How to return to first record in table after a while statement?

Question

Hi,
I'm trying to multiply data from two different tables to get a distance between two points - I only want to return the result if the distance is less than 0.15 metres. It loops ok the first time but dies once I get into the second while for the second time. I'm sure I have the logic wrong, I just can't figure out the right way. I haven't used Java or programmed in four years so apologises if the answer is ridiculously simple!
public static void main(String args[])
          try
               FileOutputStream out = new FileOutputStream("c://output.txt", true);
               PrintStream p;
// Connect print stream to the output stream
p = new PrintStream( out );
               Connection conn = getConnection();
          System.out.println("1");
          Statement st1 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
          Statement st2 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
          ResultSet inact = st1.executeQuery("select Radio, aLocationLatLong, Lat, Lon from Inactive_EK");
          ResultSet act = st2.executeQuery("select Radio, aLocationLatLong, Lat, Lon from Active_EK");
          while(inact.next())
               R_ID = inact.getString("Radio");     
               inLt = inact.getDouble("Lat");          
               inLn = inact.getDouble("Lon");
               p.println("Inactive: " + R_ID + " " + inLt + " " + inLn);
               while(act.next())
                    acR_ID = act.getString("Radio");
                    acLt = act.getDouble("Lat");
                    acLn = act.getDouble("Lon");
                    p.println("Active Lat: " + acLt + " " + acLn );
                         double earthRadius = 6378.137;
                         double dLat = Math.toRadians(inLt-acLt);
                         double dLng = Math.toRadians(inLn - acLn);
                         double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
                    Math.cos(Math.toRadians(acLt)) * Math.cos(Math.toRadians(inLt)) *
                    Math.sin(dLng/2) * Math.sin(dLng/2);
                         double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
                         double dist = earthRadius * c;
                         if(dist <= 0.15)
                              p.println("Active Lat: " + acR_ID + " " + acLt + " " + acLn + " " + dist);
               p.close();
               st1.close();
               st2.close();
               conn.close();
          catch
          (Exception e)
System.err.println ("Connect problem");
Thanking you in advance!

Answer 1

Try something like below: change the script as required.
create Table T1(Col1 int)
Insert into T1 Select 1
Insert into T1 Select 2
Declare @T1 Table(Col1 int, errmsg varchar(100))
create Table T2(Col1 int, errmsg varchar(100))
DELETE T1
output deleted.*,'error 1' INTO @T1
Where Col1 = 1
Select * From @t1
If exists(Select 1 From @t1)
Begin
Insert into T2 Select * From @T1
Drop table T1,T2
return ;
End
DELETE T1
output deleted.*,'error 2' INTO @T1
Where Col1 = 2
Select * From @t1
Insert into T2 Select * From @T1
Select * From T2
Drop table T1,T2