Database Management
 
Forums: » Register « |  User CP |  Games |  Calendar |  Members |  FAQs |  Sitemap |  Support | 
User Name:
Password:
Remember me
Go Back   Dev Shed Forums > Databases > Database Management
Reload this Page

SQL Query

Discuss SQL Query in the Database Management forum on Dev Shed.
SQL Query Database Management forum discussing non-database specific SQL. Structured Query Language was designed to be a robust and standardized language for manipulating relational databases.

Reply
Add This Thread To:
  Del.icio.us   Digg   Google   Spurl   Blink   Furl   Simpy   Y! MyWeb 
« Previous Thread | Next Thread »  
Thread Tools Search this Thread Rate Thread Display Modes
 
Unread Dev Shed Forums Sponsor:
Get inside! Sample the range of functionality easily built with JMSL Library for Time Series Data Analysis, Heat Maps, Portfolio Optimization, Monte Carlo Simulation, Stock Price Charting and more. Download Now!
  #1  
Old September 16th, 2003, 11:47 PM
avataruy avataruy is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Sep 2003
Posts: 2 avataruy User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
Question SQL Query
Hi!

I have a Customers table with these fields:

CustomerID
CustomerName

I would like to know with a single query how many of my Customers are named John and how many are not.

It seems a very basic query to me but I can't figure it out without using temporary tables.

Regards,
Emmanuel
Reply With Quote
  #2  
Old September 17th, 2003, 01:57 AM
swampBoogie swampBoogie is offline
Contributing User
Dev Shed Intermediate (1500 - 1999 posts)
  
Join Date: Jan 2003
Location: Paris Uppland
Posts: 1,766 swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level)swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level)swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level)swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level)swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level)swampBoogie User rank is Sergeant Major (2000 - 5000 Reputation Level) 
Time spent in forums: 2 Weeks 4 Days 6 h 24 m 8 sec
Reputation Power: 37
Code:
select sum(case when customerName = 'John' then 1 else 0 end) as Johns,  sum(case when customerName = 'John' then 0 else 1 end) as nonJohns 
from customers
Reply With Quote
  #3  
Old September 17th, 2003, 08:04 AM
avataruy avataruy is offline
Junior Member
Dev Shed Newbie (0 - 499 posts)
  
Join Date: Sep 2003
Posts: 2 avataruy User rank is Just a Lowly Private (1 - 20 Reputation Level) 
Time spent in forums: < 1 sec
Reputation Power: 0
That did it!!!

Thanks a lot!!!

Emmanuel
Reply With Quote
Reply

Viewing: Dev Shed Forums > Databases > Database Management > SQL Query

« Previous Thread | Next Thread »

Thread Tools  Search this Thread 
Search this Thread:

Advanced Search
Display Modes  Rate This Thread 
Linear Mode Linear Mode
Rate This Thread:


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
View Your Warnings | New Posts | Latest News | Latest Threads | Shoutbox
Forum Jump


Forums: » Register « |  User CP |  Games |  Calendar |  Members |  FAQs |  Sitemap |  Support | 
  
 





© 2003-2008 by Developer Shed. All rights reserved. DS Cluster 2 hosted by Hostway.