Get INvalid descriptor index

Question

i used the following in my code. compiles ok but give a
Invalid Descriptor Index
when i try to run this. why? isn't the index automatic?
if not how can i get this index?
while(res.next()) {
tour = res.getString(1) + " TO " + res.getString(2);
pls advise

Answer 1

I agree that the original SQL returned a single column.
Try this:
"SELECT
            COLUMN2NAME,
            COLUMN3NAME,
            COLUMN6NAME,
            MAX(RANK)
FROM
            MON1
WHERE
            FROMNODE = " + from +
"           AND PICK = 0
GROUP BY
            COLUMN2NAME,
            COLUMN3NAME,
            COLUMN6NAME"            You'll use res.getString(1) to get COLUMN2NAME
You'll use res.getString(2) to get COLUMN3NAME
Since you are using a Access database, try getting the SQL statement to work in Access. Once the query works in Access, you can copy it over to Java.