修改有数据oracle字段类型 从number转为varchar

alter table ta_sp_org_invoice add permile_temp number;

update ta_sp_org_invoice set permile_temp=RESCUE_PHONE,RESCUE_PHONE=null;

alter table ta_sp_org_invoice modify RESCUE_PHONE VARCHAR2(100);

update ta_sp_org_invoice set RESCUE_PHONE=to_char(permile_temp),permile_temp=null;

alter table ta_sp_org_invoice drop column permile_temp;