Home  Fees/Services  Access Examples  Tutorials  Access Downloads  Articles  Search  Contact  Privacy  Links
1st Normal Form

Link Database Tables
0th Normal Form (0nf)
First Normal Form
Second Normal Form
3rd Normal Form
Table Design Summary
Table Design Tutorial
Access Join Tables

Table Level Events

Repair Corrupted Table

First Normal Form

First Normal Form Definition

  • Repeating groups of fields have been removed

  • Data is positional independent (columns do not contain database data: i.e. sales_2001, sales_2002

  • Each field (cell) contains only a single value

  • Every row in the table contains the same column names and data types as the previous row

  • A primary key has been defined

  • Each attribute field is linked to a primary key field (in our example below, Emp_Hire_Date is linked to key field Employee_Name and Project_Manager is linked to key field Project_Name)

A summary of this list above is often stated as 'All fields in the database are atomic', meaning they are reduce to a single data value in each cell of the table.


The following table is in first normal form (1NF/1ST):

Project_Name             (primary key field when combined with Employee_Name)


Problems With Data Stored in 1NF

Data duplication: within the same project the project manager name will be duplicated.  If the manager is replaced then all records for that project will need to be updated (cascade update related records).  The result is more space is used for each record and processing time is consumed checking updates and performing updates.

To add a project manager you should already have an employee in the project.

See our 2nd normal form table design discussion.

A Blue Claw Database Design Article:

Access Form Design Help

Blue Claw Database Design Downloadable Tutorial:
Popup Form Control Method  

A Blue Claw Software Design Template:

Farmer's Feed Inventory Tracking Database

Microsoft Office:
MS Access 2003
Access 2007
Access 2010
Access 2013
Access 2016

Contact Information

Copyright 2000-2017 Blue Claw Database Design

Microsoft Access 2007, Access 2010, MS Access 2013