Inserting into MS Access Database - Wierd resultset!!

Question

I'm developing an application that takes in values from t1 in the database, performs operations on them and inserts them into t2. For this I have to check all records in t2 every time I'm about to make an insertion.. Strangely enough, rs1.beforeFirst() (rs1 is the resultset for t2) in my code refuses to put the cursor before the 1st row, and the code continues operations from the last row..Help!!
Here's a sample of my code:
rs1.beforeFirst();
               if(rs1.next())
                    do
                         if(rs1.getInt("uid")!=i)
                         {     rs1.next();     }
                         else
                         {     break;
                    }while(!rs1.last());
                    if(rs1.isAfterLast())
                    {     n=1;
                         s1="Insert into t_urlinfo values('" + dt + "'," + i + ",'" + text + "'," + n + ")";
                         System.out.println(s1);
                         stmt2.executeUpdate(s1);
                    }

Answer 1

Where, in that code, are you calling beforeFirst?
Also, why do you feel it necessary to "check every row" before an insert? Is it to avoid duplicates? If so, does your table have a primary key or other unique field? If so, simply attempt to insert and then catch the SQLException.