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Technical Article

Making your database changes backward compatible: Changing a relationship

Let's face it: requirements change. There is usually a lot of churn during the design and initial development stages, but changes can happen to mature applications, too. The key is to introduce those changes with the least amount of effort and risk.

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2010-08-02

2,585 reads

External Article

Dynamic Data Driven Variable Hierarchical Structures in SQL

This article describes data driven variable structure generation in SQL. The controlling data can be located higher up on the hierarchical pathway or can be located further down on the pathway producing a look-ahead operation. Multiple pathways can independently produce dynamic data driven structures and these dynamic structures can be nested allowing a very flexible and powerful dynamic automatic data structure generation capability. These different controls of structure generation can be combined.

2010-07-27

2,757 reads

External Article

Oracle to SQL Server, Crossing the Great Divide, Part 3

We soon learn, in SQL Server, that heaps are a bad thing, without necessarily understanding how or why. Jonathan Lewis is an Oracle expert who doesn't like to take such strictures for granted, especially when they don't apply to Oracle. Jonathan discovers much about how SQL Server places data, and concludes from his experiments that heaps perform badly in SQL Server because you cannot specify a fill factor for them.

2010-07-23

3,312 reads

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Question of the Day

The Max PK Length

If I create a multiple column Primary Key constraint, what is the most number of bytes I can include in the constraint?

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