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Technical Article

Understanding "Yukon" Schema Separation

Well it has finally arrived, at least in the Beta version. Microsoft's long awaited latest version of it's SQL Server product has arrived in Beta version and holds promise to be a major and successful revision of this fine product. I have had the Beta version for a few months now and one of the new security items that has intrigued me the most is the separation of users and schemas. I've worked with this form of separation before in Microsoft's chief competitor, but this article is not a comparison of the two products or the way they implement schema separation; it is an article on the basics of user/schema separation for those SQL Server DBAs who may have not worked with separated schema separation before.

2005-01-12

2,354 reads

Technical Article

Trace-scrubbing Tools

Andrew Zanevsky shares his trace-scrubbing procedures that make it easy for you to handle large trace files and aggregate transactions by type–even when captured T-SQL code has variations.

SQL Server Profiler is a veritable treasure trove when it comes to helping DBAs optimize their T-SQL code. But, the surfeit of riches (I'm reminded of the Arabian Nights tale of Aladdin) can be overwhelming. I recently had one of those "sinking" feelings when I first tried to make sense of the enormous amount of data collected by traces on a client's servers. At this particular client, the online transactions processing system executes more than 4 million database transactions per hour. That means that even a 30-minute trace that captures "SQL Batch Completed" events results in a table with 2 million rows. Of course, it's simply impractical to process so many records without some automation, and even selecting the longest or most expensive transactions doesn't necessarily help in identifying bottlenecks. After all, short transactions can be the culprits of poor performance when executed thousands of times per minute.

2005-01-11

2,003 reads

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Identity Defaults

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Question of the Day

Identity Defaults

What happens when I run this code? 

CREATE TABLE dbo.IdentityTest
(
     id int IDENTITY(10) PRIMARY KEY,
     somevalue VARCHAR(20)
)
GO

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