Query Performance Tuning with Filtered Statistics
Introduction I recently got a call from our DBA telling me that the CPU usage is hitting 100% on the DB server and the ETL process runs for more...
2019-09-04 (first published: 2019-08-26)
687 reads
Blog Posts
Query Store stores dates as UTC
One of the powerful aspects of Query Store is the ability to directly query the DMVs for details of historical executions and performance. A key view for this is...
2019-09-04 (first published: 2019-08-21)
313 reads
Quick Blog: Clone Power BI Workspace Permissions
However, one detail they left out of that post is how to clone the users & groups, and their respective permissions from one Workspace to another. It's a pretty...
2019-09-04
48 reads
Quick Blog: Clone Power BI Workspace Permissions
However, one detail they left out of that post is how to clone the users & groups, and their respective permissions from one Workspace to another. It's a pretty...
2019-09-04
6 reads
SQL in the City Streamed is Today
Today is SQL in the City Streamed!!! Only three of us, , as Kendra has other commitments. Still, it’s exciting for Kathi, Grant, and myself to be presenting the...
2019-09-04
19 reads
Use of SQL server statistics and how to make a query to use them
Statistics are very important in the query...
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2019-09-04
200 reads
What SQL Server Performance & Management Tools Do I Use?
Several times I’ve been asked what tools are in my performance tuning and SQL Server management arsenal, so I decided to just create this blog to list them out...
2019-09-04
438 reads
When were the statistics last updated and how many rows were sampled?
TL;DR; Final query is at the bottom. Every now and again (particularly when someone is having performance problems) I’ll get ... Continue reading
2019-09-04
200 reads
Working with SQL Server Data Files
Most people connect to a database, create tables, run update statements, tune queries, add indexes, and never once think about the underlying data and log files that support all...
2019-09-04
6 reads
Working with SQL Server Data Files
Most people connect to a database, create tables, run update statements, tune queries, add indexes, and never once think about the underlying data and log files that support all...
2019-09-04
207 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