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Technical Article

Whether to use UNION or OR in SQL Server Queries

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

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2011-07-06

6,349 reads

External Article

Remove HTML tags from strings using the SQL Server CLR

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

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Question of the Day

RegEx Functions II

I have this data in a table in a SQL Server 2025 database:

EmailAddressID EmailAddress
7              dylan0@ADVENTURE-WORKS.COM
8              Diane1@ADVENTURE-WORKS.COM
If I run this query, which row(s) are returned?
SELECT top 10
 *
 FROM person.EmailAddress
 WHERE REGEXP_LIKE(EmailAddress, '^d')
 AND BusinessEntityID IN (7,8)

See possible answers