mongodb remove all code example

Example 1: mongodb remove all from collection

db.collection.remove({})

Example 2: mongo remove all dbs

mongo --quiet --eval 'db.getMongo().getDBNames().forEach(function(i){db.getSiblingDB(i).dropDatabase()})'

Example 3: mongo delete all documents

db.bios.remove( { } )

Example 4: delete collection mongodb

db.collection.drop()

Example 5: delete an item from db collection mongodb

db.collection.remove(
   ,
   {
     justOne: ,
     writeConcern: 
   }
)