title: Datasnap query client side
body: <p>I don't understand how to use parameters, to find a proper example of using parameters is a bit difficult. I did manage to use clientdataset filters it does the job, but I am sure it can be done with sql as well. datasnap does not allow such queries , I have read on my research that i must use parameters. I just don't get it. I need a proper example where a server/client is setup using datasnap and  can query from the client similar to the sql: <code>SELECT * FROM tbl_person WHERE person = 20</code></p>
  
  <p>this will give me all people with the age of 20 in a dbgrid. like I said I have manage to do this with filters but the filters is not a 100% correct one or two odd records makes it appearance.</p>
  
  <p>your assistance would be greatly appreciated</p>