xp_cmdshell is an extended SQL stored proc that allows users to run Windows command prompt commands from within SQL. Sound scary? It might, but is xp_cmdshell really a security...
2023-04-26 (first published: 2023-04-12)
593 reads
SQL doesn’t really give us too many tools out of the box to allow us to spot when someone may be up to no good. We can look at...
2023-04-12 (first published: 2023-03-29)
570 reads
The question of encryption seems to be coming up a lot recently. I’ve had a number of people asking me about how to go about encrypting SQL Server. SQL...
2023-01-25 (first published: 2023-01-17)
464 reads
Here’s a quick one for today and is an issue that had me stumped for a while. It’s not one that I’d come across before and there isn’t really...
2022-11-28 (first published: 2022-11-16)
350 reads
This was an interesting question that I was asked yesterday and something that I’d never really thought of before. Can you delete the top x number of rows based...
2022-09-30 (first published: 2022-09-15)
1,004 reads
Have you ever had the need to attach a large number of database in one go? There’s no way to attach multiple databases in SSMS or via script, so...
2022-08-24 (first published: 2022-08-15)
323 reads
Sometimes I find remembering where a particular server sends its backups to a nightmare. You might have servers backing up to different locations, you might have different locations for...
2022-06-16
42 reads
Imagine that we’re seeing very heavy load on our SQL server, be it CPU or IO and we need to find out which database is the driver. I’m sure...
2022-05-11 (first published: 2022-05-03)
1,139 reads
I’m going to assume that most people will have at least heard of Brent Ozar’s brilliant First Responder Kit. If you haven’t then you’ve been missing out on some...
2022-02-09
117 reads
Spinlock contention is always a real headache to deal with. I recently saw an issue when spinlock contention on SOS_CACHESTORE was making the server virtually unresponsive. The issue was...
2021-11-15 (first published: 2021-11-03)
311 reads
By Brian Kelley
I developed these rules a while back, before COVID. I had a period of...
By Steve Jones
Someone asked why I would use TRY_PARSE after I posted a question at SQL...
My mugI grew up surrounded by coffee farms in Guatemala and somehow spent most...
I have a table that ends in ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]. I'm about to...
WA CS 082225313145 WWH2+WP2, Jl. Pangeran Diponegoro No.54, Tamanan, Kec. Tulungagung, Kabupaten Tulungagung, Jawa...
Comments posted to this topic are about the item OUTER APPLY Fundamentals: Part 2
I have this data in the OrderHeader table in a SQL Server 2025 database (ordered by CustomerID ASC):
orderid orderdate customerid complete 3 2025-05-10 00:00:00.0002 1 21 2024-01-10 00:00:00.0003 1 15 2023-10-28 00:00:00.0004 1 13 2025-03-08 00:00:00.0006 1 11 2024-04-02 00:00:00.0007 1If I run this query, how many rows are returned?
SELECT * from dbo.OrderHeader where customerid between 3 and '6'See possible answers