Recently I came across with an article on DB2 about using Union instead of OR. So I thought of carrying out a research on SQL Server on what scenarios UNION is optimal in and which scenarios OR would be best. I will analyze this with a few scenarios using samples taken from the AdventureWorks database
2011-07-06
6,349 reads
: "It is a narrow mind that cannot see things from more than one point of view." —George Eliot
2011-07-05 (first published: 2009-05-20)
8,245 reads
Indexes speed retrieval of rows from database tables or views. Here are the top index-related T-SQL statements that SQL Server DBAs should know.
2011-07-05
8,937 reads
It is recommended that you remove all special characters and HTML formatting. This task can be handled in TSQL code, however in this case I have the opportunity to use .NET and the power of the regular expressions to manage the string. In this tip, I'll build a CLR function which cleans up a string of HTML tags and special characters. I'll use Visual Studio 2010 with C# as the programming language. Check out this tip for my solution.
2011-07-04
3,902 reads
Arshad Ali examines the different types and different layers of security that SQL Server Service Broker provides during communication and while accessing Service Broker objects.
2011-07-04
1,810 reads
Monitoring your SQL Server instances and figuring out what's going on is important to keep an eye on your environment. David Bird brings us a new series that looks at how you might start setting this up with Integration Services.
2011-07-01 (first published: 2008-01-07)
27,825 reads
FTP Task lets you copy files across distributed, frequently incompatible systems.
2011-07-01
3,288 reads
Learn the basics of first normal form and what that means to a database designer from Tom Thomson.
2011-06-30
10,898 reads
2011-06-30 (first published: 2009-05-13)
7,312 reads
I have seen several tips on SQL Server Central Management Server and I want to implement the technology for my team. The only thing holding me back is security. Can you explain how security works with Central Management Server? What security access is needed to manage CMS? How about connecting to CMS? How about running a query using CMS? Check out this tip to answer these questions.
2011-06-30
2,912 reads
By Steve Jones
I don’t have SQL Server installed on my laptop. In an effort to keep...
Slow-running queries can degrade your Redshift cluster’s performance and lead to increased costs. Identifying...
By gbargsley
If you've been here before, you know this blog is usually about SQL Server,...
Hi all Can I get some perspective from the community please on performing in-place...
Comments posted to this topic are about the item How Long is a Long...
Comments posted to this topic are about the item T-SQL Trigonometric Functions in SQL...
In SQL Server 2025, a long I/O is recorded in the error log with message 833. How long much an I/O request be outstanding before this message is written to the log?
See possible answers