mongodb - 命令行增删改查

# insert

db.person.insert({ "name": "kelvin", "age":  })
db.person.insert({ "name": "huahua", "age":  })
db.person.insert({ "name": "xiaomeng", "age":  })
db.person.insert({ "name": "laozhang", "age":  })

# select

db.person.find()
db.person.count()
db.person.find({ "name": "kelvin" })

# update

db.person.update({ "name": "laozhang" }, { "name": "oldzhang", "age":  })

# delete

db.person.remove({ "name": "oldzhang" })