Mangodb transaction problem

  mongodb, question

As we all know, mongodb’s data update operation has no transaction, so the consistency of data cannot be guaranteed in the modification of many databases. However, recently I was thinking about a problem: if mongo performs an update operation according to a certain condition, and there are multiple data under this condition, that is, an UPDATE statement updates multiple data, then is there a consistency problem, will there be several data updates, and several data will be reported as errors without updating? Or will all the data be updated in this case?

Not found, not successfully updated, unless the database link address is wrong