Barriers to Virtualization
Virtualization, and use of the 'cloud', will be essential to the deployment of new applications, but will existing applications will be quite so amenable?
2009-06-15
290 reads
Tony Davis
- Interests: football, modern literature, real ale
The Real SQL Server Experts
T-SQL is not a language to be admired from a distance for its grace, sophistication and integrity. It is a tool designed to allow "normal" developers and DBAs to build database business applications as smoothly and efficiently as possible.
2009-05-25
381 reads
Method to the Madness
Instead of piling on more, often increasingly complex, tools, Tony believes what is needed is a clear roadmap and methodology for systematically addressing SQL Server Performance issues.
2009-05-20
166 reads
Staring you in the Face
Tools expand, some might say bloat, at an alarming rate and it's often the case that, in amongst all the clutter, the most valuable features somehow elude us.
2009-05-18
100 reads
The Next Frontier of Performance Troubleshooting
The number of tools for troubleshooting SQL Server performance problems has recently expanded at a dizzying rate. Is the latest one any reason to get excited?
2009-05-04
583 reads
The Disappearing DBA
During a "difficult period", a developer often sinks from view. When things are going well, suddenly they are the gunslinger, the hotshot. The DBA often looks on wistfully. For him, the "fame trajectory" seems to work in reverse.
2009-04-06
1,130 reads
Do DBAs Still Read Technical Books?
Despite my misgivings about the fall from favor of technology books, I was heartened to hear from the developers at Red Gate that the classic books on the art of programming are still important to them. What are the equivalent books for DBAs?
2009-03-23
451 reads
Guest Editorial: Short Transactions
It is ingrained in many developers and DBAs to keep transactions in SQL Server "as short as possible". Why does this mindset exist? Does it imply a deep-seated lack of confidence in the scalability of SQL Server's locking and concurrency models?
2009-03-18
182 reads
Instrumenting Code - Database Weekly (Feb 23, 2009)
In the Oracle world, great importance is attached to "instrumenting" your application code. However, it seems not to be an issue that is much discussed in SQL Server. Tony Davis wonders why...
2009-02-23
516 reads
Guest editorial: Reasons to be Cheerful
The furore surrounding the recent release of MySQL 5.1 makes Tony Davis wonder if more than a few web 2.0 developers might be peering over the SQL Server Express fence and wondering if the grass doesn't look slightly greener over here.
2009-02-04
196 reads
Blogs
AI Helps Me with My Sloppiness
By Steve Jones
I type fairly well. Well, I type fast, but I do wear out a...
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
Question of the Day
Getting the Average
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers