Solved

SQL calculate a percentage

Posted on 2013-01-22
4
249 Views
Last Modified: 2013-01-22
In this query I'm trying to do a percent calcuation but for some reason anything less than 100% is not being calculated.

SELECT #tmp_ALLORDERS_COUNTS.TOTAL_ORDERS_COUNT, CAST(((#tmp_IVPROTOCOL_COUNTS.IVPROTOCOL_ORDERS_COUNT/#tmp_ALLORDERS_COUNTS.TOTAL_ORDERS_COUNT)*100) as decimal(18,2)) AS PERCENTAGE_USE
	, #tmp_IVPROTOCOL_COUNTS.* FROM  #tmp_ALLORDERS_COUNTS, #tmp_IVPROTOCOL_COUNTS
	WHERE  #tmp_ALLORDERS_COUNTS.DRUG_CODE = #tmp_IVPROTOCOL_COUNTS.DRUG_CODE

Open in new window


results look like this:
percentagecalcsql
0
Comment
Question by:ghettocounselor
  • 2
  • 2
4 Comments
 
LVL 34

Accepted Solution

by:
johnsone earned 500 total points
ID: 38807482
It is most likely an issue of data types.  I would cast each individual variable:

CAST(CAST(#tmp_IVPROTOCOL_COUNTS.IVPROTOCOL_ORDERS_COUNT as decimal(18,2))/CAST(#tmp_ALLORDERS_COUNTS.TOTAL_ORDERS_COUNT as decimal(18,2))*100.0) as decimal(18,2))

It is doing integer math and then doing the cast.  You need to do the cast first.
0
 

Author Comment

by:ghettocounselor
ID: 38807963
Needed to wrap with a few more parens but idea was sound. THANKS!

(CAST(CAST(#tmp_IVPROTOCOL_COUNTS.IVPROTOCOL_ORDERS_COUNT as decimal(18,2))/(CAST(#tmp_ALLORDERS_COUNTS.TOTAL_ORDERS_COUNT as decimal (18,2))) as decimal (18,2))*100) AS PERCENTAGE_USE
0
 

Author Closing Comment

by:ghettocounselor
ID: 38807966
As always appreciate quick response!
0
 
LVL 34

Expert Comment

by:johnsone
ID: 38808056
Sorry about the missing parens.  I didn't try it.  It looked like they were all there.  But, you got the idea.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
This article describes how to use the timestamp of existing data in a database to allow Tableau to calculate the prior work day instead of relying on case statements or if statements to calculate the days of the week.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

948 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now