MongoDB Drop Collection

MongoDB Drop Collection

The MongoDB drop collection operation is used to delete an existing collection from a database. This command permanently removes the collection and all its documents, making it a powerful and irreversible action.

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Syntax

db.collection.drop()

The db.collection.drop() method drops the specified collection.

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Example MongoDB Drop Collection

Let's look at some examples of how to drop a collection in MongoDB:

1. Drop a Collection

db.programGuru.drop()

This command drops the programGuru collection from the current database.

2. Verify Collection Deletion

show collections

This command lists all collections in the current database. You should no longer see programGuru in the list.

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Full Example

Let's go through a complete example that includes switching to a database, dropping a collection, and verifying its deletion.

Step 1: Switch to a Database

This step involves switching to a database named myDatabase.

use myDatabase

In this example, we switch to the myDatabase database.

Step 2: Drop a Collection

This step involves dropping a collection named programGuru in the myDatabase database.

db.programGuru.drop()

Here, we drop the programGuru collection.

Step 3: Verify the Collection Deletion

This step involves listing the collections in the myDatabase database to verify that programGuru has been deleted.

show collections

This command lists all collections in the current database. You should not see programGuru in the list.

Conclusion

The MongoDB drop collection operation is a critical command for deleting collections. It is essential to use this command carefully, as it permanently removes the collection and all its documents.