Solved

sql query to fetch previous rows value - 1 in the next column

Posted on 2011-03-07
11
782 Views
Last Modified: 2012-05-11
I have to create a loan account statement in the main report.
In the footnote I need to show the rate of interest changes during the period of account statement as below.

From_date       To_date                       Rate of Interest
1.4.2010          28.5.2010                 16.5%
29.5..2010        9.9.2010                 15.75
10.9.2010                                        16.,25


In the above report  'From_date' and 'ROI'   are fetched from the table.
Please help to fetch to_date with value=  next(from_date) -1
0
Comment
Question by:lkrishna
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
11 Comments
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 35059057
Are those dates stored as 'dates' or strings?

I'm also not sure what you mean by 'next(from_date)-1'

To add or subtract days from Oracle dates, just do it:

select to_date('1.4.2010','MM.DD.YYYY')-1 from dual;

0
 

Author Comment

by:lkrishna
ID: 35059200
The table has only from_date and ROI fields, I need to fetch the to_date

For e.g. in the below report, to_date in the first row is equal to from_date of second row - 1

29.5.2010 -1,

I tried with self join, connect by prior...but yet to get a solution

From_date       To_date                       Rate of Interest
1.4.2010          28.5.2010                 16.5%
29.5..2010        9.9.2010                 15.75
10.9.2010                                        16.,25
0
 
LVL 77

Accepted Solution

by:
slightwv (䄆 Netminder) earned 167 total points
ID: 35059252
See if this helps.

It gets easier to read if from_date is actually a date and not a varchar2 column.
drop table tab1 purge;
create table tab1 (from_date varchar2(20), ROI number);

insert into tab1 values('1.4.2010',16.5);
insert into tab1 values('29.5.2010',15.75);
insert into tab1 values('10.9.2010',16.25);
commit;

select from_date, to_char(
	to_date(
		lead(from_date) over(order by to_date(from_date,'DD.MM.YYYY'))
	,'DD.MM.YYYY')-1,'DD.MM.YYYY'),
	roi
from tab1;

Open in new window

0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 32

Assisted Solution

by:awking00
awking00 earned 167 total points
ID: 35060353
Not sure what you want as output, but see attached as general guideline.
query.txt
0
 
LVL 77

Expert Comment

by:slightwv (䄆 Netminder)
ID: 35060384
Isn't that pretty much what I posted?

>>The table has only from_date and ROI fields, I need to fetch the to_date

to_date isn't a real column.  It is derived as 1 - the 'next' from date.
0
 
LVL 35

Assisted Solution

by:James0628
James0628 earned 166 total points
ID: 35067914
In CR, you can use Next ({table.From_date}) to get the value from the next record, but you may need to add some restrictions to that.  For example, if the report is reading sets of records that are grouped/sorted by account, on the last record for one account, Next will give you the first From_date for the next account, which is presumably not what you'd want.  Then the question would be, what should "to date" be when there is no next record for an account?

 James
0
 

Author Comment

by:lkrishna
ID: 35308160
All the comments are useful and I was able to get the results successfully
0
 

Author Comment

by:lkrishna
ID: 35308167
all the expert comments are useful and I was able toget the required results.  Regret for not having responded ,  due to work pressure in the office   ,immediately could not respond.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Note: this article covers simple compression. Oracle introduced in version 11g release 2 a new feature called Advanced Compression which is not covered here. General principle of Oracle compression Oracle compression is a way of reducing the d…
Using SQL Scripts we can save all the SQL queries as files that we use very frequently on our database later point of time. This is one of the feature present under SQL Workshop in Oracle Application Express.
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 explains at a high level about the four available data types in Oracle and how dates can be manipulated by the user to get data into and out of the database.
Suggested Courses

631 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