我为什么得到：[Oracle] [ODBC] [Ora] ORA-00904：无效的标识符

  //get parameters from the request
   String custID=request.getParameter(\"cust_ID\");
   String saleID=request.getParameter(\"sale_ID\");
   String firstName=request.getParameter(\"first_Name\");
   String mInitial=request.getParameter(\"mI\");
   String lastName=request.getParameter(\"last_Name\");
   String streetName=request.getParameter(\"street\");
   String city=request.getParameter(\"city\");
   String state=request.getParameter(\"state\");
   String zipCode=request.getParameter(\"zip_Code\");
   String DOB2=request.getParameter(\"DOB\");
   String agentID=request.getParameter(\"agent_ID\");
   String homePhone=request.getParameter(\"home_Phone\");
   String cellPhone=request.getParameter(\"cell_Phone\");
   String profession=request.getParameter(\"profession\");
   String employer=request.getParameter(\"employer\");
   String referrer=request.getParameter(\"referrer\");


  query =
    \"UPDATE customer\"
    + \" SET customer.cust_ID=custID, customer.sale_ID=saleID, customer.first_Name=firstName, customer.mI=mInitial, customer.last_Name=lastName, customer.street_Name=streetName, customer.city=city, customer.state=state, customer.zip_Code=zipCode,customer. DOB=DOB2, customer.agent_ID=agentID, customer.home_Phone=homePhone, customer.cell_Phone=cellPhone, customer.profession=profession, customer.employer=employer, customer.referrer=referrer\"
    + \" WHERE customer.cust_ID=custID \" ;

  preparedStatement = conn.prepareStatement(query);


  preparedStatement.executeUpdate();

        CREATE TABLE customer
          (cust_ID      NUMBER          NOT NULL,
          sale_ID       NUMBER          NOT NULL,
          first_NameVARCHAR2(30)                NOT NULL,
          mI            VARCHAR2(2)         ,
          last_Name     VARCHAR2(50)        NOT NULL,
          street_Name       VARCHAR2(50)        ,
          city          VARCHAR2(30)        NOT NULL,
          state         VARCHAR2(50)        NOT NULL,
          zip_Code      VARCHAR2(5)     NOT NULL,
          DOB           DATE            ,
          agent_ID      NUMBER              ,
          home_Phone        VARCHAR2(12)        UNIQUE,         
          cell_Phone        VARCHAR2(12)        UNIQUE,
          profession        VARCHAR2(30)            ,
          employer      VARCHAR2(30)            ,
          referrer      VARCHAR2(30)            
   );