Author: Grzegorz Kaczor

CTO at e-point International

7 Common Database Design Errors

Why Talk About Errors? Model Setup 1 – Using Invalid Names 2 – Insufficient Column Width 3 – Not Indexing Properly 4 – Not Considering Possible Volume or Traffic 5 – Ignoring Time Zones 6 – Missing Audit Trail 7 – Ignoring Collation Why Talk About Errors?The art of designing a good database is like swimming. It is relatively easy to start and difficult to master. If you want to learn to design databases, you should for sure have some theoretic background, like knowledge about database normal forms and transaction isolation levels. But you should also practice as much as possible, because the sad truth is that we learn most… by making errors.

A Book Review

Book and Author Importance of Data Model Quality Takeoff Checklist Merciless Review Merciless Humiliation? Is it Agile? Conclusion Book and Author Today I’m going to review“A Check List for Doing Data Model Design Reviews”by Kent Graziano. This publication is available as an e-book on Amazon.com .The book is very short – it will take you less than an hour to read it. But don’t let the small volume mislead you. Graziano’s writing is very concise and full of information. There are no digressions, examples, anecdotes or metaphors. Just raw, austere instruction on what to check when designing a data model and why it is worthwhile to have the whole team review it before moving to the next steps of implementation. Even the title of the book is like the book itself – clear, not very attractive, but concise.

Testing Support from the Database Level

Testing is difficult. Good database design may make it more efficient and more easily applicable. It may help detect regression – a situation when a working code breaks due to some apparently unrelated change to the code.You cannot always afford comprehensive regression testing of your system. But what you usually can afford to do is to implement a repeatable process for build and automated testing of your system. It may cost a little at the start but it will pay off greatly later.