Java MYSQL Prepared Statement Error: Check syntax to use near '?' at line 1

Question

I am trying to use the java mysql library but I am having issues using a prepared statement. I am not sure what I am missing. Below is what I have with the MYSQL error attemptin

Answer 1

PreparedStatement method executeQuery() itself returns a ResultSet object

So assign this to a ResultSet object

ResultSet rs = preparedStatement.executeQuery();

Error:

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 
You have an error in your SQL syntax; check the manual that corresponds to
your MySQL server version for the right syntax to use near '?' at line 1

And this error happens because When

ResultSet rs = st.executeQuery(query);

This statement executes it can't find any value in ? operator. so your query remains this "SELECT id, clicks FROM mailer.links WHERE campaign_id=?"; and this throws a MySQL Syntax Exception.