nested case for arithmetic operators
Hi,
I've been having troubles with MySQL dataflow trying to write a code basically doing something like this:
(CASE WHEN week = 1 THEN (a/b) END)  (c/d) * e
i tried writing it down like this:
(CASE WHEN `Week` = "1" THEN SUM((CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN(`8Q_Price`*`Tons`) END))
/ SUM((CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END)) END)  (CASE when week = 1 THEN (a/b) END) 

(SUM((CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN(`8Q_Price`*`Tons`) END))
/ SUM((CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END))) (c/d)
*
SUM((CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END)) e
I am not having syntax errors with this code but I keep on getting wrong answers even if I change the groupings. Can you guys recommend something?
Thanks!
p.s. a colleague of mine recommended to use a CREATE FUNCTION statement, will it work in our MySQL Dataflow?
Best Answer

Hey drewfig,
No worries. I moved some of the parentheses around so this should work for what you described above.
((SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `8Q_Price`*`Tons` END)
/
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `Tons` END))  (CASE when week = 1 THEN (a/b) END) 

(SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `8Q_Price`*`Tons` END)
/ SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END))) (c/d)
*
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END) eHope this helps,
Brian
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.0
Answers

Hello Drewfig,
Based on the order of operations, you want your algorithm to divide a and b then divide c and d then multiply the results of c/d by e and then subtract the results of (a/b) and (c/d*e).
(SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `8Q_Price`*`Tons` END)
/
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `Tons` END))  (CASE when week = 1 THEN (a/b) END) 

((SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `8Q_Price`*`Tons` END)
/ SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END)) (c/d)
*
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END)) eThe above will work for what you described in your post.
Hope this helps,
Brian
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.1 
Hey Brian,
Thanks for taking time to check on my question. actually what we wanted to do is to subtract the results of (a/b) and (c/d) and then the result of the subtraction will be multiplied by e.
It will be like ((a/b)  (c/d)) * e.
I apologize for the confusion yesterday. can you help revising the code? thanks!
0 
Hey drewfig,
No worries. I moved some of the parentheses around so this should work for what you described above.
((SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `8Q_Price`*`Tons` END)
/
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" and `Week` = "1" THEN `Tons` END))  (CASE when week = 1 THEN (a/b) END) 

(SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `8Q_Price`*`Tons` END)
/ SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END))) (c/d)
*
SUM(CASE WHEN `8Q` = "POR" AND `Fiscal_Year` = "FY19" THEN `Tons` END) eHope this helps,
Brian
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.
**Please mark "Accept as Solution" if this post solves your problem
**Say "Thanks" by clicking the "heart" in the post that helped you.0
Categories
 All Categories
 1.6K Product Ideas
 1.6K Ideas Exchange
 1.5K Connect
 1.2K Connectors
 288 Workbench
 4 Cloud Amplifier
 7 Federated
 2.8K Transform
 94 SQL DataFlows
 593 Datasets
 2.1K Magic ETL
 3.6K Visualize
 2.4K Charting
 667 Beast Mode
 42 App Studio
 34 Variables
 644 Automate
 165 Apps
 434 APIs & Domo Developer
 42 Workflows
 3 DomoAI
 31 Predict
 12 Jupyter Workspaces
 19 R & Python Tiles
 378 Distribute
 107 Domo Everywhere
 266 Scheduled Reports
 5 Software Integrations
 109 Manage
 106 Governance & Security
 8 Domo University
 23 Product Releases
 Community Forums
 39 Getting Started
 29 Community Member Introductions
 95 Community Announcements
 4.8K Archive