db.httpRequestLog.count();

{$and:[{"requestUrl":"/sleep_reports/pad/report/upload"},{"requestParam.ring_sn":"P11E12210000035"}]}

{$or:[{"requestParam.ring_sn":"P11E12210000035"},{"requestParam.ring_sn":"P11E12210000036"}]}

{"zyzd":{$in:["胃痛"]}}

創建索引：db.httpRequestServiceLog.ensureIndex({"createTime": 1},{expireAfterSeconds: 2592000});
查看索引：db.httpRequestLog.getIndexes();
刪除索引：db.httpRequestLog.dropIndex("createTime");

db.patient.find({}).forEach(
    function(item){
    　　db.patient.update({"_id":item._id},{$set:{'shenfenzheng':item.cardId}},false,false);
    }
);