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A data model is a collection of concepts that can be used to describe the structure of a database and provides the necessary means to achieve this abstraction whereas structure of a database means the data types,relationships and constraints that should hold on the data.
Data model are divided into three different groups
they are
1)object based logical model
2)record based logical models
3)physical models
Types:
Entity-Relationship (E-R) Data Model
Object-Oriented Data Model
Physical Data Model
functional data model
What else can I help you with?
In databases a data category is called a .?
In databases, a data category is typically referred to as a "data type." Data types define the kind of data that can be stored in a particular column or variable, such as integers, strings, dates, and so on. Different database management systems offer various data types to accommodate different types of data.
What are the Names of the types of data models in an ER diagram in the proper sequence they should be created?
In an ER diagram, the types of data models created in sequence are entities, attributes, relationships, and constraints. Entities represent the real-world objects, attributes describe the properties of entities, relationships establish connections between entities, and constraints define rules for the relationships or attributes. This sequence helps in organizing the structure and relationships of the data model effectively.
What is a database field format?
A database field format refers to the data type and structure used to define a specific field within a database table. It determines how data is stored, validated, and interpreted within that field, such as text, numbers, dates, or binary data. Common field formats include VARCHAR for variable-length text, INT for integers, and DATE for dates.
What is the advantage of using different types of files as data source?
Using different types of files as data sources can provide flexibility in accessing and analyzing data. For example, CSV files are ideal for structured data, while JSON files can handle semi-structured data efficiently. By utilizing various file types, you can cater to different data formats and processing requirements in your analysis.
What are data models in dbms?
A data model is a collection of concepts that can be used to describe the structure of a database. Data models can be broadly distinguished into 3 main categories- 1)high-level or conceptual data models (based on entities & relationships) It provides concepts that are close to the way many users perceive data. 2)lowlevel or physical data models It provides concepts that describe the details of how data is stored in the computer. These concepts are meant for computer specialist, not for typical end users. 3)representational or implementation data models (record-based,object-oriented) It provide concepts that can be understood by end users. These hide some details of data storage but can be implemented on a computer system directly.
What are the different user define data typesexplain with example?
what are the different user define data types explain with example
In databases a data category is called a .?
In databases, a data category is typically referred to as a "data type." Data types define the kind of data that can be stored in a particular column or variable, such as integers, strings, dates, and so on. Different database management systems offer various data types to accommodate different types of data.
What is the hierarchy of the java program?
define the data types
Why do scientists use different types of models to represent compounds?
Scientists use different types of models to represent compounds because each type of model provides unique insights into the structure and properties of the compound. For example, ball-and-stick models provide a visual representation of atom arrangements, while computational models offer detailed quantitative data on molecular interactions. Using a variety of models helps scientists better understand and predict the behavior of compounds in different contexts.
What are the different data types?
Theres two types of data, Continuous and discontinuous data.
What are the Names of the types of data models in an ER diagram in the proper sequence they should be created?
In an ER diagram, the types of data models created in sequence are entities, attributes, relationships, and constraints. Entities represent the real-world objects, attributes describe the properties of entities, relationships establish connections between entities, and constraints define rules for the relationships or attributes. This sequence helps in organizing the structure and relationships of the data model effectively.
What is the need for structure datatype?
A structure is not a data type. We use structures to define new data types (user-defined data types). If we didn't have the ability to create user-defined types we'd be limited solely to the built-in data types and arrays of those types.
What are the types of database?
There are three database models. The three database models are as follows : 1) relational 2) network data 3) hierarchical
What type of graph is appropriate for a set of data?
Different types of graphs are appropriate for different types of data.
What is a Data Models?
A Data Model is a way to organize the data that you have, it gets the information and using a set of rules it makes sure that the data is good quality for you to use. Data Models are normally used to get data in, merge already existing data and to get data out. Data Models are also used for people that are working on the same project but in different groups to communicate. There are multiple different Data Models, each one has its own befits and problems through each one is designed for a certain job.
Discuss the main categories of data models?
Conceptual(high-level, semantic ) data models: Provide concepts that are close to the way many user perceive data. Physical(low -level, internal) data models: Provide concepts that describe details of how data is stored in the computer. Implementation(representational) data models: Provide concepts that fall between the above two, used by many commercial DBMS Implementation.
Difference between built in data type and user-defined datatype?
A built in data type is a framework's native data type. By default you'd probably have some built in generic data types, such as integer, string, boolean and so on. In the other hand sometimes you can extend the framework's data types, by programminga user-defined data type. In this data type you have to define it's behaviour and structure, and once defined, you can use it the same way you use the default data types. In PostgreSQL or Oracle, you can define data types. You can read about it on their webs.
