Additional 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

Technical Article

Manipulating Microsoft SQL Server Using SQL Injection

Focuses on advanced techniques that can be used in an attack on an application utilizing Microsoft SQL Server as a backend. These techniques demonstrate how an attacker could use a SQL Injection vulnerability to retrieve the database content from behind a firewall and penetrate the internal network. Also provided are recommendations on how to prevent such attacks.

2005-01-05

2,626 reads

Technical Article

Get the Value of a BitMask

This function will take a 64 bitmask string and return the value of bitmask. If you need 128, 256, etc simply change the length of the parameter, being careful to remember you may need to change the return type of int to BigInt if you get too long.

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2005-01-04 (first published: )

254 reads

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Detecting Characters

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Question of the Day

Detecting Characters

I have a SQL Server 2022 English default installation on a server. I want to detect if there are any upper case characters in rows and I have this code:

SELECT CustomerNameID,
       CustomerName
 FROM dbo.CustomerName
 WHERE CustomerName = LOWER(CustomerName)
Here is the sample data I am testing with:
CustomerNameID CustomerName
1              John Smith
2              Sarah Johnson
3              MICHAEL WILLIAMS
4              JENNIFER BROWN
5              david jones
6              emily davis
7              Robert Miller
8              LISA WILSON
9              christopher moore
10             Amanda Taylor
How many rows are returned?

See possible answers