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What Logical data independence and physical data?
what is physical datd independence
Difference between logical database and physical database?
The logical database is how the data is percieved in the tables, the way the data is actually stored on the storage medium is the physical view of the database.
Is center of mass a reality?
It is better to think of it as an abstraction - but one that is very useful for many practical calculations.
Why use a sensor to capture physical data?
sorry i have the same question for ICT and i've been searching for the answer for EVER! but i don't know! i'm so sorry :'(
How is physical model different from mathematical model?
A mathematical model is made up of mathematical equations and data. These models allow you to calculate things such as how far a car will travel in an hour or how much you could weigh on the moon. Physical models are models that you can touch. Toy cars, models of buildings, maps, and globes are all physical models.
Which level of Abstraction describes how data are stored in the data base?
how data are stored would be in a physical layer
Show the difference bw 3-levels of data abstraction in DBMS?
The three levels of data abstraction in a DBMS are physical, logical, and view. Physical level: Describes how data is stored in the database, including details like data storage and access paths. Logical level: Focuses on the structure of the data in the database, including schemas, tables, and relationships. View level: Represents how users view the data, providing a customized and simplified representation of the data to different user groups.
What is data abstraction and data hiding in oops concepts?
abstraction is show nonessential data to user ,
What is data abstraction?
Data abstraction is the reduction of a body of data to a simplified representation of the whole. Data abstraction is usually the first step in database design in order to create a simplified framework that can be added to in order to complete the database.
Is data hiding and abstraction are same?
no
What is data abstraction in DBMS?
Purpose of database users with an abstract view of the data that is system hides certain details of how the data are stored and maintained. It gives an architecture is to separate the user applications and the physical database.
What are the duties of data abstraction clerk?
health
What is the difference between data hidding and data abstraction?
Abstraction: Abstraction refers to removal/reduction of irrelevant data or unnecessary data or confidential data from a Class. Data hiding: Data hiding is a feature provided by the abstraction for hiding the data from the class.
Layers of data abstraction in dbms?
select*from stludent
Which model operates at the lowest level of abstraction?
physical
What are the characteristics of OOPS?
Data Encapsulation, Abstraction, Inheritance, Polymorphism
Does a relational model provide physical and logical data independence?
Since a user can define a views, logical data independence can achieved by using view definition to hide changes in the conceptual schema. since the sql user has no knowledge of how the data is physically represented, relying solely on the relation abstraction for querying, physical data independence is also achieved.
