PLUG IT IN 3 Fundamentals of Relational Database Operations.

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Presentation transcript:

PLUG IT IN 3 Fundamentals of Relational Database Operations

1.Query Languages 2.Entity–Relationship Modeling 3.Normalization and Joins

>>> 1.Understand the process of querying a relational database. 2.Understand the process of entity–relationship modeling. 3.Understand the process of normalization and the process of joins.

Query Languages PI3.1 Primary Key Secondary Key Foreign Key Structured Query Language (SQL) Query By Example (QBE)

Entity-Relationship Modeling PI3.2 Entity Relationship Modeling Entity Relationship Diagram (ERD) Business Rules Data Dictionary Relationships (Unary, Binary, Ternary)

Entity-Relationship Modeling (Continued) PI3.2 Connectivity Cardinality Attributes

Cardinality Symbols

One-to-One Relationship

One-to-Many Relationship

Many-to-Many Relationship

Normalization and Joins PI3.3 Normalization – 1 st Normal Form – 2 nd Normal Form – 3 rd Normal Form Functional Dependencies Join Operation

Raw Data Gathered from Pizza Shop Orders

Functional Dependency from Pizza Shop

1 st Normal Form for Pizza Shop Database

2 nd Normal Form for Pizza Shop Database

3 rd Normal Form for Pizza Shop Database

Join Process with Tables of 3 rd Normal Form for Pizza Orders