robo3T服务器的增、删、改、查

增
//增加一条
db.list.insertOne({name:"雷公河行动",fen:"8.9"})
//增加多条
db.list.insertMany([{name:"红海行动",fen:"8.8"},{name:"肖申克的救赎",fen:"9.9"},{name:"战狼",fen:"8.9"},{name:"西红柿首付",fen:"9.2"}])

删多条
db.list.deleteMany({name:"雷公河行动"})

改多条
db.list.updateMany({   "fen" : "0"},{ $set:{"fen" : "8.9"}})

查
db.list.find()
db.list.find({fen:{$lt:"9.2"}})
db.getCollection('list').find({ "name" : "肖申克的救赎"})