SQL commands in MS-Access....Pls Help

[suhail sarwar]

I have the following sql statement in my program:

PreparedStatement ps = connection.prepareStatement("SELECT Paper1A,Paper1M,Paper2M,Paper3M,Paper4M FROM Monday WHERE AccNo LIKE ?");

This statement works as it will pick out the account numbers from the database. BUT when I input an account number that does not exist in the database it does not give me a SQLException, it just sits there !
Anyone have any ideas as to how I can tell the program that if it does not find the account number it should display a message ??
Any help appreciated,
Thanks
Sarwar
[ March 15, 2003: Message edited by: suhail sarwar ]

[Avi Abrami]

Hi Sarwar,
With all of the databases that I have worked with, when you execute a database query that does not return any rows, it is not an error (and therefore does not give an "SQLException").
The "next()" method (in "java.sql.ResultSet") returns 'false' if there are no more rows in the result set. For an empty result set (i.e. a query that returns no rows), the first invocation of "next()" will return 'false', example:

Connection dbConn = // however you get it
Statement stmt = dbConn.createStatement();
String sql = "select * from emp where ename = 'No such name'";
ResultSet rs = stmt.executeQuery(sql);
if (rs.next()) {
  System.out.println("Query returned at least one row.");
}
else {
  System.out.println("Query returned no rows.");
}

Hope this helps you.
Good Luck,
Avi.

[suhail sarwar]

yes you are right.I've got it working now thanks for your help.