Win a copy of Node.js Design Patterns: Design and implement production-grade Node.js applications using proven patterns and techniques this week in the Server-Side JavaScript and NodeJS forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Ron McLeod
  • Rob Spoor
  • Tim Cooke
  • Junilu Lacar
Sheriffs:
  • Henry Wong
  • Liutauras Vilda
  • Jeanne Boyarsky
Saloon Keepers:
  • Jesse Silverman
  • Tim Holloway
  • Stephan van Hulst
  • Tim Moores
  • Carey Brown
Bartenders:
  • Al Hobbs
  • Mikalai Zaikin
  • Piet Souris

LEFT JOIN problem. 2 tables, include null

 
Ranch Hand
Posts: 755
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi guys,
I believe this is a left join question (though I�m not 100% sure)
I have a table with the info below. Some data is not included in the second table but I still want the user to know about it. Can anyone tell what is the sql command for that?
Thanks


Table Target: ID, date, startDate, endDate, growth

Example:
101, 2006-01-01, 2006-12-31, 30
102 2006-01-01, 2006-12-31, 15

Table Production: ID, amount, date
101, 800, 2006-01-02
101, 900, 2006-02-03
101, 150, 2006-03-15
//no info on 102

I would like to get the following data:

ID, total_production
101, 1850, 30
102, null, 15
 
Ranch Hand
Posts: 333
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You're right it's an OUTER JOIN problem (left or right, depending on how you order your query). To complicate it, you've got a SUM across ID for one the tables. Not too hard, but challenging enough to be interesting.

I tend to use the Oracle non-standard syntax for these, which is:



I'm too brain-fried this evening to work out the standard syntax; if you need that, the above should give you a running start...
 
Ranch Hand
Posts: 809
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You can go for this syntax....

 
Peter Primrose
Ranch Hand
Posts: 755
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Stu & Naseem,
thanks a lot, I played around using the basis you gave me and solved the problem.
thanks for the tip
 
Any sufficiently advanced technology will be used as a cat toy. And this tiny ad contains a very small cat:
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop
https://coderanch.com/wiki/718759/books/Building-World-Backyard-Paul-Wheaton
reply
    Bookmark Topic Watch Topic
  • New Topic