SQL Server Myth on Clustered Index page allocation or B-Tree formation
Here is another SQL Server myth which I realised while understanding anatomy of index pages.
For a long time I...
2011-07-11
2,352 reads
Ramukar LivingForSQLServer
- Interests: Spending time with my family, Reading SQL Server internals and tuning topics
My Favourite SQL Server Myths and Realities
It has been more than two months since I blogged. I have been blogging in my Organization internal blogging site on Management...
2011-06-28
3,805 reads
Why knowledge of internals is required for DBA? here is a valid reason
I got a report from development team that section of BizTalk communicating with SQL Server to update status
is frequently...
2011-02-24
1,189 reads
Evaluating Performance of View and Stored procedure
I got a chance to evaluate performance of both views and stored procedure for high level decision making.
As all of Us knows that purpose/scope...
2011-02-13
11,571 reads
Examining PFS, GAM and SGAM pages
Anyone who can interpret data and index pages will surely think about interpreting PFS, GAM and SGAM pages. I am...
2011-02-13
5,607 reads
SQL Server Storage Internals Part 6 – How to read Clustered and Non Clustered Index Pages
In this article we are going to see how index pages are organized with data pages and how to read different...
2010-12-29
7,598 reads
SQL Server Storage Internals Part 5 - Properties of Clustered and Non Clustered Index pages
In this article, I thought of explaining different types and levels of index pages. but while start preparing for that, I realise...
2010-12-27
9,495 reads
SQL Server Storage Internals Part 4 - How to read a Heap page
I like to share 4 updates before moving on to this section:
1. I 've updated my profile to know more about...
2010-12-21
7,745 reads
SQL Server Storage Internals Part 3 - Architecture of Heaps
In this article I have explained below topics
1. key points on HEAP tables.
2. What happens when a table is created.
3. How to list...
2010-12-19
5,581 reads
SQL Server Storage Internals Part 2 - Partitions and Allocation Units
Before moving on to see anatomy of different types of pages, lets spend some time to understand
The relationship among sys.objects,...
2010-12-16
15,142 reads
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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
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