When the optimizer doesn’t estimate the correct amount of memory for a query, either memory is wasted that could be used for other processes or some operations will spill to disk. Microsoft has added Memory Grant Feedback to help overcome this issue. In this article, Greg Larsen explains what you need to know about this new feature.
Many of us have worked in environments that have a number of SQL Server instances. Different versions, editions, and mostly different hardware profiles. We deal with different applications and software that places different demands and requirements on our database systems. Some of us are even dealing with multiple datastores, trying to integrate SQL Server with […]
Nearly 1000 database professionals took part in this year's State of Database Monitoring survey. Providing insights into how they monitor their estates, the technologies they work with, what their biggest challenges are, and emerging trends for 2020. For the detailed analysis of the responses, download your free copy of the report.
n SQL cursors serve as a pointer that enables application programming language to deal with query results one row at a time. Read on to explores the concept behind and learn how to declare cursors, open, retrieve data from them, and then close them.
I've worked in a a couple very high performing organizations that adapted to changing conditions and built software well. I've worked in more poorly performing organizations that struggled to release updates and patches, causing tremendous stress for the IT staff. DevOps is designed to help improve our software delivery and quality, if you work on […]
In some shops, testing is entirely in the realm of quality analysts. In this article, Julio Sampaio argues that testing should be automated and start with the developers.
We’re pleased to announce that the SQL Prompt extension for Azure Data Studio is now available to download for free. With SQL Prompt in Azure Data Studio, you can use an extensive collection of code snippets to write your SQL code quickly and efficiently. You can also keep your code consistent using the powerful formatting capability, and customize the applied style to suit your preferences.
Let the data drive your decisions. This has been something of a mantra for many technical people, and even many business people, across the last twenty or so years. The allure of business intelligence is harnessing lots of data to make decisions that are rooted in some rational analysis of what has happened. Many companies […]
Coming from a SQL developer background these few inner workings of Entity Framework caught me by surprise.
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The DBCC CHECKIDENT command is used when working with identity values. I have a table with 10 rows in it that looks like this:
TravelLogID CityID StartDate EndDate 1 1 2025-01-11 2025-01-16 2 2 2025-01-11 2025-01-16 3 3 2025-01-11 2025-01-16 4 4 2025-01-11 2025-01-16 5 5 2025-01-11 2025-01-16 6 6 2025-01-11 2025-01-16 7 7 2025-01-11 2025-01-16 8 8 2025-01-11 2025-01-16 9 9 2025-01-11 2025-01-16 10 10 2025-01-11 2025-01-16The docs for DBCC CHECKIDENT say this if I run with only the table parameter: "If the current identity value for a table is less than the maximum identity value stored in the identity column, it is reset using the maximum value in the identity column. " I run this code:
DELETE dbo.TravelLog WHERE TravelLogID >= 9
GO
DBCC CHECKIDENT(TravelLog, RESEED)
GO
INSERT dbo.TravelLog
(
CityID,
StartDate,
EndDate
)
VALUES
(4, '2025-09-14', '2025-09-17')
GO
What is the identity value for the new row inserted by the insert statement above? See possible answers