Data deletion of MongoDB basic operation

The delete operation uses remove, the data is deleted and the query is similar, accept a parameter, and the query is different, in order to prevent misoperation, the delete operation does not allow the parameter is not passed

Like what

Db.test_collection.remove ()

Will error

Error:remove needs a query: [email protected]/mongo/shell/collection.js:356:1[email protected]/mongo/shell/ Collection.js:383:18

When different from the update, the delete operation deletes all data that meets the criteria by default

> Db.test_collection.remove ({c:2"nremoved": 3})

From the feedback results can be seen, deleted 3 data, and then look for the C 2 data no longer exists

Delete a table

> db.test_collection.drop ()true

Again

Show tables

I can't see the data.

Data deletion of MongoDB basic operation