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.

Technical Article

To find the next available ID

There are times when you have a limited range of ids and these have to be re-used as they become available.The script lists the first missing id in a table.Note that this script works best for a table with a limited number of rows, say sub 100,000I tested this on a PIII 500MHz 256Mb RAM […]

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2002-12-09

274 reads

SQLServerCentral Article

Querying XML files using SQL 2000

One of the many useful features gained by SQL Server 2000 is the ability to handle XML documents. This means that any computer language capable of opening an XML files and calling SQL Server stored procedures can make use of this new ability. This article by David Poole shows you how!

(1)

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2002-10-11

12,023 reads

Technical Article

Function to return a delimited list as a table

This SQL2000 function accepts a delimited list of values as a string and the character you want to use as a delimiter.The function then splits these out and returns them as a table.The function assumes that the input string will contain unique integer values.Useage: -  SELECT Id FROM fnSplit('1,2,3,4' , ',')

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2002-06-27

586 reads

Technical Article

Loop through records without using a cursor

I sometimes have to loop through records in a database and perform a specific action on the value that is returned. For example, In the script below I loop through the user tables in sysobjects and simply print them out. This technique is useful when dropping all indices/triggers on a particular table, or adding WITH […]

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2001-11-25

9,190 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