Basu Hullur


SQLServerCentral Article

Updating AS/400 Linked Server Tables from SQL Server

One of the strongest features of SQL Server is the ability to connect to disparate data sources and perform queries across multiple sources. New author Basu Hullur brings us a technique that he used to update data on the AS/400 in a much quicker way than previously.

5 (1)

You rated this post out of 5. Change rating

2007-09-22 (first published: )

44,116 reads

Blogs

T-SQL Tuesday #180: Good enough is perfect

By

How can you achieve good enough without compromising the process/product? In the world of...

How to Convert FileTime to DateTime

By

One of my customers recently wanted to rename each of the SQL audit files...

The pros and cons of self-service BI: What every industry leader should know

By

The post The pros and cons of self-service BI: What every industry leader should...

Read the latest Blogs

Forums

What's New for the Microsoft Data Platform

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...

Visit the forum

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

See possible answers