Jason Carter has spent most of his career as a .NET developer, with time spent as a development manager, accidental DBA, and most recently a full-time DBA. Having worked with large databases as a developer, he found great interest in tuning, tweaking, and making databases run faster. With the support of his wife, he gave up his managerial duties, jumped the development ship and dove head first into his new career as a Database Administrator.

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Fun with JSON II

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Changing Data Types

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Answering Questions On Dropped Columns

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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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