Optional Parameters Causing Index Scans
Optional parameters in a stored procedure often lead to scans in the execution plan, reading through the entire table, even...
2014-04-15
729 reads
Optional parameters in a stored procedure often lead to scans in the execution plan, reading through the entire table, even...
2014-04-15
729 reads
Many people see CXPACKET at the top of their waits and start trying to fix it. I know this topic’s...
2014-03-11
1,613 reads
My company cut the training budget this year, and it’s not that uncommon for that to happen anymore. However, I’m...
2014-03-04
1,080 reads
DBAs are the gatekeepers, but if we make it an unpleasant process then people will find a way around the...
2014-02-13
476 reads
Chances are you have extra information in the buffer pool for a bad query and it’s dragging down your PLE,...
2014-01-08
2,005 reads
First, lets understand what the types of indexes are. If you take a reference book, you have the two types...
2013-11-20
1,676 reads
I started a new job a month ago, but didn’t want to just figure things out as they came to...
2013-10-08
840 reads
Fires, SAN failures, tornados, and car accidents all came up today, yet it was a very good day at work. ...
2013-10-04 (first published: 2013-09-30)
2,163 reads
Here’s my full presentation for SQL Saturday #250 in Pittsburgh this past Saturday along with some notes on what I...
2013-09-20
948 reads
Trending database and table sizes helps give you an idea of what to expect, and, sometimes, points out problems and...
2013-09-11 (first published: 2013-09-10)
4,089 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