Three SQL Server MVPs, and stalwarts of the SQLServerCentral and MSDN community forums, provide fascinating insight into the most common SQL Server problems, why they occur, and how they can be diagnosed using tools such as Performance Monitor, Dynamic Management Views and server-side tracing. The focus is on practical solutions for removing root causes of these problems, rather than "papering over the cracks".
2014-11-11
25,914 reads
Learn how to use SQLCLR to get file system information instead of using xp_cmdshell on your SQL Servers.
2013-11-22 (first published: 2009-02-05)
34,937 reads
As discussed in my previous Getting Started with SQL Server Event Notifications article, SQL Server Event Notifications allow us to capture and handle events that occur inside the SQL Server database engine. Event Notifications execute for DDL Events and Trace Events and we can use to capture information about the event that fired, and automate […]
2012-11-06
9,064 reads
The aim of the new Database Recovery Advisor in SQL Server 2012 is to simplify the task of piecing together a recovery sequence from multiple backup files, comprising full, differential, and log backups. In this article, I'll demonstrate how the tool makes it easier to plan for, and perform, a point in time recovery from a series of backups, in order to recover data that may have been lost due to an application bug, or user error.
2012-07-13
2,637 reads
Occasionally, a DBA may need to restore a database from a multiple backup files that originated from multiple servers. This requirement might arise, for example, in a database-mirroring configuration, where backups may be from either of the servers.
2012-06-27
2,950 reads
Learn how SQLCLR can be used to replace BCP and xp_cmdshell to export data to comma separated and tab delimited flat files.
2011-05-06 (first published: 2009-03-03)
19,797 reads
Learn why ALTER DATABASE should be preferred over Detach/Attach for moving database files on the same SQL Server from MVP Jonathan Kehayias.
2010-09-24 (first published: 2009-05-27)
31,695 reads
MVP Jonathan Kehayias brings us a short article on how to troubleshoot deadlocks in SQL Server.
2010-06-04 (first published: 2009-02-02)
42,156 reads
Learn the basics of Event Notifications from MVP Jonathan Kehayia. This article will show you how to create customized responses to events in SQL Server 2005/2008.
2009-12-22
24,849 reads
Learn how to create a certificate signed stored procedure to solve common permissions problems using sp_send_dbmail. MVP Jonathan Kehayias brings us a short tutorial that discusses your options and code to show you how to implement certificate security.
2009-12-17
10,558 reads
By HeyMo0sh
Over time, I’ve realised that one of the hardest parts of cloud management isn’t...
By HeyMo0sh
One of the biggest challenges I’ve faced in cloud operations is maintaining clear visibility...
By Steve Jones
I come to Heathrow often. Today is likely somewhere close to 60 trips to...
Comments posted to this topic are about the item Fun with JSON II
Comments posted to this topic are about the item Changing Data Types
Comments posted to this topic are about the item Answering Questions On Dropped Columns
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