yuanchengpasc/application/common/versionsql/Version2

ALTER  TABLE  `images`  ADD  (
    `images`  ADD  remote_url varchar(100),
    `images`  ADD  status  int(11) default 2,

)local_url varchar(255);
ALTER  TABLE  `exams`  ADD  ext  json;
ALTER  TABLE  `images`  ADD  INDEX image_status (  `status`  );