T-SQL Tuesday #36 – Community
Chris Yates (@YatesSQL / blog) is hosting the T-SQL Tuesday blogging party this month, and he wants to know “What does...
2012-11-13
732 reads
A Discussion of SQL Server-Related Topics
Does a Clustered Index really physically store the rows in key order?
The Myth
One misconception that I see a lot deals with how data is stored in a clustered index. Specifically – is...
2012-10-21
8,149 reads
Dealing with orphaned users
The Scenario:
You just restored a production database on a development server. You’ve told the developers that it’s restored, and you...
2012-10-03
2,717 reads
Dealing with negative session ids
Hello? Mr. DBA? Have you got a moment?
So there you are, enjoying one of the few quiet moments of your...
2012-08-15
5,305 reads
What’s been happening in Wayne’s World
Late last year, my life got strange. Well, it’s always been strange, so let’s just say it became stranger than...
2012-07-18
747 reads
I’m speaking at the PASS Summit 2012
The PASS Summit 2012 schedule has been released, and I’m proud to announce that I’ve been selected to present a...
2012-06-25
684 reads
Interview questions
Lately, I’ve been asked by several folks about the interview questions that I use when I interview candidates for SQL...
2012-06-15 (first published: 2012-06-11)
11,973 reads
ORM Tools
ORM tools. They’re great. They’re evil.
In the right hands, used the proper way, they can be a very powerful, very...
2012-06-11
3,489 reads
SQL Server 2012 Performance Test: Gap Detection
Next up on the SQL Server 2012 Performance testing circuit: Gap Detection. You know, where you find missing values from...
2012-04-19
3,291 reads
T-SQL Tuesday #029 – Useful Feature of SQL Server 2012
This month, T-SQL Tuesday is being hosted by Nigel Sammy. Since the RTM of SQL Server 2012 just occurred, he...
2012-04-10
1,618 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