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ReallyBadDesignDecisions.doc (beginner)

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Roger Carlson View Drop Down
Microsoft MVP
Microsoft MVP


Joined: 20 Feb 2008
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    Posted: 28 Jul 2008 at 10:33pm

Please consider donating $1 per sample downloaded, find out why here.
 

ReallyBadDesignDecisions

Case study of a really bad database design based on the assumption that the paper form should determine the database design. Includes the proper design.

Sometimes a single design decision can have a cascade effect, which causes multiple, secondary design errors. One such error, commonly made by novice developers, is to slavishly follow a pre-existing paper form to determine their table design.

But paper forms are not created with proper database design in mind. They are designed to make it easy for humans to fill out. This design can be at odds with established design principles. By blindly following the paper form to determine the database design, the developer can create a system subject to numerous data and relational integrity errors.

Document with Sample Databases. This ZIP file contains two databases: "ReallyBadDatabase.mdb" and "ReallyBadDatabaseReborn.mdb".

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Access 2000 (547 KB):
ReallyBadDesignDecisions2k.zip
 
Access 97: (143 KB)  ReallyBadDatabase97.zip
 (Note: the 97 version has both database examples, but does not have a copy of the article.)
 
Consider donating $1 per sample downloaded, find out why here.<
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