First Impressions
SELECT @@Version
Microsoft SQL Server “Denali” (CTP1) – 11.0.1103.9 (X64)
I’ve been playing with the CTP for a few days (with absolutely no...
2010-11-09
1,427 reads
Gail Shaw
- Interests: Computer Graphics, Aikido, Roleplaying
A Trio of Table Variables
So, it’s the second Tuesday of the month again, and it’s time for T-SQL Tuesday again. This month it’s hosted...
2010-10-12
1,262 reads
One wide index or multiple narrow indexes?
Or “If one index is good, surely many indexes (indexes? indices? indi?) will be better”
This is a question that comes...
2010-09-14
1,575 reads
Come and gone
Or “Plan cache monitoring – insert and remove”
Previously I took a look at the CacheHit and CacheMiss events to see how...
2010-08-31
1,813 reads
Hit and miss
Or “Monitoring plan cache usage”
For people interested in the details of how SQL is using and reusing execution plans, there...
2010-07-27
1,131 reads
Does a missing data file send a database suspect?
Short answer: No
I keep seeing this come up on various forums when people ask what makes a database go suspect...
2010-06-29
2,035 reads
DBA Hell
On the first day of DBA hell, the server gave to me
A database with damaged system tables and no good...
2010-06-15
963 reads
In, Exists and join – a roundup
Over the last several months I’ve had a look at IN, Exists, Join and their opposites to see how they...
2010-04-27
1,342 reads
Left outer join vs NOT EXISTS
And to wrap up the miniseries on IN, EXISTS and JOIN, a look at NOT EXISTS and LEFT OUTER JOIN...
2010-03-23
12,504 reads
The Root of all Evil
Or “Shot gun query tuning”
There have been a fair few forums questions in recent months asking for help in removing...
2010-03-11
438 reads
Blogs
In-Person CISA Training – April 13-16, 2026
By Brian Kelley
I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...
EightKB 2026
EightKB is back again for 2026! The biggest online SQL Server internals conference is...
The FinOps Lifecycle: From Budgeting to Reporting
By HeyMo0sh
Working in DevOps long enough teaches you two universal truths: That’s exactly why I...
Forums
Fun with JSON II
Comments posted to this topic are about the item Fun with JSON II
Changing Data Types
Comments posted to this topic are about the item Changing Data Types
Answering Questions On Dropped Columns
Comments posted to this topic are about the item Answering Questions On Dropped Columns
Question of the Day
Fun with JSON II
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 t1.[key] AS row,
t2.*
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t1
CROSS APPLY OPENJSON(t1.value) t2; See possible answers