TempDB Excessive Memory Usage Example
I see TempDB using more memory than I feel it should and found a way to resolve it. Previously I dove into technical details and questioning what I saw...
2016-02-01
20 reads
I see TempDB using more memory than I feel it should and found a way to resolve it. Previously I dove into technical details and questioning what I saw...
2016-02-01
20 reads
It’s easy to query XEvents to see some of the basic info in deadlocks, including the system_health session which is...
2016-01-27 (first published: 2016-01-25)
2,913 reads
All bloggers started as beginners. We picked things up, learned them, and got to the point where we wanted to...
2016-01-26
572 reads
All bloggers started as beginners. We picked things up, learned them, and got to the point where we wanted to start sharing our knowledge. The problem is that most...
2016-01-26
6 reads
It’s easy to query XEvents to see some of the basic info in deadlocks, including the system_health session which is already capturing this information by default. This script will,...
2016-01-25
83 reads
Normal DBAs will sum up shrinking a database data file in one word: NO!
I’ll talk to you about this subject because...
2016-01-19
1,698 reads
Normal DBAs will sum up shrinking a database data file in one word: NO! I’ll talk to you about this subject because I’m not normal. Still, my goal is that...
2016-01-19
30 reads
On February 6, 2016, Cleveland is hosting a free training event for SQL Server. This has a lot of the...
2016-01-11
532 reads
On February 6, 2016, Cleveland is hosting a free training event for SQL Server. This has a lot of the great stuff from the big, paid events, and skips...
2016-01-11
8 reads
I found a bug where I’m seeing TempDB use more memory than it should on multiple versions of SQL Server,...
2016-01-08 (first published: 2016-01-05)
3,357 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