19.4.4.5 Remove Documents

You can use the remove() method to delete some or all documents from a collection in a database. The X DevAPI provides additional methods for use with the remove() method to filter and sort the documents to be removed.

Remove Documents Using Conditions

The example that follows passes a search condition to the remove() method. All documents matching the condition will be removed from the countryinfo collection. In this example, one document matches the condition.

mysql-js> db.countryinfo.remove("_id = 'SEA'")
Query OK, 1 item affected (0.02 sec)

Remove the First Document

To remove the first document in the countryinfo collection, use the limit() method with a value of 1.

mysql-js> db.countryinfo.remove("true").limit(1)
Query OK, 1 item affected (0.03 sec)

Remove the Last Document in an Order

The following example removes the last document in the countryinfo collection by country name.

mysql-js> db.countryinfo.remove("true").sort(["Name desc"]).limit(1)
Query OK, 1 item affected (0.02 sec)

Remove All Documents in a Collection

You can remove all documents in a collection. To do so, use the remove("true") method without specifying any search condition.

Caution

Use care when you remove documents without specifying a search condition. This action will delete all documents from the collection.

Related Information

• See CollectionRemoveFunction for the full syntax definition.

• See Section 19.4.2, “Import Database Sample” for instructions to recreate the world_x database.