11 years of PASS Summit
This is a story of my 11-year association with PASS, and the many ways it helped me grow as a...
2016-09-23
421 reads
Mala Mahadevan
Why SQL Cruise?
I was riding the elevator up from lunch today, at work. I am relatively new at my job and do...
2016-09-23
480 reads
Statistics with TSQL and R: Chi Square Test
As I move on from descriptive and largely univariate (one variable based) analysis of data into more multivariate data – one...
2016-09-21 (first published: 2016-09-13)
4,566 reads
Budgeting for SQL Saturdays
We’ve been doing SQLSaturdays for eight years at Louisville now. We’ve had a quite a wide range of budgets depending on...
2016-09-13
591 reads
Statistics with T-SQL and R – the Pearson’s Correlation Coefficient
In this post I will attempt to explore calculation of a very basic statistic based on linear relationship between two...
2016-09-08 (first published: 2016-09-05)
3,195 reads
Calculating odds ratio with T-SQL and R
Simple steps towards understanding what is an Odds Ratio, and how do we arrive at it using TSQL and R scripts.
2016-08-30
2,524 reads
Script for creating test data for odds ratio
Make sure you have a working version of SQL Server 2016.
USE [master]
GO
/****** Object: Database [WorldHealth] ******/
CREATE DATABASE [WorldHealth]
CONTAINMENT = NONE
ON PRIMARY
(...
2016-08-16
398 reads
TSQL Tuesday #081 – Sharpening something
This TSQL tuesday is hosted by my good friend Jason Brimhall – Jason has put forth a creative challenge – plan to...
2016-08-10
293 reads
Descriptive Statistics with SQL and R – II
In the previous post I looked into some very basic and common measures of descriptive statistics – mean, median and mode,...
2016-07-24
606 reads
Script to create demo database and load data for statistics and R
Make sure you have a working install of SQL Server 2016. The size of the database is only 8 MB.
USE...
2016-07-15
287 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