Dynamic Column In The Query Using SQL 2005

Hi All,

 I am using Micosoft Visual Studio Report Desinger. with MS SQL 2005.

I have a table transac table fields are likely,

location,date,amount values,

USA,01/07/2006,3000

SG,01/07/2006,2500

USA,02/07/2006,6000

SG,02/07/2006,3500

USA,03/07/2006,1000

SG,03/07/2006,6700

USA,04/07/2006,500

SG,04/07/2006,200

Am writing query for date = 04/07/2006

select location,date,amount from transac where date = 04/07/2006

I wanted to add two more column in the query which is

a.two days before what is the amount

b. From 01/07/2006 to 04/07/2006 what is the amount

 

The result I want to be

Location,date,amount,2daysbefore,uptodate

USA,04/07/2006,500,6000,10500

SG,04/07/2006,200,3500,12900

How to write a query ?.

I am writing this query from DataSet for Report Desinger.

Is there any way to include this two column.

Please Advise,

Regrads Saleem