Time to Revive our YouTube Channel
It’s been forgotten about and neglected for few years but I’ve decided to dust off the cobwebs and revive our YouTube channel. Keep an eye on it, every new...
2025-07-11
12 reads
Why Not Just Use VARCHAR(MAX)?
A while ago I was looking into some odd errors that were cropping up in an application, when I spotted that all the columns in a table were defined...
2025-06-30
35 reads
Distributed Availability Group Dashboard
The Distributed Availability Group Dashboard can be downloaded from our GitHub repo. https://github.com/SQLUndercover/UndercoverToolbox/blob/master/DAG%20Dashboard.pbix. This comes off of the back of my last post looking at using a distributed availability...
2025-04-14 (first published: 2025-04-01)
310 reads
SQL Server Migration Using a Distributed Availability Group
SQL Server migrations are a headache, ask anyone who’s been through the pain of moving a reasonably large server and I’m sure they will agree. There are all sorts...
2025-02-19 (first published: 2025-02-05)
845 reads
Explicitly Defining Values in an IN Clause VS Putting Them into a Temp Table and Use a Semi-Join
This post comes off the back of my last, where I looked at issues caused by explicitly declaring a large number of values in an IN clause. The query...
2024-12-11 (first published: 2024-12-04)
898 reads
The query processor ran out of internal resources and could not produce a query plan – When You’ve Managed to Confuse SQL With a Crazy IN Clause.
Recently I received a cry for help over Teams. The issue was that an application was throwing up the following SQL error, The query processor ran out of internal...
2024-11-13 (first published: 2024-10-30)
728 reads
Rebuilding a SQL Server Database Transaction Log
“Could you help me, we deleted the database’s transaction log file and now that database is stuck in ‘Recovery Pending’?” This was a panicked call that I received a...
2024-10-14 (first published: 2024-09-26)
515 reads
Undercover Catalogue 0.4.5 Released – Database Module Bug Fix
Full documentation on the Undercover Catalogue can be found HERE We’ve spotted a bug in the Databases module where an unprintable ASCII character was being inserted at the beginning of...
2024-09-12
38 reads
Backup SQL Server to AWS S3 Bucket (2022 Update)
Way back in the mists of time I wrote a post on how to backup SQL server to an S3 bucket using TNTDrive, https://sqlundercover.com/2018/06/18/backup-your-on-premise-sql-server-directly-to-an-aws-s3-bucket/. Back then, if we wanted...
2024-08-26 (first published: 2024-08-13)
240 reads
Are Your Secondary Availability Group Read Only Replicas Falling Behind? Are You Seeing PARALLEL_REDO_TRAN_TURN Waits?
Are you struggling with a laggy redo and a build up in the redo queue on your readonly secondaries? Are you suffering with high PARALLEL_REDO_TRAN_TURN waits? Then this magic...
2024-07-31 (first published: 2024-07-17)
314 reads
Blogs
Azure Networking: Designing for Change
By John
Failing to plan is planning to fail. When organizations first begin implementing Azure networking,...
Using Customer Docker Compose File Names
By Steve Jones
As I use containers more and more to run various things, I decided I...
SQL Server Failover Cluster Instances
By Kevin3NF
Old Reliable Still Matters If you’ve been around SQL Server for a while, you’ve...
Forums
SQL Server authentication vs. Trusted connection
I maintain an application written years ago, where the database is on a Windows...
Handling Engagement Rings & Wedding Band
I’m working on a jewelry e-commerce project and need advice on designing an efficient...
The Duplicate Cursor
Comments posted to this topic are about the item The Duplicate Cursor
Question of the Day
The Duplicate Cursor
Can I run this code:
DECLARE ANewTable CURSOR FOR SELECT * FROM ANewTableSee possible answers