delete all Collections docs mongodb code example

Example 1: mongo delete all documents

db.bios.remove( { } )

Example 2: mongodb delete all documents

# To remove all documents in a collection, call the remove method with an empty query
# document {}. The following operation deletes all documents from the bios collection:

db.bios.remove( { } )

Example 3: delete an item from db collection mongodb

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

Example 4: mongo remove all tables

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