View的使用¶
（只读）:
// 创建view
db.runCommand( { create: <view>, viewOn: <source>, pipeline: <pipeline> } )
db.runCommand( { create: <view>, viewOn: <source>, pipeline: <pipeline>, collation: <collation> } )
mongo> db.createView(<view>, <source>, <pipeline>, <collation> )
// 删除view
db.collection.drop()
//The following read operations can support views:
db.collection.find()
db.collection.findOne()
db.collection.aggregate()
db.collection.count()
db.collection.distinct()