Getting a query plan
Query plans are an essential tool when doing performance tuning. When looking at a query plan you should be aware...
2014-02-19
1,484 reads
Kenneth Fisher
T-SQL Tuesday #51: Doubledown disaster
Jason Brimhall is hosting the 51st T-SQL Tuesday this month with “Place your bets!.
It’s always a gamble when buying a...
2014-02-14 (first published: 2014-02-11)
1,579 reads
Transactions: What commands aren’t allowed?
Transactions are great tools that every DBA and developer should learn how to use. Unfortunately not everything can be put...
2014-02-13 (first published: 2014-02-05)
4,554 reads
Check your SQL Agent history settings before it’s too late!
A little while back I was doing some research into a failed job and ran into a slight problem. The...
2014-02-10
895 reads
Negative session_ids
I probably had the most fun all week when a query I was running came up blocked. Sounds strange right?...
2014-02-03 (first published: 2014-01-27)
2,171 reads
Transactions: Creating a single restore point across multiple databases.
This is a disaster and recovery trick I’ve found to be useful for developers with batch processes that hit multiple...
2014-02-02
1,362 reads
Using sys.dm_exec_sql_text() to figure out blocking is sometimes flawed.
I frequently rely on joining sys.dm_exec_requests and sys.dm_exec_sql_text() to know what queries are running on a system and when I...
2014-01-29
1,181 reads
Transactions: Who, What and Where
Recently we had a scenario where we had a handful of queries being blocked. Nothing unusual there but when I...
2014-01-23 (first published: 2014-01-20)
3,295 reads
The “most_recent_sql_handle” column
While researching my last post I ran across an interesting column I hadn’t noticed before, sys.dm_exec_connections.most_recent_sql_handle. I mentioned it in...
2014-01-22
1,080 reads
Guid vs Identity columns (Ints)
I came across an interesting question on SE last week. Guid vs INT – Which is better as a primary key?...
2014-01-20 (first published: 2014-01-13)
4,749 reads
Blogs
What DevOps Look Like in Microsoft Fabric
By HeyMo0sh
Microsoft Fabric (not to be confused with the more general term “fabric” in DevOps)...
T-SQL Tuesday #192: What career risks have you taken?
By James Serra
I’m honored to be hosting T-SQL Tuesday — edition #192. For those who may...
AI: Blog a Day – Day 3: LLM Models – Open Source vs Closed Source
By Vinay Thakur
Continuing from Day 2 , we learned introduction on Generative AI and Agentic AI,...
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