Category "dao"

When searching for non-primary key in MySQL using DAO it keeps returning a null object

The first method works but the second method keeps returning a null object. I don't see any difference except that flight_no is the primary key. What went wrong

I am receiving a syntax error on "reimbursement_resolver" in the string line for index 5. My DAO package is set up correctly, yet this still occurs

@Override public Reimbursement updateReimbursement(Reimbursement r) { Connection c = cs.getConnection(); String sql = "UPDATE reimbursement " +