Which MongoDB operation removes all documents that match the specified condition from a collection?a)removeManyb)eraseAllc)removeAlld)deleteMany
Question
Which MongoDB operation removes all documents that match the specified condition from a collection?a)removeManyb)eraseAllc)removeAlld)deleteMany
Solution
The MongoDB operation that removes all documents that match the specified condition from a collection is d) deleteMany.
Here are the steps to use it:
- Connect to your MongoDB instance.
- Select the database and the collection you want to work with.
- Use the deleteMany() method, passing the condition as a parameter. The condition should be a document that specifies the match criteria.
For example, if you have a collection named "students" and you want to remove all documents where the "age" field is less than 20, you would do:
db.students.deleteMany({ age: { $lt: 20 } });
This command will remove all documents from the "students" collection where the "age" is less than 20.
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