Credit Card Number Validation Escalar Function
Evaluate credit card numbers based on ISO 2894 algorithm.
2010-03-24 (first published: 2010-03-17)
1,918 reads
T-SQL
An Urgent Ad Hoc Report
In this new article, Yakov Shlafman shows us how he wrote a quick ad hoc report of expenses so that he could leave on time one day.
2010-03-17
8,128 reads
T-SQL: Why “It Depends”
Why does everyone use "it depends" as an answer to many T-SQL questions? Bob Hovious brings us a short example of how performance can change based on data loads for the same code.
2010-03-16
13,253 reads
2010-03-11
4,747 reads
2010-03-09
4,366 reads
Procedural, Semi-Procedural and Declarative Programming in SQL
A lot of the time, the key to making SQL databases perform well is to take a break from the keyboard and rethink the way of approaching the problem; and rethinking in terms of a set-based declarative approach. Joe takes a simple discussion abut a problem with a UDF to illustrate the point that ingrained procedural reflexes can often prevent us from seeing simpler set-based techniques.
2010-03-09
3,459 reads
2010-03-08
4,670 reads
2010-03-02
4,067 reads
Randomizing Result Sets with NEWID
Seth Delconte brings us a technique to solve a common request. Using the NEWID function to return a random record from a result set.
2010-03-01
7,384 reads
2010-02-22
3,835 reads
Blogs
AI: Blog a Day – Day 4: Transformers – Encoder, Decoder, and Attention
By Vinay Thakur
Continuing from Day 3 where we covered LLM models open/closed and their parameters, Today...
Flyway Tips: Multiple Projects
By Steve Jones
One of the nice things about Flyway Desktop is that it helps you manage...
What DevOps Look Like in Microsoft Fabric
By HeyMo0sh
Microsoft Fabric (not to be confused with the more general term “fabric” in DevOps)...
Forums
Can an Azure App Service Managed Identity be used for SQL Login?
I'm fairly certain I know the answer to this from digging into it yesterday,...
Azure Synapse database refresh
Hi Team, I am trying to refresh the Azure Synapse Dedicated pool from production...
how to write this query?
hi everyone I am not sure how to write the query that will produce...
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