mongodb remove documents from collection code example

Example 1: drop a collection in mongodb

db.mycollection.drop()

Example 2: mongodb delete all documents

db.collection.delete_many( { } );

Example 3: mongo delete all documents

db.bios.remove( { } )

Example 4: delete an item from db collection mongodb

db.collection.remove(
   <query>,
   {
     justOne: <boolean>,
     writeConcern: <document>
   }
)