JDBC MySql bind variable syntax error in where clause

Question

I am getting this error: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server

Answer 1

Change

ResultSet rs = stmt.executeQuery(sql);

to

ResultSet rs = stmt.executeQuery();

Answer 2

Don't use executeQuery(String) with prepared statements...

Instead of....

ResultSet rs = stmt.executeQuery(sql);

use...

ResultSet rs = stmt.executeQuery();

Take a look at How to use Prepared Statements for more details

Answer 3

If I understand your question, the problem is you used Statement.executeQuery(String). I'm fairly certain you meant to use PreparedStatement.executeQuery(),

// Let us select all the records and display them.
ResultSet rs = stmt.executeQuery(sql);   // <-- adding sql here makes it use the
                                         //     Statement version.

You wanted to use

// Let us select all the records and display them.
ResultSet rs = stmt.executeQuery();      // <-- use the version from PreparedStatement