Derek Wilson

Derek Wilson delivers tactical and strategic Business Intelligence and Enterprise Architecture solutions. His primary focus in on Microsoft SQL Server technologies and aligning business problems to technology solutions. He architects BI solutions leveraging SQL Server, SharePoint and any other technologies that help his clients achieve better data driven decisions. By leveraging the information learned while collecting requirements for BI projects, he helps align business processes to technology helping further organizations Enterprise Architecture. He is an author, trainer, blogger and has been using SQL Server since version 6.5.

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Blogs

In-Person CISA Training – April 13-16, 2026

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I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...

EightKB 2026

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EightKB is back again for 2026! The biggest online SQL Server internals conference is...

The FinOps Lifecycle: From Budgeting to Reporting

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Working in DevOps long enough teaches you two universal truths: That’s exactly why I...

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Forums

VS Code, Unresolved References.

By mjdemaris

Hi all, I just started using VS Code to work with DB projects.  I...

Fun with JSON II

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Fun with JSON II

Changing Data Types

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Changing Data Types

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Question of the Day

Fun with JSON II

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 t1.[key] AS row,
       t2.*
FROM OPENJSON(
     (
         SELECT t.* FROM #test_data AS t FOR JSON PATH
     )
             ) t1
    CROSS APPLY OPENJSON(t1.value) t2;

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