In order to delete the collection which has some special characters like _ or -, you need to use the following syntax −
db.getCollection("yourCollectionName").drop();
To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −
> db.createCollection("_personalInformation"); { "ok" : 1 } > db.getCollection('_personalInformation').insertOne({"ClientName":"Chris","ClientCountryName":"US"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9158bb4afe5c1d2279d6b2") } > db.getCollection('_personalInformation').insertOne({"ClientName":"Mike","ClientCountryName":"UK"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9158c84afe5c1d2279d6b3") } > db.getCollection('_personalInformation').insertOne({"ClientName":"David","ClientCountryName":"AUS"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9158d54afe5c1d2279d6b4") }
Display all documents from a collection with the help of find() method. The query is as follows −
> db.getCollection('_personalInformation').find().pretty();
The following is the output −
{ "_id" : ObjectId("5c9158bb4afe5c1d2279d6b2"), "ClientName" : "Chris", "ClientCountryName" : "US" } { "_id" : ObjectId("5c9158c84afe5c1d2279d6b3"), "ClientName" : "Mike", "ClientCountryName" : "UK" } { "_id" : ObjectId("5c9158d54afe5c1d2279d6b4"), "ClientName" : "David", "ClientCountryName" : "AUS" }
Here is the query to delete the collection from MongoDB which has a special character −
> db.getCollection("_personalInformation").drop();
The following is the output −
True
The result TRUE states that we have deleted the collection from MongoDB completely.