mongodb Archives - Page 9 of 11

Update MongoDB field using value of another field

In MongoDB, is it possible to update the value of a field using the value from another field? The equivalent SQL would be ...

May 4, 2022
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Delete everything in a MongoDB database

I’m doing development on MongoDB. For totally non-evil purposes, I sometimes want to blow away everything in a database—that is, to delete every ...

May 3, 2022
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Find objects between two dates MongoDB

I’ve been playing around storing tweets inside mongodb, each object looks like this: { "_id" : ObjectId("4c02c58de500fe1be1000005"), "contributors" : null, "text" : "Hello ...

May 3, 2022
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When to use MongoDB or other document oriented database systems? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 2, 2022
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Mongod complains that there is no /data/db folder

I am using my new mac for the first time today. I am following the get started guide on the mongodb.org up until ...

May 2, 2022
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How do you rename a MongoDB database?

There’s a typo in my MongoDB database name and I’m looking to rename the database. I can copy and delete like so… db.copyDatabase('old_name', ...

May 1, 2022
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Pretty print in MongoDB shell as default

Is there a way to tell Mongo to pretty print output? Currently, everything is output to a single line and it’s difficult to ...

May 1, 2022
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How do I perform the SQL Join equivalent in MongoDB?

How do I perform the SQL Join equivalent in MongoDB? For example say you have two collections (users and comments) and I want ...

April 30, 2022
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How do you query for “is not null” in Mongo?

I would like to execute a following query: db.mycollection.find(HAS IMAGE URL) What should be the correct syntax? 1Best Answer 11 This will return ...

April 30, 2022
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MongoDB relationships: embed or reference?

I’m new to MongoDB–coming from a relational database background. I want to design a question structure with some comments, but I don’t know ...

April 30, 2022
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