Upgrade PostgreSQL 9.X to 12.X in Windows
Learn how you can upgrade a PostgreSQL server and ensure your databases follow to the new version.
2021-02-09
40,314 reads
Learn how you can upgrade a PostgreSQL server and ensure your databases follow to the new version.
2021-02-09
40,314 reads
This article covers how to install PostgreSQL on the macOS.
2020-11-19
3,348 reads
Introduction to PostgreSQL PostgreSQL is a free and general purpose open source object-relational database system that uses and extends the SQL language. Though originally designed to run on UNIX platforms, PostgreSQL is eligible to run on various platforms such as Linux, macOS, Solaris, and Windows. PostgreSQL databases provide enterprise-class database solutions and are used by […]
2020-09-28
6,487 reads
By Chris Yates
I’m thrilled to be covering the Microsoft Keynote: Fuel AI Innovation with Azure Databases on Day...
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Comments posted to this topic are about the item What's New for the Microsoft...
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