Solved

SQL: select (x/y) as z

Posted on 2000-04-23
10
612 Views
Last Modified: 2010-04-04
I wish the following query to return z as a real (x/y), not as an integer (x div y) which it does.  x and y are integer values of the table.

select (x/y) as z from table.db
where y > 0

what to do?

bobby

0
Comment
Question by:rwv
  • 4
  • 2
  • 2
  • +2
10 Comments
 
LVL 15

Expert Comment

by:simonet
ID: 2743019
Try this:

select CAST((x/y) as FLOAT(10,3)) as z from table.db
where y > 0

I can't remeber the syntax correctly, so if FLOAT(10,3) fails, try NUMBER(10,3), REAL, etc.

Alex
0
 

Author Comment

by:rwv
ID: 2743932
Alex, that didn't work, result was still an integer (or at least truncated)

I tried this and it works:

select (x+0.0)/y as z from table.db

To get 2 decimal places, this works:
select((x+100)/y)/100.0

However, the results look like
10
9.5
9.25
9
...etc.

Is there an easy way to format with out using the fields editor?
0
 
LVL 3

Accepted Solution

by:
shenqw earned 100 total points
ID: 2743933
select cast((x) as float(10,3))/cast((y) as float(10,3)) as z from table.db
  where y>0
0
Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

 
LVL 15

Expert Comment

by:simonet
ID: 2744027
>Is there an easy way to format without
>using the fields editor?

I don't think so. Using the fields editor gives you a consistent format throughout the application (wherever that particular TField is being used).

IMO, the Fields Editor is the easiest way to do it for calculated fields.

Alex
0
 
LVL 3

Expert Comment

by:Stefaan
ID: 2746458
Hi,

Could you tell us which SQL Database you are using ?
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2746678
Why not just extract x and y as integers and then do the division (into a REAL) in your Delph code?

The Neil =:)
0
 

Author Comment

by:rwv
ID: 2747516
The Neil -
 I could do that, but then I would have to write the onDrawDataCell events for the dbgrid I want to display the results in, right?
0
 

Author Comment

by:rwv
ID: 2747526
Stefaan,
I'm using paradox tables.
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2747625
rwv,

Good point. Didn't realise that you were outputting to a visual component - oops

The Neil =:(
0
 

Author Comment

by:rwv
ID: 2747880
error above should read:

To get 2 decimal places, this works:
select((x*100)/y)/100.0

0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
PDF library for Delphi 2 119
calling procedure inside activexForm from secondform 1 248
calling Tcolordialog in dll make the form disappear 8 110
Delphi inherited method 6 67
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

816 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

15 Experts available now in Live!

Get 1:1 Help Now