import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class CheckCat {
    public static void main(String[] args) {
        try {
            Class.forName("oracle.jdbc.OracleDriver");
            Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521/sisvietnam", "sisvietnam", "sisvietnam");
            
            PreparedStatement stmt = conn.prepareStatement("SELECT category_id FROM sis_post WHERE id = 6450");
            ResultSet rs = stmt.executeQuery();
            if (rs.next()) {
                System.out.println("Category ID: " + rs.getLong(1));
            }
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}