dynamic query

I need to change the query, according to the parameter I get from url to the reporting services.

For example,

if url =http://localhost:reportserver/parmeter=true?param1=A

then, I need to use a "query1" for the report . If param1 = B, then I need to use "query2".

I would like to know whether this is possible..

thanks,

I suggest using a stored procedure as the dataset for your target report.

The stored procedure would accept as its one parameter the report parameter of the target report and run the required query accordingly.