8. Which of the following can be a multivalued attribute? Explanation: Name and Date_of_birth cannot hold more than 1 value.
Similarly, what is a multi valued attribute?
A multivalued attribute of an entity is an attribute that can have more than one value associated with the key of the entity. For example, a large company could have many divisions, some of them possibly in different cities.
One may also ask, is phone number a multivalued attribute? Some attributes can have multiple values for a given entity. For example, a customer could provide several telephone numbers, so the telephone number attribute is multivalued. Attributes help distinguish one entity from other entities of the same type.
Simply so, which of the following can be used as multi value attribute in ER model?
Discussion Forum
| Que. | Which of the following can be a multivalued attribute ? |
|---|---|
| b. | Name |
| c. | Date_of_birth |
| d. | All of the mentioned |
| Answer:Phone_number |
Is date a multivalued attribute?
Dates are internally stored as 2 integers. The first integer is the number of days before or after the base date (1900/01/01).
Related Question Answers
What is the difference between a simple and a multi valued attribute?
Single valued attribute have only single value. Multivalued attributes could have multiple values. A person can have multiple phone numbers,multiple degrees etc. Multivalued attributes are shown by double line connecting to entity in ER diagram.What are the types of attributes?
Types of Attributes-- Simple attributes.
- Composite attributes.
- Single valued attributes.
- Multi valued attributes.
- Derived attributes.
- Key attributes.
What do you mean by single valued and multi valued attributes?
Attributes that can have single value at a particular instance of time are called single valued. A person can't have more than one age value. Therefore, age of a person is a single-values attribute. Multi valued attributes: A multi-valued attribute can have more than one value at one time.How can we make attributes have multiple values?
Attribute Element (Handling Multiple Values)- use a “primitive attribute” and append, with a separator character, the multiple values into one string, or.
- use the FME attribute list, or.
- retain one attribute value out of the multiple values.
How do I create a multi valued attribute in SQL?
To implement a multi-valued property:- Set the table type attribute to multi :
- Set the multi-column-name attribute of the table tag:
- The multi-valued property in this table must set its data-type attribute to array , set , map or list :
What are attributes theory?
The theory of attributes deals with qualitative types of characteristics that are calculated by using quantitative measurements. Attributes refer to the characteristics of the item under study, like the habit of smoking, or drinking. So 'smoking' and 'drinking' both refer to the example of an attribute.What are attributes?
An attribute is defined as a quality or characteristic of a person, place, or thing. Real life individuals and fictional characters possess various attributes. For example, someone might be labeled beautiful, charming, funny, or intelligent.Which one of the following is a single valued attribute?
Discussion Forum| Que. | Which of the following is a single valued attribute |
|---|---|
| b. | Address |
| c. | SUBJECT_TAKEN |
| d. | Reference |
| Answer:Register_number |
Which one of the following attribute can be taken as a primary key?
Which one of the following attribute can be taken as a primary key? Explanation: The attributes name, street and department can repeat for some tuples. But the id attribute has to be unique. So it forms a primary key.What relation model is called in relation?
Relational Model (RM) represents the database as a collection of relations. A relation is nothing but a table of values. Every row in the table represents a collection of related data values. These rows in the table denote a real-world entity or relationship. In the relational model, data are stored as tables.What is derived attribute in ER diagram?
A derived attribute is one whose value is dynamic and derived from another attribute. It is represented by dashed oval in an ER Diagram. For example – Person age is a derived attribute as it changes over time and can be derived from another attribute (Date of birth).Can a multivalued attribute be a primary key?
Multivalued attributes cannot work as primary keys. Actually, multivalued attributes violate First Normal Form. So the good idea is to create a separate table and push multivalued attribute into it. BTW, if any unique combination of D will define unique value of E, you can use E as primary key.Which of the following is a single valued attribute MCQS?
Explanation: Register_number is a single valued attribute.What is composite attribute?
Composite Attribute –An attribute composed of many other attribute is called as composite attribute. For example, Address attribute of student Entity type consists of Street, City, State, and Country. In ER diagram, composite attribute is represented by an oval comprising of ovals.
How do you deal with multivalued attributes?
As a general rule, if you run across a multivalued attribute, this is a major hint that you need another entity. The only way to handle multiple values of the same attribute is to create an entity in which you can store multiple instances, one for each value of the attribute (for example, Figure 5-9).What is key attribute?
A key attribute is the unique characteristic of the entity. For ex. Name and hire date are attributes of the entity Employee.What is multivalued attribute give example?
A multivalued attribute can have more than one value at a time for an attribute. For ex., the skills of a surgeon is a multivalued attribute since a surgeon can have more than one skill. Another common example is the address field, which can have multiple values like zipcode, street address, state, etc.What is a simple attribute?
Simple attribute − Simple attributes are atomic values, which cannot be divided further. For example, a student's phone number is an atomic value of 10 digits. Composite attribute − Composite attributes are made of more than one simple attribute. For example, a student's complete name may have first_name and last_name.What is atomic attribute?
Atomic (or single valued) An atomic attribute is always represented by a single value for a particular entity. For example, a person's marital status is always an atomic attribute. Most attributes are atomic attributes. Multivalued A multivalued attribute may have one or more values for a particular entity.How foreign key is represent in ER diagram?
The ER model does not use foreign keys to represent relationships. It uses lines between boxes. The lines have some kind of indicator for cardinality at either end or both ends. Sometimes, a relationship will be indicated separately by a diamond.What is entity and attribute?
The fundamental difference between the entity and attribute is that an entity is an object that exists in a real-world and can be easily distinguished among all other objects of real-world whereas, the attributes define the characteristics or the properties of an entity on the basis of which it is easilyCan an entity have only one attribute?
Yes, but. If an entity only has one attribute, then that attribute must serve as an identifier for the entity. Typically, if only one attribute is found for an entity in the given data stream, then another attribute is "invented" for purposes of identifying.What kind of attribute is date of birth?
Single-valued attributeYou 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.
