我有一个名为“飞机”的数据库，里面有一个名为booking的表。预订表有phone（int type）、name（text type）、address（text type）、city（text type）、destination（text type）、date（text type）列。我只想获取phone列的值或数据等于用户输入的phone number的行。我为此编写了以下代码。对于上下文，我使用java和jdbc

static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_URL = "jdbc:mysql://localhost:3306/airplane";
static final String USER = "root";
static final String PASS = "";

Connection conn = null;

try
  {
    System.out.println("enter cell no");
    int cell=sc.nextInt();
    conn = DriverManager.getConnection(DB_URL, USER, PASS);
    System.out.println("Connected database successfully...");

   // My SQL SELECT query.

    String query = "SELECT * FROM `booking` where phone=cell";

   // creating the java statement
   Statement st = conn.createStatement();

   /**executing the query, and getting a java resultset of all rows whose phone
    column has the value equal to one entered by user and stored by me in 
  int variable cell**/

   ResultSet rs = st.executeQuery(query);

         //iterate through the java resultset
         while (rs.next())
           {
            int Phone = rs.getInt("phone");
            String Name = rs.getString("name");
            String Address = rs.getString("address");
            String City = rs.getString("city");
            String Destination = rs.getString("destination");
            String Date = rs.getString("date");

// print the results
           System.out.format("%d, %s, %s, %s, %s, %s\n", Phone, Name, Address, City, Destination, Date);
                       }

                        st.close();
                    }
                    catch (Exception e)
                    {
                        System.err.println("Got an exception! ");
                        System.err.println(e.getMessage());
                    }

我得到一个错误：

Got an exception! 
Unknown column 'cell' in 'where clause'

我做错什么了？