SQL Advanced Select

Posted on 2013-01-02
Medium Priority
Last Modified: 2013-01-02
trying to identify orders that contain a specific product (but only purchased with another product)

There are other fields in each table but are irrelevant for this example

Sample Data:

master table
order_no | order_date | customer_id | amount

100 | 2013-01-01 | 500 | 20.00
101 | 2013-01-01 | 502 | 22.00
102 | 2013-01-01 | 504 | 21.00
103 | 2013-01-01 | 505 | 22.00

order_details table
orderdetails_id | order_no | product_desc

1 | 100 | prod1
2 | 100 | prod2
3 | 100 | prod3
4 | 101 | prod2
5 | 102 | prod1
6 | 103 | prod3
7 | 103 | prod2

I would like to get all records and the amount of products that contain prod2 (which was ONLY purchased with another product)

Expected results:

order_no | prod_count
100 | 3
103 | 2
Question by:xtreme109
  • 2
LVL 66

Assisted Solution

by:Jim Horn
Jim Horn earned 450 total points
ID: 38736850
Give this a whirl (air code, so modify to suit your needs)..

SELECT od.order_no, Count(od.product_desc) as details_count
FROM order_details od
   JOIN (SELECT DISTINCT order_no FROM order_details WHERE product_desc <> 'prod2') odc ON od.order_no = odc.order_no
WHERE product_desc = 'prod2'
GROUP BY order_no

The idea here is that you're JOINing on a table that has everything but prod2's, so if there is no prod2 in an order, the JOIN will not display the record.
LVL 13

Accepted Solution

Ryan earned 1050 total points
ID: 38736851
I'm not seeing that Master is needed at all?

SELECT Order_No, Count(*) As Prod_Count
FROM Order_Details
WHERE Order_No IN (SELECT Order_No FROM Order_Details WHERE Product_Desc ='prod2')
HAVING Count(*)>1
LVL 13

Expert Comment

ID: 38737031
Curious, to better my answers in the future, why was my solution given a B? I presume you only had to copy paste it?

Author Comment

ID: 38737145
I didnt realize that. sorry! The default grade was a 'b' shouldve been an A

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