Performance on readable replicas in Availability Groups
I apologize in advance if I mess up the terminology.
I’ve worked with a moderate read workload on a readable replica...
2019-02-08
776 reads
Dynamic Data Masking in the execution plan
I think Dynamic Data Masking is pretty cool. The idea is basically to provide a mask for certain users when...
2019-02-07
818 reads
Bad indexing can show up in wait statistics
At first, this statement might sound a bit confusing. Usually, we expect wait statistics to show us what a query...
2019-02-06
222 reads
Two T-SQL features that I appreciate
We occasionally get cool improvements in T-SQL in newer versions of SQL Server. Here’s a short post on some of...
2019-02-05
190 reads
A brief introduction for bcp
I end up using the bcp utility to move tables between environments, and I’ve found that a lot of the...
2019-02-04 (first published: 2019-01-16)
3,179 reads
SQL Server Monitoring: Keeping track of missing index requests
A lot of us turn to execution plans when we see a slow running query, and it’s not uncommon to...
2019-02-04
195 reads
SQL Server Monitoring: What queries should you monitor?
I previously wrote about measuring wait statistics. This matters a lot, because you can track historically what wait statistics are...
2019-02-02
370 reads
How many plans are in the plan cache for a stored procedure?
It depends on where you’re looking and how many statements are in the stored procedure.
Let’s take a look at some...
2019-01-31
541 reads
Memory Grants part 3: How much memory can one query get?
When you build a brand new shiny SQL Server, you want to get a lot of memory so your queries...
2019-01-31 (first published: 2019-01-18)
2,934 reads
Query tuning: The IN clause
This post will cover the IN clause and another way to rewrite the same logic. I don’t intend to say...
2019-01-29
2,645 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...
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