https://dbsysupgrade.com/oracle1/
you want to know if there are jobs in state running? don't worry enough to read this article!
how tothere areviewjobsrunning
https://www.mongodb.com/ko-kr/docs/upcoming/core/views/join-collections-with-view/
Use $lookup to create a view over two collections and then run queries against the view without having to construct or maintain complex pipelines.
collections databaseuseviewjointwo
https://www.mongodb.com/ko-kr/docs/upcoming/core/views/update-view/
Modify a view in MongoDB by either dropping and recreating it or using the `collMod` command.
modifyremoveviewdatabasemanual