David Poole

David Poole has been developing business applications since the days of the
Commodore Pet.

Those were the days when 8K was called RAM not KEYBOARD BUFFER.

He now works as Data Solutions Architect at Moneysupermarket
  • Interests: Badminton, Cycling and Music. Keen piano player.

SQLServerCentral Article

An Is Null Gotcha

In T-SQL you should use the IS NULL keywords to test for a null value. But David Poole runs into a strange gotcha in one of his applications where he is testing for a null value. It's an interesting read following Sherlock Poole around on his hunt to find an error.

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2004-07-14

11,707 reads

SQLServerCentral Article

Reducing Round Trips - Working with HTML Checkboxes

Reducing the amount of round trips between a server and client is something that can give you a great boost in performance. David Poole looks at how he solved a problem with HTML checkboxes and the challenges they solve in a programming environment. Without Dynamic SQL!

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2004-06-11

9,238 reads

SQLServerCentral Article

Using Bits to Store Data

David recently worked on a project where it turned out storing the answers to a survey using bitmapping was a good approach. He was good enough to write some of it down and share. As he notes bitmapping isn't used as often as it used to be, but it can still be a useful technique to have around.

(1)

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2004-01-06

6,422 reads

SQLServerCentral Article

Dealing with Addresses

David writes about the system he put together to handle addresses and the pros and cons of various techiques. Familiar with Soundex? He uses that too! Even though some of the info is specific to Great Britain, it's good reading. Addresses are one of the hardest pieces of information to handle!

(3)

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2003-07-01

11,248 reads

Technical Article

Inherriting objects from an updated MODEL database

If new objects are created in the model database then these new objects only get created for new databases.Similarly, if objects are removed from user databases then getting them back into the database can be a pain.The following two stored procs copy objects from model to the current database if they do not already exist.

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2003-01-10

42 reads

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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