Articles

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

SQLServerCentral Article

SQLServerCentral.com Celebrates our 200,000 Member Milestone

Many thanks from Andy, Brian, and Steve to everyone for their participation and efforts in building the best SQL Server site and the best community on the Internet. In appreciation of their efforts, we've given away a few gifts to some random members.

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2005-01-10

2,479 reads

SQLServerCentral Article

SwisSQL Helps Major ERP Vendor in Database Migration of Oracle to SQL

SwisSQL develops products for SQL Server and other RDBMSs that ease the migration between platforms. They have provided us with a case study to show how you can easily move data from an Oracle system to the premier database platform, SQL Server. Check out this case study of how one of the ERP vendors used their product to migrate their code.

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2005-01-05

3,109 reads

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Question of the Day

Multiple Values Inserted

I have this code on SQL Server 2022. What happens when it runs all at once?

DROP TABLE IF EXISTS dbo.Commission
GO
CREATE TABLE dbo.Commission
(id INT NOT NULL IDENTITY(1,1) CONSTRAINT CommissionPK PRIMARY KEY
, salesperson VARCHAR(20)
, commission VARCHAR(20)
)
GO
INSERT dbo.Commission
( salesperson, commission)
VALUES
( 'Brian', 12 ),
( 'Brian', 'None' )
GO
 

See possible answers