Michael Coles


SQLServerCentral Article

Free Encryption

Free SQL Server 2000 Encryption for your data!!! Author Michael Coles has put together a tolljit and some XPs that you can use to encrypt your data with the Blowfish algorithm. It is hard to write good applications that encrpyt data and manage the keys and security. This will give you a great headstart on protecting your data.

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2018-10-10 (first published: )

78,931 reads

SQLServerCentral Article

The Hazards of IT

Are you taking care of yourself as an IT professional? We try to cover all aspects of your SQL Server career here, not just the technical stuff. Longtime SQL Server guru Michael Coles brings us some health tips in an interview with Dr. Jerry Sanders

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2008-05-23 (first published: )

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SQLServerCentral Article

Gotcha! SQL Aggregate Functions and NULL

Working with NULL functions can be tricky in T-SQL and SQL Server 2000. If you add in aggregates, you need to be sure you understand what the behavior will be or you might report incorrect values to a user. Michael Coles has written a new article that talks about how NULL affects your results.

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2008-04-04 (first published: )

106,331 reads

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.

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2008-03-28 (first published: )

94,956 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.

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2008-03-21 (first published: )

85,120 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.

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2008-01-25 (first published: )

39,222 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: )

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Fun with JSON I

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Question of the Day

Fun with JSON I

I have some data in a table:

CREATE TABLE #test_data
(
    id INT PRIMARY KEY,
    name VARCHAR(100),
    birth_date DATE
);

-- Step 2: Insert rows  
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
     (
         SELECT t.* FROM #test_data AS t FOR JSON PATH
     )
             ) t;

See possible answers