The Axis Of Evil
Views, table variables and local variables are great in terms of programming principles.
But In terms of performance, they can be...
2013-03-25 (first published: 2013-03-20)
2,801 reads
Views, table variables and local variables are great in terms of programming principles.
But In terms of performance, they can be...
2013-03-25 (first published: 2013-03-20)
2,801 reads
One of the most fundamental DMF’s a SQL Server DBA should know is sys.dm_exec_query_plan.
This Dynamic Management Function allows us to see...
2013-03-19 (first published: 2013-03-12)
2,792 reads
Assuming you’ve been on earth lately, you probably heard the terms “Big Data”, “Hadoop”, “NoSQL” and so on.
Companies want to...
2013-03-05
555 reads
About two weeks ago, I wrote about SQL Server Podcasts and why I love that medium so much.
Today, I want...
2013-02-26
1,046 reads
Two weeks ago I delivered a presentation called “Things You Can Find In The Plan Cache” to the israeli SQL Server...
2013-02-18
483 reads
Photo credit: Digitalnative
About a year ago, I came across an online deal for a car stereo system with a USB...
2013-02-14
1,566 reads
I read this awesome post by Joe Sack, titled “Detecting Cardinality Estimate Issues with sys.dm_exec_query_stats”.
I was amazed by the beauty...
2013-01-31
1,880 reads
Usually, a database is meant to serve some kind of application, and .Net applications have a few possible ways to query...
2013-01-09
1,175 reads
SQL Server 2012 is best known for its bombastic new features: AlwaysOn, Columnstore indexes, Window functions enhancements, Extended Events enhancements,...
2012-09-30
1,115 reads
24 Hours of Pass is tomorrow. If you haven’t registered yet, now is a good time.
I expect to:
Have little to no...
2012-09-19
525 reads
By James Serra
I’m honored to be hosting T-SQL Tuesday — edition #192. For those who may...
By Vinay Thakur
Continuing from Day 2 , we learned introduction on Generative AI and Agentic AI,...
Quite the title, so let me set the stage first. You have an Azure...
hi everyone I am not sure how to write the query that will produce...
Comments posted to this topic are about the item Rollback vs. Roll Forward
Comments posted to this topic are about the item Foreign Keys - Foes or...
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