petkovic petkovic

petkovic
petkovic

Dusan Petkovic is professor of database systems at the Polytechnic in Rosenheim, Germany. He is the author of several books about database systems, including SQL Server 2005: A Beginner’s Guide (Osborne McGraw-Hill). Through a special arrangement with Osborne/McGraw-Hill, we invite you to preview a chapter from Dusan's new book on SQL Server Security Email address: petkovic@fh-rosenheim.de

Articles
Open Windows of Opportunity
Aggregate and rank window functions benefit BI projects.
Taming the Skew 1
SQL Server's query optimizer effectively executes queries that access skewed data, but you can help improve the response time of such queries. Here's how.
Indexing for Sort Performance
Defining the right indexes on sort columns can yield dramatic performance results for queries that need ordered data.
Which is Faster: Index Access or Table Scan? 1
It can be difficult to determine whether a table scan or an index will provide better query performance. The answer depends in part, on the percentage of rows returned, but another important factor is whether you use a clustered or nonclustered index.
New Features for Query Processing
The query processor is one of the most important database system components that influence the management of large databases. SQL Server 7.0's focus is on new techniques for maximizing your query performance.

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From the Blogs
Mar 17, 2015
blog

AlwaysOn Availability Groups and SQL Server Jobs, Part 21: Assigning Backup Preferences

An option when creating new AlwaysOn Availability Groups is to specify Backup Preferences. It’s also something you can easily configure once the Availability Group has been set up as well – by simply right-clicking on the Availability Group and selecting Properties – then navigating into the Backup Preferences tab.  ...More
Mar 14, 2015
Commentary

For Data Quality, Intelligent Rules Add Value to the Golden Record 5

The quest for the Golden Record to achieve a single, accurate and complete version of a customer record is worth the pursuit to attain survivorship. Record matching and consolidation are only the beginning. Melissa Data takes a new approach. Learn how to apply intelligent rules based on reference data to make smarter and better decisions for data cleansing....More
Mar 12, 2015
blog

AlwaysOn Availability Groups and SQL Server Jobs, Part 20: Avoiding Backup Fragmentation

On SQL Servers where Availability Groups (or Mirroring) isn’t in play, I typically recommend keeping a combination of on-box backups along with copying said backups off-box as well. Obviously, keeping databases AND backups on the SAME server is the metaphorical equivalent of putting all of your eggs in one basket – and therefore something you should avoid like the plague....More
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