MongoDB equivalent of SQL "OR" -

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Therefore, finding the MongoDB records is the default for "AND". For example: 

  db.users.find ({age: {'$ gte': 30}, {'$ lte': 40}});

Finds the above queries users> = 30 and & lt; = 40 years old.

How do I find a user & lt; = 30 OR > = 40 years old?

There will be one or the operator near future At night the Mongodb build is already $ or you can use $ and use javascript or you can use it or

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