Christoffer Hedgate

I work in Lund, Sweden, at a company called Apptus Technologies. Apptus are specialized in database research and consulting, including development of search engines. Most of the time I work with SQL Server as an architect, administrator and developer, but I have also done some work with other DBMS such as Oracle and TimesTen. I also do some programming, mainly in Visual Basic, C# and Java (plus a couple of scripting languages).

I am also the co-owner of sql.nu (http://www.sql.nu/) where you can find more articles from me.
  • Interests: Movies, sports, databases, games

SQLServerCentral Article

Dealing With Changing Data

As Chris points out, in most applications these days you end up having to go with optimistic locking, which presents a few challenges. Chris works through the list of options. If you're building web/disconnected apps and need anything besides last update wins, this one is for you.

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2003-12-19

9,514 reads

SQLServerCentral Article

Cluster That Index!

Quite a while back Andy wrote an article about why not using primary keys and clustered indexes was a worst practice. Chris weighs in this week with a great article that gives some more in depth info on clustered indexes and why he thinks they should be used on every table.

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2003-03-30

18,847 reads

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RegEx Functions II

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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