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Database Analysis and Design

Chapter 6 – Mapping from Logical ERD to Relational ERD

2 years ago by Presto BearDatabase Analysis and Design

[embeddoc url=”https://prestobear.com/wp-content/uploads/2018/12/Relational_Mapping.pdf” download=”none”]

Chapter 5 – Crow’s Foot Notation

3 years ago by Presto BearDatabase Analysis and Design

Crow’s Foot Notation is the most popular notion used to draw Database Modelling Diagram such as Entity Relationship Diagram (ERD) or Enhanced Entity Relationship Diagram (EERD). Note: 1.Participation/ Association: -The line that connects two entities denotes the participation/ association of two entities -The participation can… Read More

Database Forward Engineering vs Reverse Engineering

3 years ago by Presto BearDatabase Analysis and Design

1.Database Forward Engineering Database Forward Engineering is the process to create the Relational Model Diagram or export to a DDL file from a Logical Model Diagram. A Logical Model Diagram contains entities and relationship design for the database. It also contains columns for tables as… Read More

Chapter 4 – How to know Relation in 2NF or 3NF?

3 years ago by Presto BearDatabase Analysis and Design

First, we need to know about dependencies 1. Functional Dependencies -Dependency can be understand as one/more attributes depend on other one/more attributes Example: studentid –> (studentname, dob) (semesterid, courseid) –> coursefee 1.1 Functional Dependency (FD): This is the dependency of non-key attributes to key attributes… Read More

Chapter 3 – Table Index and Constraint

3 years ago by Presto BearDatabase Analysis and Design

1.Index -As we know that PK is the unique constraint in a table. -If we want to make one or more columns that are NOT keys but to be unique. We can create UNIQUE INDEX. Ex: tb1 (c1, c2, c3, c4, c5) –> We have… Read More

Chapter 2 – Entity, Type and Key

3 years ago by Presto BearDatabase Analysis and Design

1.Entity -By convert the relation, we have entities with attributes in each of entities -In each entities, we can define a Primary Key (PK) for an entity -A weak entity is an entity with a composite key. A weak entity is denoted by double rectangle… Read More

Chapter 1 – What is Normalization?

3 years ago by Presto BearDatabase Analysis and Design

Normalization is the process to normalize (split) a large relation (entity/table) into smaller relations (entities/tables) The Normalization start with a UNF (UnNormalization Form) form. Then, UNF will be processed into 1NF 2NF 3NF BCNF and ERD 1.1NF: First Normalization Form, in this phrase, we will:… Read More

Software Engineering Tool Collection

3 years ago by Presto BearDatabase Analysis and Design

A.System Analysis and Design Tool – Database Design Tool 1.Microsoft Visio – Commercial Software 2.Visual Paradigm – Community version 3.UMLet – Freeware 4.LucidChart – Freeware B.Database Modelling Tool 1.Oracle +Oracle SQL Developer Data Modeler – Freeware 2.MySQL +MySQL WorkBench – Freeware These tools enable to… Read More

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