2010-04-27
3,737 reads
T-SQL
Index Fragmentation Status (includes Partitioned Tables/Indexes)
This script reveals the state of your indexes. It breaks down the indexes where they are partitioned, matching the index to it’s partition and filegroup.
2010-12-16 (first published: 2010-04-22)
7,535 reads
2010-04-22
3,892 reads
Basic Defensive Database Programming Techniques
We can all recognize good-quality database code: It doesn't break with every change in the server's configuration, or on upgrade. It isn't affected by concurrent usage, or high workload. In an extract from his forthcoming book, Alex explains just how to go about producing resilient TSQL code that works, and carries on working.
2010-04-22
5,476 reads
SQL Server Ranking Functions
A new article from Wayne Sheffield that examines the ranking functions in SQL Server. Learn how you can use ROW_NUMBER(), NTILE(), RANK(), and DENSE_RANK() in your applications.
2010-04-20
14,835 reads
2010-04-19
3,644 reads
2010-04-14
3,667 reads
2010-04-13
4,443 reads
2010-04-12
4,498 reads
2010-04-06
3,336 reads
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Question of the Day
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