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Amazon EC2 | Creating a Connection to an Amazon RDS Instance

In a previous article, we showed how to expose an Amazon RDS instance to the public internet securely for direct access to the database. In this article we shall configure an Amazon EC2 instance for network access to an existing Amazon RDS instance. The purpose of this would be to make sure that if we deploy an application to this EC2 instance, communication from the client to the RDS instance would be smooth.

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Webinar | Database Monitoring: The ROI of Build vs. Buy

There are many things to consider when deciding whether to invest in a database monitoring tool or whether to use a homegrown solution. However, the business frequently wants to know one thing and one thing only: what’s the return on this investment (ROI)? In this webinar, Microsoft Data Platform MVP, Grant Fritchey, is joined by our expert panel to share the pros and cons to building a monitoring system versus purchasing one.

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By Steve Jones - SSC Editor

Comments posted to this topic are about the item What's New for the Microsoft...

Using Outer Joins

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Using Outer Joins

Closest to ProcDate

By boehnc

Not sure I have this 2nd left join correct. I need to grab the...

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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          2024-04-07
I 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.CustomerName

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