Reduce the Cost Year by Year

Question

1.00/5 (1 vote)

See more:

Dear Friends,

I want to calculate the vehicle cost, reducing the 10% every year.
How to derive this in query, enclosed the sample query

Select '2010'=600000,'2011'=600000-(600000*10)/100,'2012'=540000-(540000*10)/100,'2013'=486000-(486000*10)/100

Posted 18-Feb-15 20:06pm

Arunprasath Natarajan

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

/\jmot · Answer 1 · 2015-02-18T20:44:00

We know the Formula of compound interest in P(1-r/100)^n<br />
so, just implement this in SQl.

Like this.

SQL

declare @P as decimal(18,2)
declare @rate as decimal(18,2)
declare @Yr as int
set @p=60000 --initial amount
set @rate=10 --rate of reduce 10%
set @Yr=2010-- starting year is 2010

declare @passYr as int
set @passYr=2011 -- calculating for the year of 2011

declare @res as decimal(18,2)
set @res=0
-- we know the formula of compound interest is p(1-r/100)^n

declare @pw as int
declare @yrD as int
set @yrD=@passYr-@Yr

set @pw=0
while @pw<@yrD -- loop for ^n year 
begin
set @res=(1-@rate/100)
set @pw=@pw+1
End

select (@P*@res)

You can just Use Power instead of While Loop .
See Ref.
https://msdn.microsoft.com/en-us/library/ms174276.aspx[^]

Umer Akram · Answer 2 · 2015-02-18T21:14:00

you can use the following way to accomplish the given scenario.

this one is a reducing balance logic for each year. so if you give a range of the year to calculate the result you can use the following:

SQL

Declare @startYear int = 2000
		, @endYear int = 2010
		, @amt as int = 60000
		, @RunningTotal as int = 0;

DECLARE @t TABLE
(
  TID INT PRIMARY KEY,  
  pct int,
  RunningTotal int
);


------------- Tally table generation
;With tally
as
(
	select TOP 1000 ROW_NUMBER()Over(Order by (Select NULL)) -1 AS Rn
	from  sys.all_columns c
)


--- insert the data in table 
insert into @t
select @startYear + rn as years, case when rn = 0 then 0 else 10 end pct, 0.0
from tally
Where (@startYear + rn) <= @endYear

----------- Applied Quirky method 
UPDATE @t
  SET @RunningTotal = RunningTotal = (@amt - ((@amt * pct)/100))
			, @amt = @RunningTotal
			, pct = 10
  FROM @t
option (maxdop 0);	--- this will stop parallelism  

----------- Result
select * from @t

For more understanding on Quirky check this Link. Most of the people will say this is a undocumented way but i am using this approach from SQL SERVER 2000 till 2012 its and its working.

Reduce the Cost Year by Year

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0