Grant Fritchey

Grant Fritchey is a SQL Server MVP with over 20 years’ experience in IT including time spent in support and development. Grant has worked with SQL Server since version 6.0 back in 1995. He has developed in VB, VB.Net, C# and Java. Grant has authored books for Apress and Simple-Talk, and joined Red Gate as a Product Advocate in January 2011. Find Grant on Twitter @GFritchey or on his blog as the Scary DBA.

SQLServerCentral Editorial

Sources of Inspiration

I honestly enjoy writing editorials. Something pops into my tiny brain next to something else, and I'm off. However, today, as I started to write on the topic of learning, I suddenly felt like I had just written this same editorial. I go and look, sure enough, several of my recent editorials have been on […]

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2023-03-12 (first published: )

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Blog Post

Query Store Data Cleanup

Microsoft supplies quite a few knobs to control how Query Store performs data cleanup. You can set your cleanup various ways, and, they interact. Let’s talk about how and...

2023-02-22 (first published: )

264 reads

SQLServerCentral Editorial

Constant Learning

Yesterday, I had the opportunity, and the privilege, to attend an all-day workshop put on by Bob Ward teaching all about SQL Server 2022 (you can take this too, Bob is presenting it at SQLSaturday Austin and SQL Bits, and there will be more). It was a great day. Bob is an excellent teacher. Even […]

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2023-02-11

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SQLServerCentral Editorial

Learning Leads To Learning

I am an amateur radio operator. In the US this is commonly referred to as a ham, or a ham radio operator. My call sign is KC1KCE, as issued by the US government through the FCC. And yeah, I can hear you now, a ham is the geek equivalent of a cross-fitter. How do you […]

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2023-01-20 (first published: )

146 reads

Blogs

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Question of the Day

The Read Committed Snapshot Isolation behaviour

I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON:

use master;
go

alter database AdventureWorks set read_committed_snapshot on with no_wait;
go
Then, from Session 1, I execute the following code:
--Session 1
use AdventureWorks;
go

create table ##t1 (id int, f1 varchar(10));
go

insert into ##t1 values (1, 'A');
From another session, called Session 2, I open a transaction and execute the following update:
--Session 2
use AdventureWorks;
go

begin tran;
update ##t1 
set f1 = 'B'
where id = 1;
Now, going back to Session 1, what happens if I execute this statement?
--Session 1
select f1
from ##t1
where id = 1;
 

See possible answers