-- Add/modify columns 
alter table TB_CONTACT_REC add C_INCOMING_CALL_PURPOSE VARCHAR2(2);
alter table TB_CONTACT_REC add C_IS_TELESALES_BUSI varchar2(1);
alter table TB_CONTACT_REC add C_IS_EXIT_CUST varchar2(1);
-- Add comments to the columns 
comment on column TB_CONTACT_REC.C_INCOMING_CALL_PURPOSE
  is '来电目的.1-投保及咨询 2-投诉及建议,3-找坐席,4-报案,5-其它咨询';
comment on column TB_CONTACT_REC.C_IS_TELESALES_BUSI
  is '是否是电销业务 0 非电销业务　电销业务';
comment on column TB_CONTACT_REC.C_IS_EXIT_CUST
  is '是否已存在客户 1 已存在　0 未存在';