numbers in the repeated attribute design pattern.

How to create a multi-valued attribute in a relational database?

There is generally no such thing as multi-valued attribute in relational databases. Possible solutions for your problem: Create a separate table for storing phone numbers which references your company table by primary key and contains undefinite number of rows per company.

Multivalued Attribute Phone Number - Contact Information Finder

Listing Results Multivalued Attribute Phone Number

AD user script to populate the IPPHONE attribute with the

(800) 123 456

Our objective is to search AD for specific users (say filtering them out with a username that starts with a "T") and User account is "Enabled" then grab the last four digits of their phone number (phone number is set up as follows: (800) 123 456 ) then populate the IPPHONE attribute with the last four digits of their phone number.

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See Also:User Phone Number, User Defined Phone Number, Verify It Show details

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Contact List Found
1. (800) 123 456

Frequently Asked Questions
What is multivalued attribute?
Multivalued Attribute: Phone number, student entity is considered to have more than one contact number. For multivalued attribute a separate table (STUDENTS_phone) is created to store the phone details of students specifying a foreign key of the student table.
What is the multivalued attribute of phone in Table 1?
For answering this question, consider the STUDENT relation given in Table 1 with Phone as multivalued attribute. In Phone attribute, some records have more than one phone numbers and some without phone numbers. The phone numbers are separated by comma for the records with more than one phone numbers.
How to represent the multivalued attribute in contacts relation scheme?
As you should expect by now, we can’t represent the multivalued attribute directly in the Contacts relation scheme. Instead, we will model it using its own relation scheme. Thus, we remove the old hobbies attribute and create a new scheme, very similar to the one that we created for phone numbers in the repeated attribute design pattern.
How to create a multi-valued attribute in a relational database?
There is generally no such thing as multi-valued attribute in relational databases. Possible solutions for your problem: Create a separate table for storing phone numbers which references your company table by primary key and contains undefinite number of rows per company.

Multivalued Attribute Phone Number