3. What is a data model? Hierarchical | Network | Relational | Entity-relationship model

Q. What is a data model?
Ans. A data model is an abstract model that organizes elements of data in a certain format. The data model decides the structure or the method of storing the data in the database. It also makes sure that the data is related to one another.
The data model also makes sure how the DBMS will manage the data in the database that is how will the data be stored, accessed, or updated.
Q.What are the types of data models?
Ans. There are four types of data models
1. Hierarchical model
2. Network model
3. Relational model
4. Entity-relationship model
In this video, we discuss the types of data models with examples.
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[@ConstantLearners_AI_ML_CS]

Hello guys!
Quick question. Would you like anymore videos on Big Data, Data Science or any other topics?
Please let me know. I'm focussed more on CSS tutorials right now.

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

Thank you
How was your exam?
Which semester? Which board?

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

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Are there only 4? I see some sites have object-oriented, flat data model etc.

[@ConstantLearners_AI_ML_CS]

Yes there are more, but the most basic ones are these. For example, Object-oriented databases were built to overcome the drawbacks of RDBMS and give databases more strength and structure.

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[@ConstantLearners_AI_ML_CS]

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[@immanueljuma5846]

If I may ask,, is there anything like object oriented database model please explain

[@ConstantLearners_AI_ML_CS]

Yes there is OODM. But in this video I have only explained the basic database models. OODM is an advanced kind where data is stored in the form of objects. If you have learnt object oriented programming languages, it is easy to understand OODM also. In relational databases we could store only a single kind of data in tables. But in OODM we can store any form of data in the form of objects. And these objects are real world entities.

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

Sure! Will try my best. Thank you for the suggestion.

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Maam pls explain object oriented data model and dimenstional model data base, today pls , tomorrow is my exam

[@ConstantLearners_AI_ML_CS]

Oh! I am sorry. I hope your exam was okay.

[@randikemendis5860]

Good Explanation
P.S:- ERD relationship part I have got clear. in this example Doctor --> Duties --> Department "When it go like that his all operations related to that department will cover by one relationship. is it ok ?

[@ConstantLearners_AI_ML_CS]

Thank you so much. I am glad the video could help.
Yes you are right, the doctor's duties in that department will connect him to that department, because the doctor has duties in that particular department. So in the doctor's table and the department's table, some entries will be same like doctor's visiting hours, etc and thus establish a relationship between both. I hope I was clear.

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[@ConstantLearners_AI_ML_CS]

Thank you. Sorry about the volume. That was one of the oldest videos I made. I was very new to recording and editing🙂

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[@ConstantLearners_AI_ML_CS]

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[@ConstantLearners_AI_ML_CS]

Hey! Sorry that was a very old video. I was new to editing and recording. If you have any doubts please let me know, I will be happy to help :)

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[@ConstantLearners_AI_ML_CS]

Thank you. Sorry for the trouble. Let me know which words were unclear.

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[@ConstantLearners_AI_ML_CS]

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