Articles

External Article

Understanding the SQL Server 2012 BI Semantic Model (BISM)

SQL Server 2012 introduced an unified BI Semantic Model (BISM) which is based on some of the existing as well as some new technologies. This model is intended to serve as one model for all end user experiences for reporting, analytics, scorecards, dashboards, etc. In this tip, I will talk in detail about the new BISM, how it differs from earlier the earlier Unified Dimensional Model (UDM) and how BISM lays down a foundation for future.

2012-11-27

3,420 reads

External Article

SQL Server Transaction Log Fragmentation: a Primer

Generally, you will have no need to worry about the number of virtual log files in your transaction log. However, if you use the default settings for 'auto-grow', you can end up with such 'fragmentation' in your transaction log as to affect performance noticably. How can this be avoided? How can you tell it's a problem? What do you do about it? Greg explains.

2012-11-23 (first published: )

7,126 reads

Technical Article

Performance Tuning Re-indexing and Update Statistics – A Case Study

Recently we started experiencing a very strange issue in our production reporting environment where the Re-indexing and Update Statistics operation suddenly began taking more than 2 days to complete and was thus causing blockage in the database which in turn caused impairment in application performance.

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2012-11-20

5,852 reads

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Question of the Day

BIT_COUNT() IV

In SQL Server 2025, I run this code:

select bit_count('A')
What is returned?

See possible answers