The need for performance tuning your SQL Server workloads has never been more critical. As workloads are moved into cloud services, their efficiency has a direct impact on the recurring bills. A workload that consumes more resources than necessary costs more to host in the cloud and affects the bottom line for your organization.
2023-04-07
10,935 reads
Previously we covered Part 1: Indexing for the WHERE Clause, and then we covered ORDER BY. Today, let’s tackle joins.
2020-03-20
I’m teaching my Mastering Index Tuning pre-con at SQLBits and SQL Saturday Iceland, and part of the prerequisites is that you’re already familiar with my How to Think Like the Engine class and my Fundamentals of Index Tuning class. To make that easier, I’m running the Fundamentals of Index Tuning class this week on the blog.
2020-03-13
I’m teaching my Mastering Index Tuning pre-con at SQLBits and SQL Saturday Iceland, and part of the prerequisites is that you’re already familiar with my How to Think Like the Engine class and my Fundamentals of Index Tuning class.
2020-03-12
By Chris Yates
Change is not a disruption in technology; it is the rhythm. New frameworks appear,...
No Scooby-Doo story is complete without footprints leading to a hidden passage. In SQL...
By James Serra
A bunch of new features for Microsoft Fabric were announced at the Microsoft Fabric Community...
Comments posted to this topic are about the item Don't Forget About Financial Skills
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Comments posted to this topic are about the item Checking Identities
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