I’m in a book! Data Professionals at Work
A while back a friend of mine, Malathi Mahadevan (b/t), asked me if I’d like to do an interview for...
2018-10-24
219 reads
Kenneth Fisher
Generate a random number of children for each parent
I was asked an interesting question the other day.
Is it possible to get a different random number of rows...
2018-10-17 (first published: 2018-10-03)
2,046 reads
What is the Object Explorer Details tab good for?
For a long time there I would see the Object Explorer Details tab show up when I opened SSMS (SQL...
2018-10-17
279 reads
Highlighting sp_spaceused
I’ve been using sp_spaceused a lot recently so I thought I would bring it up again. Basically it’s a quick...
2018-10-15
220 reads
Which is faster? IN (list) or IN (SELECT FROM Temp)
If you’ve done much with IN (list) then you’ve realized that it basically translates out to
col=val1 OR col=val2 OR...
2018-10-11
2,479 reads
Letting the business bully you: T-SQL Tuesday #107
Before I start anything I want go give a disclaimer. I absolutely believe that the business should be involved in...
2018-10-09
223 reads
Data Types Word Search
Just for fun here is a word search with all of the data types available in SQL Server. Well, two...
2018-10-05 (first published: 2018-09-26)
1,828 reads
SQL Homework – October 2018 – Time for an upgrade
When you created your home lab last September you probably installed a version of SQL 2016. Well, SQL 2017 was...
2018-10-01
305 reads
You can’t DELETE TOP (x) with an ORDER BY
Did you know you can’t do this?
DELETE TOP (10)
FROM SalesOrderDetail
ORDER BY SalesOrderID DESC;Msg 156, Level 15, State 1, Line 8
Incorrect...
2018-09-27 (first published: 2018-09-19)
3,198 reads
Escaping strings
No, I’m not talking about that nightmare everyone has where a bunch of strings are chasing you across a loom.
Not...
2018-09-24
888 reads
Blogs
Advice I Like: Fear and Imagination
By Steve Jones
Fear is fueled by a lack of imagination. The antidote to fear is not...
Cloud Data Driven User Group 2025 – Slides & Scripts
The slidedeck and the SQL scripts for the session Indexing for Dummies can be...
Leading Through Change: Guiding Teams in Times of Uncertainty
By Chris Yates
Change is not a disruption in technology; it is the rhythm. New frameworks appear,...
Forums
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...
Show/Hide number of rows in table
We have a report that has multiple tables that list the top 15 performers...
Replication from IBMi DB2 to MS SQL
We have a tool called DB Moto that reads journals (like t-logs) and replicates...
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