Shulou(Shulou.com)06/01 Report--

The document records of the MongoDB collection, if not needed, can be permanently deleted by the delete command.

Syntax: db.collection.remove

Db.getCollection ("test") .remove ({price: {$gt: 100}}, writeconcern: {w: "majority", wtimeout: 3000})

(delete all the document records of price boy 3, and when the time is more than 5 seconds, or when most of the replica set has completed the execution of the command, the execution of the command will be interrupted and the operation result of the command will be returned)

Db.getCollection ("test") .remove ({price: {$gt: 100}}, justOne: true)

(delete the first document record whose price is greater than 3)

To delete an entire document record, it is more efficient to use the db.collection.drop () method, which deletes the entire collection along with the index.

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