JDBC4/MySQL syntax error: when retrieving data from mysql table - mysql

Question

Is there anything wrong in the code below?
String sql = "SELECT username, password FROM REGCUSTOMERS" + "WHERE username = ? AND password = ?";
I'm trying to get the data from the username and password column of REGCUSTOMERS table.
Eclipse 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 '= ? AND password = ?' at line 1
private boolean isAuthenticated(String userid, String password) {
// JDBC logic to verify from database.
try {
Class.forName(driverName);
Connection conn = null;
PreparedStatement st = null;
String sql = "SELECT username, password FROM REGCUSTOMERS" + "WHERE username = ? AND password = ?";
conn = DriverManager.getConnection(databaseURL, USERNAME, PASSWORD);
st = conn.prepareStatement(sql);
ResultSet rs = st.executeQuery(sql);
if (rs.getString("username") != userid && rs.getString("password") != password) {
return false;
}
rs.close();
st.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
return true;
}

Answer 1

You have no space between REGCUSTOMERS and WHERE. Add the space and you should be fine:
String sql = "SELECT username, password FROM REGCUSTOMERS " + "WHERE username = ? AND password = ?";

Answer 2

This part:
... FROM REGCUSTOMERS" + "WHERE username ...
Will result in the following SQL:
FROM REGCUSTOMERSWHERE
That of course is wrong.
The + doesn't make sense there, but if you want it, you need a space at least on one side
"... FROM REGCUSTOMERS " + "WHERE username ..."