Disabling SQL Server Optimizer Rules with QUERYRULEOFF
Daniel Farina shows how to disable the optimizer rules by using QUERYRULEOFF, an undocumented hint.
The Data Driven Event
In a couple of days, Microsoft is holding Data Driven, an event that will highlight SQL Server 2016.
SQL GROUP BY Basics
It sometimes pays to go back and look at what you think you already know about SQL. Joe Celko gives a quick revision of the GROUP BY and HAVING clauses in SQL that are the bedrock of any sort of analysis of data, and comes up with some nuggets that may not be entirely obvious.
Deep Dive into Changing Database Collation
Changing Database Collation Through Primary keys, Foreign Keys, Default and Check Constraints and more.
Testing times with SMO
SMO gives every appearance of being a great example of over-reliance on automated testing at the expense of manual exploratory testing.
Microsoft Data Driven SQL Server Event - Watch Live
Hear from Microsoft engineering experts on the latest features in SQL Server 2016 before the live event. Learn about new business intelligence capabilities like built-in mobile BI, fully integrated advanced analytics, security innovations, mission critical in-memory performance and new hybrid cloud solutions.
Performance Surprises and Assumptions : SET NOCOUNT ON
Aaron Bertrand (@AaronBertrand) revisits the impact that eliminating DONE_IN_PROC messages using SET NOCOUNT ON may or may not have on query performance
Data Science for SQL Folks: Leveraging SQL and R
Learn about how to build value driven analytics with SQL Server and R.
Spousal Surcharges
Today we have a guest editorial from Andy Warren that examines the costs of family at work.
Blogs
AI Helps Me with My Sloppiness
By Steve Jones
I type fairly well. Well, I type fast, but I do wear out a...
WITH clause gets a 26ai boost!
By way of background, a while back I did video called “My New Favourite...
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
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