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db.collection.ensureIndex()

This version of the documentation is archived and no longer supported. To upgrade your 5.0 deployment, see the MongoDB 6.0 upgrade procedures.

db.collection.ensureIndex(keys, options)

Note

Removed in 5.0

db.collection.ensureIndex() has been replaced by db.collection.createIndex().

Tip

db.collection.createIndex()

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db.collection.dropIndexes

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db.collection.estimatedDocumentCount

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