Exception when Adding Sql Statements in an Applet.

Question

Hello,
When I have added ResultSet statements in the programme, the programme is giving me exceptions at run time as
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 2. at java.lang.Throwable.<init>(Compiled Code) at java.lang.Exception.<init>(Compiled Code) at java.sql.SQLException.<init>(Compiled Code) at sun.jdbc.odbc.JdbcOdbc.createSQLException(Compiled Code) at sun.jdbc.odbc.JdbcOdbc.standardError(Compiled Code) at sun.jdbc.odbc.JdbcOdbc.SQLExecDirect(Compiled Code) at sun.jdbc.odbc.JdbcOdbcStatement.execute(Compiled Code)* at sun.jdbc.odbc.JdbcOdbcStatement.executeQuery(Compiled Code) at RegistrationApplet.actionPerformed(Compiled Code) at java.awt.Button.processActionEvent(Compiled Code) at java.awt.Button.processEvent(Compiled Code) at java.awt.Component.dispatchEventImpl(Compiled Code) at java.awt.Component.dispatchEvent(Compiled Code) at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code) at java.awt.EventDispatchThread.run(Compiled Code) at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)
Here is the code that is generating the exception
try
URL url1 = new URL("http://www.abc.com/");
URL url2 = new URL("http://www.abc.com/Re-Register.html");
ac = getAppletContext();
ac1 = getAppletContext();
     /* Checking whether the UserID is present or not */
rs = st.executeQuery("select * from Register where UserID="+userid);
     if(rs.next())
     /* If the UserID is present then close the connection and ask the User to re enter the login Information*/
          rs.close();
          System.out.println("Sorry Please Re-Register");
          ac1.showDocument(url2);
     else
          System.out.println("insert into Register values('"+firstname+"','"+lastname+"','"+address+"','"+country+"',"+phonenumber+",'"+emailid+"','"+userid+"','"+password+"','"+b+"')");
                              int x = st.executeUpdate("insert into Register values('"+firstname+"','"+lastname+"','"+address+"','"+country+"',"+phonenumber+",'"+emailid+"','"+userid+"','"+password+"','"+b+"')");
                              System.out.println("inserted" + x);
     ac.showDocument(url1);
catch(Exception e)
     e.printStackTrace();
Can any one help me where am I wring? The Exception is in
rs = st.executeQuery("select * from Register where UserID="+userid);
Thanks
Regards
Uma

Answer 1

So your query is something like "select * from Register where UserID=uma". This compares the field UserID to the field uma, which almost certainly doesn't work. You want your query to look like "select * from Register where UserID='uma'".