In this article, I wanted to discuss the PowerShell (PoSh) pipeline, which was confusing to me at first and took some time to get used to working with. I had used one in Linux before, but the PoSh one is more powerful, but also slightly different. Hopefully I can demystify some of the concepts for […]
2026-01-07 (first published: 2020-12-31)
6,191 reads
In this next article, we look at how notebooks using Python can be cheaper than Spark notebooks.
2026-01-07
2,453 reads
When there’s a performance emergency, a lot of us perform the same manual tasks over and over. We run sp_BlitzWho or sp_WhoIsActive, look for blocking, long-running or out-of-control queries, and kill them.
2026-01-07
See how Claude Code helped load a lot of messy data into a database for less than $5.
2026-01-05
2,577 reads
Sometimes we cannot improve query performance because we don’t have control over the code. Consider a query that is generated by Entity Framework (EF) from the application and you do not have access to the source code. The main question is how you can improve SQL Server query optimization for a poorly performing query?
2026-01-05
In this article, I will provide a set of examples to show case the use of OUTPUT clause for INSERT and DELETE statements.
2026-01-02 (first published: 2017-05-25)
307,654 reads
This article covers the 10 key concepts developers should understand to avoid surprises and to use the model database intentionally.
2026-01-02
In this article, I am going to explain fixing a problem related login failure error with SQL Server. The Problem One of the common error in the SQL Server error log is "Login failed for user 'DomainName\ServerName$'. Reason: Could not find a login matching the name provided. [CLIENT: <local machine>]". Even though it says that […]
2025-12-31 (first published: 2020-11-24)
54,414 reads
Just like advances in artificial intelligence, I have heard that quantum computing is going to be a disruptive technology for our future. For instance, there’s the concern that it’s going to break/crack a lot of network encryption and potentially data encryption. What’s going to be affected, how long do we have, and what do I (and my organization) need to do to prepare for it?
2025-12-31
Learn about the new ZSTD compression algorithm in SQL Server 2025.
2025-12-29
2,035 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