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scottw1988
Starting Member

4 Posts

Posted - 2012-04-14 : 13:30:18

Hello all, I need some help with my homework.

The question:

List all suppliers (animals and merchandise) who sold us items in June. Identify whether they sold us animals or merchandise.

I can do the first part of the question. But the second part, Identify whether they sold us animals or merchandise is throwing me for a loop. Any hints or suggestions anyone can offer would be much appreciated.

Here is my query so far:

SELECT S.NAME
FROM SUPPLIER S INNER JOIN ANIMALORDER AO ON S.SUPPLIERID = AO.SUPPLIERID
INNER JOIN MERCHANDISEORDER MO ON S.SUPPLIERID = MO.SUPPLIERID
WHERE MONTH(AO.ORDERDATE) = 6 OR MONTH(MO.ORDERDATE) = 6

The website that uses the same database ERD and questions we are using in my class are located at this URL.
http://jerrypost.com/DBMS/Exercises/Ch05DBExercises.html
The question this post pertains to is number 19.

Thanks,
Scott

Scott Williamson

scottw1988
Starting Member

4 Posts

Posted - 2012-04-14 : 13:33:00

Oh an by the way, we have an output format we have to follow. That is why so far I have only selected the name for the output.

Our output should look like this:

Name | Type of Sale

I am having trouble identifying the type of sale. How would one go about doing this?

Scott Williamson

scottw1988
Starting Member

4 Posts

Posted - 2012-04-14 : 15:33:42

Figured it out. Posting the Solution so maybe others can benefit.

USE PET
SELECT S.NAME, 'ANIMAL' AS [Type of Sale]
FROM SUPPLIER S INNER JOIN ANIMALORDER AO ON S.SUPPLIERID = AO.SUPPLIERID
WHERE MONTH(AO.ORDERDATE) = 6

UNION

SELECT S.NAME, 'MERCHANDISE' AS [Type of Sale]
FROM SUPPLIER S INNER JOIN MERCHANDISEORDER MO ON S.SUPPLIERID = MO.SUPPLIERID
WHERE MONTH(MO.ORDERDATE) = 6

Scott Williamson

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-04-15 : 13:20:39

you can also use


SELECT	S.NAME, CASE WHEN COUNT(AO.SUPPLIERID)> 0 THEN 'ANIMAL' WHEN COUNT(MO.SUPPLIERID)> 0 THEN 'MERCHANDISE' END AS [Type of Sale]
FROM	SUPPLIER S 
LEFT JOIN ANIMALORDER AO 
ON S.SUPPLIERID = AO.SUPPLIERID
AND	MONTH(AO.ORDERDATE) = 6
LEFT JOIN MERCHANDISEORDER MO 
ON S.SUPPLIERID = MO.SUPPLIERID
AND MONTH(MO.ORDERDATE) = 6
GROUP BY S.NAME

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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