关于mongoDB查询问题

Question

我想根据时间date查询数据库，在查询到的数据中，busNo相同的情况下，把data里的值相加。这要怎么写查询语句呢

Answer 1

db.bus_alarm_stat.aggregate([{ $project: {   "busNo": "$busNo","groupId" :"$groupId","date":"$date","DANGEROUS_DRIVE":"$data.DANGEROUS_DRIVE","FATIGUE_DRIVE" : "$data.FATIGUE_DRIVE", "OUT_AREA":"$data.OUT_AREA"}},{$match:{"date":{"$gte": "2017-07-23","$lte": "2017-07-25"}}},{"$group":{_id:"$busNo",DANGEROUS_DRIVE:{"$sum":"$DANGEROUS_DRIVE"},FATIGUE_DRIVE:{"$sum":"$FATIGUE_DRIVE"},OUT_AREA:{"$sum":"$OUT_AREA"},   }}]);自己把它解决啦