Poor Little Misunderstood Views
Some people love ‘em, some people hate ‘em. But, one thing I have found to be nearly universal is that...
2010-07-29
59,914 reads
Implicit Data Conversion: The "HHidden" Bottleneck
Have you ever written a query that just seems to take forever? You have looked it over time and time...
2010-07-13
976 reads
WHERE to begin
Many people, once they start getting comfortable writing SQL, begin asking the same questions. One such common question is “Does...
2010-07-07
1,303 reads
Indexes are best utilized in WHERE, not JOIN
A pervasive oversight in database indexing by newer database users is relying solely on indexes used for joining tables together...
2010-07-01
3,736 reads
Function Calls are Evil Incarnate
The following queries look extremely innocent. However, they are all application killers once the target table grows to more than...
2010-06-28
1,352 reads
My SELECT statement has hung!
One of the first roadblocks many developers run into when using SQL Server for the first time is firing off...
2010-06-24
2,578 reads
The Power of Indexes
Time and time again I have run into the scenario where a developer who is moving into using databases is...
2010-06-22
710 reads
Killer I/O
Here’s a big statement
WHEN WRITING DATABASE QUERIES, 95% OF THE TIME THE BOTTLENECK IS IN THE I/O, not the CPU,...
2010-06-10
967 reads
A Guitar is Just a Piece of Wood
In my real-life I play guitar. Being an analytical sort-of-fella I found myself inhaling all the books, videos, advice, etc....
2010-06-08
660 reads
The Nature of the Database-Driven Developer
Bear with me as I wax philosophical for two sentences. Our societies are becoming more polarized with each passing day. ...
2010-06-03
681 reads
Blogs
AI: Blog a Day – Day 5: Notebooks, Hugging face models and Fine Tuning
By Vinay Thakur
Continuing from Day 4 where we learned Encoder, Decoder, and Attention Mechanism, today we...
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...
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