asked on 1/19/2020

Finding Customers who made a purchase and customer who did not make a purchase

Hello EE,

Can someone please help me with a SQL code to get a list of customers who purchased at least 1 item in a giving month and customers who did not make a purchase in that same month? I want to show 1 for customers who made a purchase and 0 for customers who did not make a purchase. I have 2 tables - a customer table and an order table. The customer table contains all the customers while the order table contains only the customer who made a purchase in any giving month. In my case, I want to show customers who made a purchase in the month of January 2020 customers who did not.

Both tables have the customer as an identifier while the orders table contains customerno, ordercount, and orderdate

SQL

Last Comment

fb1990

1/20/2020

David Todd

1/19/2020

Hi

Does this work for you?

use AdventureWorks2017
go

select 
	c.CustomerID
	, count( h.SalesOrderID )
from sales.Customer c
left outer join sales.SalesOrderHeader h
	on h.CustomerID = c.CustomerID
	and h.OrderDate >= '2012-01-01'
	and h.OrderDate < '2012-02-01'
group by
	c.CustomerID
having 
	count( h.SalesOrderID ) > 0
;

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hth
David

fb1990

1/19/2020

ASKER

Thank you for your assistance. I did not see where this is referencing the customer table. I need to represent customers in the order table who made a purchase with 1 and customers who did not make a purchase, but on the customer table with a 0 in the result

ASKER CERTIFIED SOLUTION

Ryan Chong

1/20/2020

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fb1990

1/20/2020

ASKER

Thank you very much, Ryan. The solution is very helpful!