2026-02-23
963 reads
Foreign Keys (FK)
2023-12-27
485 reads
2023-10-27
437 reads
2023-10-20
459 reads
2018-08-27
857 reads
2018-06-05
872 reads
2016-08-16
1,342 reads
2016-08-02
1,371 reads
2016-07-05 (first published: 2016-05-26)
4,847 reads
Trust, or Verify – How FKs Can (or Cannot) Help Performance
Learn how trusted foreign keys (FK) can help or hurt performance.
2018-08-24 (first published: 2016-03-08)
6,836 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