Solved

Calculating the Data in Oracle

Posted on 2011-09-27
11
329 Views
Last Modified: 2012-05-12
I had to calculate varience in oracle. I know there is a function in oracle named varience

I am doing VARIENCE as (MyExpectedData - MyActualReturns)

1. How Does Varience Work...

2. Alo I want to Return data as Percentage for one of the column which is a combination of two columns as:

(Column1/Column2)*100 as myNewData

But this does has errors, if there is a division by zero. It throws an error and second how do i bring its result in percentage sign with it

Please Guide

Thanks
0
Comment
  • 7
  • 4
11 Comments
 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36715069
For getting % symbol you can concatenate with % sign like :

select (((1/1)*100)||'%') percent_data from dual ;


>>> this does has errors, if there is a division by zero.

Can you provide some sample data so that we can check ?
0
 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36715082
For how variance work ... please find the link below :

http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions212.htm
0
 
LVL 16

Author Comment

by:Gurpreet Singh Randhawa
ID: 36715508
yes!

sample data like this


select
column1, column2,
(column1/column2 * 100) as column3
from my table

So this is how i am getting the data, But please also tell if there is a divison by zero then how we do handle it
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36715655
Please find the example as :

create  temp_t (col1 number , col2 number);

begin
insert into temp_t values (1,1);
insert into temp_t values (1,0);
end;

commit;

Error Query:

SQL> select (((col1/col2)* 100 )||'%') data_percent from temp_t ;

Valid Query:

SQL> select  ((CASE WHEN (NVL(max(col2),0) = 0) THEN 0 ELSE ( col1/col2)* 100 END)||'%') percent  
  from temp_t
group by col1,col2;
0
 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36715700
you can remove the max from the valid query ......
0
 
LVL 16

Accepted Solution

by:
Swadhin Ray earned 500 total points
ID: 36715723
Valid Query:

SQL> select  ((CASE WHEN (NVL(col2,0) = 0) THEN 0 ELSE ( col1/col2)* 100 END)||'%') percent  
  from temp_t
group by col1,col2;
0
 
LVL 16

Author Comment

by:Gurpreet Singh Randhawa
ID: 36716031
why using groupby
0
 
LVL 16

Author Comment

by:Gurpreet Singh Randhawa
ID: 36716047
also if omit group it will display correct data rt, also does it handles the decimal places also
0
 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36716057
...you can remove group by  condition...
0
 
LVL 16

Author Comment

by:Gurpreet Singh Randhawa
ID: 36716118
also will decilams play good
0
 
LVL 16

Expert Comment

by:Swadhin Ray
ID: 36716218
just try it and let us know if you get any issues
0

Featured Post

Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

Question has a verified solution.

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

Suggested Solutions

This post first appeared at Oracleinaction  (http://oracleinaction.com/undo-and-redo-in-oracle/)by Anju Garg (Myself). I  will demonstrate that undo for DML’s is stored both in undo tablespace and online redo logs. Then, we will analyze the reaso…
Entering a date in Microsoft Access can be tricky. A typo can cause month and day to be shuffled, entering the day only causes an error, as does entering, say, day 31 in June. This article shows how an inputmask supported by code can help the user a…
This video explains at a high level with the mandatory Oracle Memory processes are as well as touching on some of the more common optional ones.
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

839 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