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DBMS Chapter 2: DBMS Data Models

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19 Jan 2023

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SAGE University - SU

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Document Summary

A data model in database management system (dbms), is the concept of tools that are developed to summarize the description of the database. It is classified into 3 types: conceptual data model: Conceptual data model, describes the database at a very high level and is useful to understand the needs or requirements of the database. It is this model, that is used in the requirement gathering process i. e. , before the database designers start making a particular database. One such popular model is the entity/relationship model (er model). The e/r model specializes in entities, relationships and even attributes which are used by the database designers: representational data model: This type of data model is used to represent only the logical part of the database and does not represent the physical structure of the databases. The representational data model allows us to focus primarily, on the design part of the database.

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Related Questions

Of the two Lewis/electron dot structure representations, which is the correct?

one for hydrogen cyanide?

A. H=C=N

B. H-C=N

In this assignment you will be creating a model or replica of an animal cell or plant cell. This can be done in many different ways and you are encouraged to be creative. Below you will find a list of what you must do and include in this project as well as a grading rubric for your final submission.

Your project is to create a model or replica of a plant or animal cell. This can be done using, materials that you have at home. Feel free to be creative in how you represent each aspect of the cell. You can use craft materials, candy, food, or any other materials you have access to.

Your model will need to include the cell type you chose and all of its major organelles. Each part, of the cell should have a unique visual representation. Your model must include a label for every. part of the cell or a separate key that describes how each organelle is represented. You will also describe the purpose or function of each organelle. This can be done on a separate piece of paper and can be written in an essay format or as a list.

Depending on the cell type you choose, you will need to include all of the following organelles:

Cell Wall (Plant cell only)
Cell Membrane
Nucleus (with DNA)
Nuclear Membrane
Endoplasmic Reticulum (smooth and rough)
Ribosomes
Mitochondria
Golgi Body
Lysosomes (Animal cell only)
Vacuoles
Chloroplasts (Plant cell only)

Submission:

You will submit this project as a picture of your model and descriptions of the organelles.

Biology Special Lesson: Make a Cell

Grading Rubric

Make a Cell Project

In this assignment you will be creating a model or replica of an animal cell or plant cell. This can be done in many different ways and you are encouraged to be creative. Below you will find a list of what you must do and include in this project as well as a grading rubric for your final submission.

Your project is to create a model or replica of a plant or animal cell. This can be done using materials that you have at home. Feel free to be creative in how you represent each aspect of the cell. You can use craft materials, candy, food, or any other materials you have access to.

Your model will need to include the cell type you chose and all of its major organelles. Each part of the cell should have a unique visual representation. Your model must include a label for every part of the cell or a separate key that describes how each organelle is represented. You will also describe the purpose or function of each organelle. This can be done on a separate piece of paper and can be written in an essay format or as a list.

Depending on the cell type you choose, you will need to include all of the following organelles:

Cell Wall (Plant cell only)
Cell Membrane
Nucleus (with DNA)
Nuclear Membrane
Endoplasmic Reticulum (smooth and rough)
Ribosomes
Mitochondria
Golgi Body
Lysosomes (Animal cell only)
Vacuoles
Chloroplasts (Plant cell only)

You will submit this project as a picture of your model and descriptions of the organelles.