Michael Coles


SQLServerCentral Article

Four Rules for NULLs

In SQL Server 2000 or any relational database, the concept of NULL can be both confusing and hazardess to your employment. Not understanding how to work with NULLs can lead to incorrect responses to queries and poor business decisions being made. New author Michael Coles brings us four rules that can help you work with NULL values in your tables.

4.9 (99)

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2008-03-28 (first published: )

93,896 reads

SQLServerCentral Article

Updated SQL Injection

SQL injection has been a hot topic the last couple years and there are some great articles at SQLServerCentral.com on this topic. Michael Coles brings us an updated look at this SQL Server security issue with some new examples you might not have previously thought.

4.03 (30)

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2008-03-21 (first published: )

84,825 reads

SQLServerCentral Article

NULL Versus NULL?

Dealing with NULL data is something that often confuses new SQL Server developers, but even experienced DBAs might not understand all the intricacies of NULL operations. In a follow up to his highly acclaimed Four Rules of Null article, Michael Coles brings us a few new
tricks with NULLs.

4.74 (81)

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2008-01-25 (first published: )

38,890 reads

SQLServerCentral Article

SQL 2005: Enter XML

SQL Server 2005 has greatly expanded the capabilities of SQL Server in many different areas. One of those that has matured greatly is the integration of XML data inside SQL Server. Longtime writer and guru Michael Coles brings us the first part of a two part series on XML ion SLQ Server 2005.

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2008-01-24 (first published: )

13,175 reads

SQLServerCentral Article

SQL 2005 Symmetric Encryption

One of the more interesting new features with SQL Server 2005 is the native encryption built into the product. Expert SQL crpytographer, Michael Coles, brings us a look at the symmetric keys in SQL Server 2005 and how they can be used to encrypt data and be secured by a certificate.

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2007-08-24 (first published: )

54,117 reads

SQLServerCentral Article

Sic Semper NULL

The great debate over NULLs will probably never end. Should we use them in our databases? What meaning do they have? These are all
valid questions. In this article SQL Server expert Michael Coles takes a look at the problems that are inherent in eliminating NULLs completely from
a database.

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2007-04-10

5,940 reads

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Question of the Day

Writing to Clones

I run this code on SQL Server 2019:

DBCC CLONEDATABASE(imdb, imdb_dev)
I then change to the cloned database, imdb_dev, and run some queries. I then run this code while testing:
INSERT dbo.Title (TitleID, Title, DateReleased) VALUES (3234, 'Maestro', '2023')
GO
What happens?

See possible answers