Using Data Science And Machine Learning In Identifying Fraudulent Activities
A look at one way to detect fraud using R and a machine learning model.
2021-04-14
2,380 reads
siddharthray123
A Data Science Approach in Product Analytics
A significant part of product development is A/B testing. Simply put, this is where companies and product managers test to see a new version of their product versus the older one to make sure it’s worth publishing their features to the entire user base. In order to do this, an A/B test needs to be set […]
2020-04-20
3,014 reads
Blogs
Day 2 at PASS Data Community Summit 2024
By Steve Jones
I missed blogging yesterday as I was on stage/backstage for quite a bit of...
PASS Summit 2024 – Wednesday
By Brian Kelley
A common theme in the PASS Summits I've attended is community and that's definitely...
Taming Database Challenges: Insights from Redgate Keynote
By Chris Yates
I am excited to cover the Microsoft Keynote on Day 2: Redgate Keynote: Simplifying...
Forums
Deduplicating rows by choosing the row with the shortest string
Hello T-SQL experts I have a table containing team codes and descriptions. Unfortunately, many...
Unencrypted connections in Always on Availability Group
Hi, In my Always On Availability environment, I am seeing two encrypt_option values as...
Question of the Day
Using Outer Joins
I have this data in a SQL Server 2019 database:
Customer table CustomerID CustomerName 1 Steve 2 Andy 3 Brian 4 Allen 5 Devin 6 Sally OrderHeader table OrderID CustomerID OrderDate 1 1 2024-02-01 2 1 2024-03-01 3 3 2024-04-01 4 4 2024-05-01 6 4 2024-05-01 7 3 2024-06-07 8 2 2024-04-07I want a list of all customers and their order counts for a period of time, including zero orders. If I run this query, how many rows are returned?
SELECT c.CustomerName, COUNT(oh.OrderID) FROM dbo.Customer AS c LEFT JOIN dbo.OrderHeader AS oh ON oh.CustomerID = c.CustomerID WHERE oh.Orderdate > '2024/04/01' GROUP BY c.CustomerNameSee possible answers