SQL Server: Part 4 : Approaching Database Server Performance Issue
In the last three parts, we have discussed about different queries that can be used to list the current state...
2012-09-26
1,737 reads
PracticalSQLDba
SQL Server: Part 3 : Approaching Database Server Performance Issue
In the last post, we have discussed the script to list the sessions which are waiting for resource or currently...
2012-09-24
1,155 reads
SQL Server: Part 2 : Approaching Database Server Performance Issues
In the Part 1, we have seen how quickly we can check the runnable task and I/O pending task on...
2012-09-28 (first published: 2012-09-21)
3,777 reads
SQL Server: Part 1 : Approaching Database Server Performance Issues
When you work as DBA, many people will approach you with a complaint like "Application is taking ages to load...
2012-09-18
1,396 reads
How to Connect PerfMon to a Remote Server ?
Till now, we do not have any third party tool to monitor the SQL server, but we have implemented many custom...
2012-09-17
4,955 reads
SQL Server: String Pattern Matching
It is common scenario that, we might need to extract the data from the SQL server based on some pattern....
2012-09-13
11,668 reads
SQL Server: Understanding GAM and SGAM Pages
We know that SQL server stores the data in 8 KB pages. An extent is made up of 8 physically contiguous...
2012-09-12
26,561 reads
SQL Server : Usage of OVER Clause
Over clause can be used in association with aggregate function and ranking function. The over clause determine the partitioning and...
2012-09-17 (first published: 2012-09-10)
10,438 reads
SQL Server:Output Clause
Couple of days back, one of my colleague came to me asking for help. He is inserting multiple record from a...
2012-09-09
1,491 reads
SQL Server:Understanding the Data Record Structure
In our last post, we have gone through the data page structure and we have noticed that there is an...
2012-08-22
7,215 reads
Blogs
SQL Saturday Boston Slides and Code
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Thanks to everyone who attended my sessions today at SQL Saturday Boston 2025. I’ve...
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Forums
How to use data pre-computed in previous ETL SSIS Nodes?
I'm building ETL packages in SSIS. My data comes from an OLE DB Source...
Building AI Governance and Policies- First Steps
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Simple delete causes table scan on other tables with foreign key
Why is sql doing a full scan VS seeking on the index? I've included...
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