MongoDB 常用语句
db.mycollection.find({"IMAGE URL":{$exists:true}});
db.mycollection.find({"IMAGE URL":{$ne:null}});
db.mycollection.find({"mykey":{$exists:true}}).sort({"sendTime":-1})
MongoDB 常用语句
db.mycollection.find({"IMAGE URL":{$exists:true}});
db.mycollection.find({"IMAGE URL":{$ne:null}});
db.mycollection.find({"mykey":{$exists:true}}).sort({"sendTime":-1})