Update query got stuck

Question

Hi, i am creating an update query, i know I had problem before, but when i use this method, it works in one of the pages. Now i am having problem again. Don't know why. Here are the 2 methods i used, both failed.
method 1:
String sqltextupdate = "UPDATE BYDATA SET b=?, note=?, l_amt=? WHERE DATAID= 500";
Statement stmt = conn.createStatement();
PreparedStatement ps = conn.prepareStatement(sqltextupdate);
ps.setDouble(1, b_amt);
ps.setString(2, notes);
ps.setDouble(3, ls_amt);
ps.executeUpdate();
Method 2:
String sqltextupdate = "UPDATE BYDATA SET b="+b_amt+", note='"+notes+"', l_amt="+ls_amt+" WHERE DATAID=500"
Statement stmt = conn.createStatement();
stmt.executeUpdate(sqltextupdate);
Please help!!
Thank you!

Answer 1

Never mind!
My error: a primary key is create for the table bydata, and the problem is solved.