SQL University Lesson 3 Page Compression
Lesson 2: Internal Structures, Vardecimal, & Row Compression
Welcome to Lesson 3 on Compression and welcome back Dear Reader. I want...
2011-10-17
1,078 reads
Lesson 2: Internal Structures, Vardecimal, & Row Compression
Welcome to Lesson 3 on Compression and welcome back Dear Reader. I want...
2011-10-17
1,078 reads
Hello Dear Reader! Welcome to the final day of the PASS Summit and the Keynote address by Dr. David J...
2011-10-14
466 reads
2011-08-09
2,070 reads
By Brian Kelley
I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...
EightKB is back again for 2026! The biggest online SQL Server internals conference is...
By HeyMo0sh
Working in DevOps long enough teaches you two universal truths: That’s exactly why I...
Hi all, I just started using VS Code to work with DB projects. I...
Comments posted to this topic are about the item Fun with JSON II
Comments posted to this topic are about the item Changing Data Types
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; See possible answers