system.*
getMore
killCursors
db.collection.aggregate()
aggregate
$collStats
$currentOp
$indexStats
$listLocalSessions
$listSessions
$merge
$out
$planCacheStats
db.collection.countDocuments()
$where
$near
$nearSphere
$match
$group
$sum
db.collection.distinct()
distinct
db.collection.find()
find
geoSearch
db.collection.deleteMany()
db.collection.deleteOne()
db.collection.remove()
delete
db.collection.findOneAndDelete()
db.collection.findOneAndReplace()
db.collection.findOneAndUpdate()
findAndModify
upsert
db.collection.insertMany()
db.collection.insertOne()
db.collection.insert()
insert
db.collection.save()