Data Modeling Archives - Essential SQL

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Category: Data Modeling

Common Questions, Data Modeling

What is the difference between a primary and unique key?

In this article we learn the difference between a primary and unique key, and ...

Data Modeling, Puzzles

Data Modeling Principles in Action

In this puzzle, we’re going to learn how to do some basic data modeling. ...

Common Questions, Data Modeling

Foreign and Primary Key Values – What is the Difference?

This article will teach you the difference between a primary key and foreign key. ...

Database Third Normal Form Explained in Simple English

This is the fourth in a series of posts teaching normalization. The third post ...

Database Second Normal Form Explained in Simple English

This is the third in a series of posts teaching normalization. The second post ...

Learn about the First Normal Form and Database Design

This is the second in a series of posts teaching normalization. The first post introduced ...