single valued vs multivalued attribute

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GeeksForGeeks
https://www.geeksforgeeks.org/types-of-attributes-in-er-model
Types of Attributes in ER Model - GeeksforGeeks
There are different types of attributes as discussed below- 1. Simple Attribute 2. Composite Attribute 3. Single-Valued Attribute 4. Multi-Valued Attribute 5. Derived Attribute 6. Complex Attribute 7. Stored … See more
Simple Attribute
An attribute that cannot be further subdivided into components is a simple attribute. Example:The roll number of a student, the ID number of an employee, gender, an… See more
GeeksForGeeks
Composite Attribute
An attribute that can be split into components is a composite attribute. Example:The address can be further split into house number, street number, city, state, count… See more
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Single-Valued Attribute
The attribute which takes up only a single value for each entity instance is a single-valued attribute. Example:The age of a student, Aadhar card number. See more
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Multi-Valued Attribute
The attribute which takes up more than a single value for each entityinstance is a multi-valued attribute. And it is represented by double oval shape. Example: Phone number of … See more
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Which attribute takes up only a single value?
The attribute which takes up only a single value for each entity instance is a single-valued attribute. Example: The age of a student, Aadhar card number. 4. Multi-Valued Attribute The attribute which takes up more than a single value for each entity instance is a multi-valued attribute. And it is represented by double oval shape.
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Simple Attribute
Composite Attribute
Single-Valued Attribute
Multi-Valued Attribute
Which attribute takes up only a single value?

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Comparison of Single-Valued and Multi-Valued Attributes
Attribute Type Description Example Sources
Single-Valued One value per entity Nationality ¹ ³ ⁵
Multi-Valued Multiple values per entity Phone numbers ² ⁴ ⁶

Single-valued attributes are simpler and easier to manage, suitable for straightforward data structures. Multi-valued attributes, while useful for complex data, can complicate database design and querying, often requiring normalization to maintain data integrity ² ⁴ ⁷.
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Single-valued and multi-valued attributes
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7.3.3: Single-Valued Attributes – Relational …
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Problem with multi-valued Attributes - Rel…
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Different Types Of Attributes in DBMS - …
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Single-valued and multi-valued attributes
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What is a single-valued attribute?
4. Single-valued attribute You can only store one value for each entity. Date of birth is a good example for us. A player can only have a single date of birth. Single-valued attributes can be either simple or composite.
Composite and other attributes in the entity-relationship model
gleek.io
Can a multi-valued attribute have more than one value?
For every instance of an entity, each attribute in its group can have only one value. Attributes with more than one value are considered multi-valued, and they must be resolved. Question: What are the disadvantages of using a multi-valued attribute in an entity relationship model?
Problem with multi-valued Attributes - RelationalDBDesign
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Which attribute takes up only a single value?
The attribute which takes up only a single value for each entity instance is a single-valued attribute. Example: The age of a student, Aadhar card number. 4. Multi-Valued Attribute The attribute which takes up more than a single value for each entity instance is a multi-valued attribute. And it is represented by double oval shape.
Types of Attributes in ER Model - GeeksforGeeks
geeksforgeeks.org
What is the difference between derived and multi-valued attributes?
Derived attributes are calculated from other attributes, multi-valued ones can hold multiple values, and key attributes uniquely identify each entity. These attributes help organize and understand data in a database model. Why attributes are used?
Types of Attributes in ER Model - GeeksforGeeks
geeksforgeeks.org
What is the difference between a kernel and a multivalued attribute?
kernel: see independent entity key: an attribute or group of attributes whose values can be used to uniquely identify an individual entity in an entity set multivalued attributes: attributes that have a set of values for each entity n-ary: multiple tables in a relationship
1.8: Chapter 8 The Entity Relationship Data Model
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What are multi-valued attributes?
Multi-valued attributes can create redundancy and complicate the structure of the database, making it difficult to enforce rules about data consistency. To maintain integrity and clarity, it may be advisable to transform multi-valued attributes into separate entities, which helps avoid potential issues during data retrieval and updates.
Multi-valued attribute - (Intro to Database Systems) - Vocab ... - Fiveable
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GeeksForGeeks
https://www.geeksforgeeks.org/multivalued-attributes-in-dbms
Multivalued Attributes in DBMS - GeeksforGeeks
Jun 11, 2024 · In contrast to its single-valued counterpart, a multivalued attribute allows more than one value to be stored for a single entity instance. In simpler words, it permits an entity to have …
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Single-Valued Attribute
Multivalued Attributes
Multivalued function
Scaler
https://www.scaler.com/topics/types-of …
Different Types Of Attributes in DBMS - Scaler
Apr 13, 2024 · Multi-Valued Attributes. Multi-valued attributes have opposite functionality to that of single-valued attributes, and as the name suggests, multi-valued attributes can take up and store more than one value at a time for an …
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The Entity
Name of Attributes
Database Management Systems
Engineering LibreTexts
https://eng.libretexts.org/Bookshelves/Computer...
1.8: Chapter 8 The Entity Relationship Data Model
Multivalued attributes are attributes that have a set of values for each entity. An example of a multivalued attribute from the COMPANY database, as seen in Figure 8.4, are the degrees of …
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The Entity
Multivalued Attributes
Entity Relationship Model
GeeksForGeeks
https://www.geeksforgeeks.org/attributes-in-dbms
Attributes in DBMS - GeeksforGeeks
Apr 4, 2024 · Single Valued Attribute. Multivalued Attribute. Key Attribute. Derived Attribute. Stored Attribute. Complex Attribute. Let's look at all attributes one by one. Simple Attribute. …
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Multivalued Attributes
Derived Attribute
Cheriton School of Computer Science
https://cs.uwaterloo.ca/~tozsu/courses/CS338/lectures/10 ER Model.pdf
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THE ENTITY- RELATIONSHIP (ER) MODEL - University of …
Attributes of 1:1 or 1:N relationship types can be migrated to one of the participating entity types. For a 1:N relationship type, relationship attribute can be migrated only to entity type on N-side …
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The Entity
Entity Relationship Model
Type of Attribute
ER Model
Gleek
https://www.gleek.io/blog/er-model-attributes.html
Composite and other attributes in the entity-relationship model
Jun 9, 2020 · Single-valued attributes can be either simple or composite. 5. Multi-valued attribute. You can store more than one value for each entity. In our example, we want to make sure that …
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Single-Valued Attribute
Composite Attribute
Entity–relationship model
Engineering LibreTexts
https://eng.libretexts.org/Courses/Delta_College...
8.2: Attributes - Engineering LibreTexts
Dec 29, 2022 · Simple attributes are those drawn from the atomic value domains; they are also called single-valued attributes. In the COMPANY database, an example of this would be: …
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Name of Attributes
Engineering LibreTexts
Delta College
mu.edu
https://www.cs.mu.edu/~praveen/Teaching/Db/Lectures/ch7.pdf
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Chapter 7: Entity Relationship Model Database Design …
Single-valued vs Multi-valued (e.g. Locations for DEPARTMENT) Stored vs Derived (e.g. NumberOfEmployees for DEPARTMENT) Figure 3.5: example of a complex attribute with multi …
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Single-Valued Attribute
Entity Relationship Model
Composite Attribute
RelationalDBDesign
https://www.relationaldbdesign.com/database-design/...
Problem with multi-valued Attributes - RelationalDBDesign
In an Entity Relationship Model (ERM), a multi-valued attribute is an attribute that can have multiple values for a single entity instance. While multi-valued attributes can be useful in …
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Entity Relationship Model
Attribute
Department of Computer Science at Dartmouth College
https://www.cs.dartmouth.edu/~cs61/Lectures/04 - ER...
ER Modeling - Department of Computer Science
Feb 23, 2023 · Single-valued attribute: Attribute that has only a single value at a time Most attributes are this way Multivalued attributes: Attributes that have many values
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Single-Valued Attribute
Multivalued Attributes
gsu.edu
http://tinman.cs.gsu.edu/~raj/4340/sp12/er.html
ER Model - Attributes
To distinguish a multi-valued attribute from a single-valued one, it is customary to enclose the former within curly braces (which makes sense, as such an attribute has a value that is a set, …
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Single-Valued Attribute
Attribute in Er Model
Er Derived Attribute
Fiveable
https://library.fiveable.me/.../multi-valued-attribute
Multi-valued attribute - (Intro to Database Systems) - Vocab
This distinction helps to visually communicate the difference in data complexity; multi-valued attributes indicate that an entity can be linked to several values for that specific attribute, …
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Single-Valued Attribute
The Entity
Medium
https://medium.com/@alaetaouab/database-design...
Database Design Series: Attribute Types in ER model with
Mar 24, 2022 · Multivalued attribute: as its name implies, may take on more than one value for a given occurrence of an entity. For example, the attribute “profession” can be multivalued if a …
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The Entity
Database design
Entity–relationship model
Attribute in Er Model
IBM
https://www.ibm.com/docs/en/zos/2.4.0?topic=...
Single-valued and multi-valued attributes
Single-valued attributes accept only one value. For single-valued attributes, the syntax is: attribute = value attribute = "value with spaces". Multi-valued attributes. Multi-valued attributes accept …
Open Library Publishing Platform
https://ecampusontario.pressbooks.pub/relational...
7.3.4: Multi-Valued Attributes – Relational Databases and …
Multi-valued attributes are illustrated in an ERD with a double-lined oval. We can use multi-valued attributes to (at least) document a requirement, and at a later time, refine the model replacing …
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Relational Databases
Microsoft Access
Engineering LibreTexts
https://eng.libretexts.org/Bookshelves/Computer...
7.3: Attributes - Engineering LibreTexts
Single-Valued Attributes. We characterize an attribute as being single-valued if there is only one value at a given time for the attribute. Consider the Employee entity type for a typical business …
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Single-Valued Attribute
The Entity
Name of Attributes
Type of Attribute
Fiveable
https://library.fiveable.me/.../multivalued-attribute
Multivalued Attribute - (Intro to Database Systems) - Fiveable
A multivalued attribute is an attribute that can hold multiple values for a single entity in a database. This type of attribute allows for more complex data structures, reflecting real-world …
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Type of Attribute
Database
YouTube
https://www.youtube.com/watch?v=tt5fJXYiEp0
Single Valued Attributes vs Multivalued Attributes | Database
This lecture describes the concepts of Single-valued and Multivalued Attributes.
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Single-Valued Attribute
Multivalued Attributes
Example For Multi Valued Attribute
BeginnersBook
https://beginnersbook.com/2015/04/e-r-model-in-dbms
Entity Relationship Diagram – ER Diagram in DBMS
Jul 25, 2022 · Double Ellipses: Multivalued Attributes. Dashed Ellipses: Derived Attributes. Double Rectangles: Weak Entity Sets. Double Lines: Total participation of an entity in a relationship …
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The Entity
Multivalued Attributes
Database Management Systems
ER Model

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Attribute Type	Description	Example	Sources
Single-Valued	One value per entity	Nationality	¹ ³ ⁵
Multi-Valued	Multiple values per entity	Phone numbers	² ⁴ ⁶

Multivalued Attributes in DBMS
What are multivalued attributes in DBMS?Multivalued attributes can indicate a weak entity. They may need a separate table to represent the data correctly. This article provided much information about Multivalued Attributes in DBMS, including their pros, cons and how they work.
Multivalued Attributes in DBMS - Naukri Code 360
www.naukri.com/code360/library/multivalued-attribute
What is the difference between single-valued and multivalued attributes?Here are some critical differences between single-valued and multivalued attributes. Contain only one value for each entity instance. It can contain multiple values for each entity instance. It cannot be null. It can be null in some cases. It can be used as a primary or foreign key. It cannot be used as primary or foreign keys.
Multivalued Attributes in DBMS - Naukri Code 360
www.naukri.com/code360/library/multivalued-attribute
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8.2: Attributes - Engineering LibreTexts
https://eng.libretexts.org/Courses/Delta_College/Database_Design_-_NOT_GOOD/08%3A_Chapter_8_-_The_Entity_Relationship_Data_Model/8.2%3A_Attributes
Chapter 8 The Entity Relationship Data Model
https://opentextbc.ca/dbdesign01/chapter/chapter-8-entity-relationship-model/
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Composite and other attributes in the entity-relationship model

Problem with multi-valued Attributes - RelationalDBDesign

Types of Attributes in ER Model - GeeksforGeeks

Types of Attributes in ER Model - GeeksforGeeks

1.8: Chapter 8 The Entity Relationship Data Model

Multi-valued attribute - (Intro to Database Systems) - Vocab ... - Fiveable

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Multivalued Attributes in DBMS