Subject Re: [firebird-support] Re: SubQuery Help
Author Martijn Tonies (Upscene Productions)
Post date 2014-09-16T16:16:50Z
I think this needs a
 
GROUP BY a.Project_PK
 
With regards,

Martijn Tonies
Upscene Productions
http://www.upscene.com

Download Database Workbench for Oracle, MS SQL Server, Sybase SQL
Anywhere, MySQL, InterBase, NexusDB and Firebird!
 
 
Sent: Tuesday, September 16, 2014 6:12 PM
Subject: [firebird-support] Re: SubQuery Help
 


I'd recommend using a left join with table alias.
 
Example
 
Select
  a.Project_PK
, SUM(b.cost) AS Sum_of_Cost
, SUM(b.estimate_cost) AS Sum_of_Estimated_Cost
, SUM(c.quantity) AS Sum_of_Quantity
, SUM(c.estimate_quantity) AS Sum_of_Estimated_Quantity
FROM Projects a
LEFT JOIN Cost b ON a.project_pk = b.project_pk
LEFT JOIN Quantity c ON a.project_pk = c.project_pk
 
--
Dixon Epperson