Intelligent Query Processing FAQ
Joe Sack answers a number of questions about intelligent query processing in SQL Server: You have batch mode adaptive joins, but no row mode adaptive joins. Why?Adaptive joins are...
2019-04-15
Database Performance
Does ARITHABORT Setting Negatively Impact SQL Server Performance? – Interview Question of the Week #220
Question: Does ARITHABORT Setting Negatively Impact SQL Server Performance?
First appeared on Does ARITHABORT Setting Negatively Impact SQL Server Performance? – Interview Question of the Week #220
2019-04-14
Finding Froid’s Limits: Testing Inlined User-Defined Functions
This week, I’ve been writing about how SQL Server 2019’s bringing a few new features to mitigate parameter sniffing, but they’re more complex than they appear at first glance:...
2019-04-11
Parameter Sniffing in SQL Server 2019: Adaptive Joins
So far, I’ve talked about how adaptive memory grants both help and worsen parameter sniffing, and how the new air_quote_actual plans don’t accurately show what happened. But so far,...
2019-04-10
Parameter Sniffing in SQL Server 2019: Air_Quote_Actual Plans
My last post talked about how parameter sniffing caused 3 problems for a query, and how SQL Server 2019 fixes one of them – kinda – with adaptive memory...
2019-04-09
Selects That Cause Writes
Answer Time While answering a question on dba.se, I got to thinking about if there would be a good way…
2019-04-09
Parameter Sniffing in SQL Server 2019: Adaptive Memory Grants
This week, I’m demoing SQL Server 2019 features that I’m really excited about, and they all center around a theme we all know and love: parameter sniffing. If you...
2019-04-08
Stop Looking At Wait Stats Without Looking At Uptime
Economy Of Waits There’s a joke about two economists walking down the street. One of them asks the other how…
2019-04-08
Scalar function inlining in SQL Server 2019
This insanely cool new performance-related update is one of nicest features in SQL Server 2019, and certainly one I’ve been looking forward to for a long time. If you’ve...
2019-04-08
Blogs
Ten Years of PowerShell
Ten years ago, I published a post about filming a Pluralsight Play by Play...
T-SQL Tuesday #202: 100 Hours
By Steve Jones
It’s time for T-SQL Tuesday again and this is a great prompt to start...
T-SQL Tuesday
By alevyinroc
T-SQL Tuesday is a monthly blog party hosted by a different community member each...
Forums
Databricks Genie Spaces for SQL Analysts: Natural Language Querying Without Leaving Your Data Platform
Comments posted to this topic are about the item Databricks Genie Spaces for SQL...
The Costs of Multiple Platforms
Comments posted to this topic are about the item The Costs of Multiple Platforms
RegEx Functions II
Comments posted to this topic are about the item RegEx Functions II
Question of the Day
RegEx Functions II
I have this data in a table in a SQL Server 2025 database:
EmailAddressID EmailAddress 7 dylan0@ADVENTURE-WORKS.COM 8 Diane1@ADVENTURE-WORKS.COMIf I run this query, which row(s) are returned?
SELECT top 10 * FROM person.EmailAddress WHERE REGEXP_LIKE(EmailAddress, '^d') AND BusinessEntityID IN (7,8)See possible answers