As a freelance web developer, I have over the years encountered various MySQL data quality issues while developing various web projects. In web development databases are usually an after thought. Although many times the primary web application is solidly built, most programmers seldom give much thought to the database accuracy dimension. The book is focused primarily on data accuracy issues rather than database design issues like normalization etc. The book assumes you have your database designed and focuses on how to ensure that inaccurate data is not persisted into the database.
'Data Quality in MySQL' is primarily geared towards freelance PHP and MySQL developers. If you are a corporate developer or work for some big company than you probably have some kind of a company process regarding database design and quality issues and you would not need this book. For most freelance programmers, however, database quality issues are seldom on the list and only surface when the application starts giving inconsistent results over time. I'm generalizing here, as I know many freelance programmers personally who take database quality issues seriously. Although the title mentions 'MySQL', the book can be profitably read by other database developers. So, if you are a freelance programmer or working for a company, if you think that a little data quality refresher is needed than this book will help you cover that.
