Get A Developer's Guide to Data Modeling for SQL Server: PDF

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By Eric Johnson

ISBN-10: 0321497643

ISBN-13: 9780321497642

Powerful info modeling is vital to making sure that your databases will practice good, scale good, and evolve to fulfill altering specifications. although, if you are modeling databases to run on Microsoft SQL Server 2008 or 2005, theoretical or platform-agnostic info modeling wisdom isn't really adequate: versions that do not replicate SQL Server's targeted real-world strengths and weaknesses frequently bring about disastrous functionality.

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Extra resources for A Developer's Guide to Data Modeling for SQL Server: Covering SQL Server 2005 and 2008

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These two tables were just about perfect; they had a purpose, and all the information they contained pertained to the entity the table represented. These two tables were also the only two tables in the database that were easy to navigate and retrieve data from. That brings me to the Question table, which, as the name suggests, stored the questions for the exams. This table also stored the possible answers the students could choose. 5, this table had problems. info 12 Chapter 1 Data Modeling Overview Let’s take a look at what makes this a bad design and how that affects data retrieval.

Don’t get me wrong—I am not saying that all performance problems stem from bad design, but often bad design causes problems that can’t be corrected without a redesign. If the data model is sound from the get-go, you can focus your energy on actually tuning the database using indexes, statistics, or even access methods. Again, just like a house, a database that has a solid foundation lets you repair the problems that occur. The Process of Data Modeling This book is written as a step-by-step, process-oriented look at data modeling.

In fact, this new model doesn’t need to be scaled. We can still enter one address for each customer, but we can also easily enter more addresses when the need arises. Additionally, each address can be labeled so that we can tell what the address is for. Meeting Business Requirements Many big, expensive solutions have been implemented over the years that serve no real purpose—IT only for the sake of IT. Some people thought that if they bought the biggest and best computer system, all their problems would be solved.

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A Developer's Guide to Data Modeling for SQL Server: Covering SQL Server 2005 and 2008 by Eric Johnson

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