I have installed mongodb on windows system,
I have run mongod on command prompt
Now in another command prompt I am running mongo command which connected to test database. But when I try to execute show collections command nothing is happening.
I want to know how to trigger show collection, create collection commands from cmd
To show all the databases present in MongoDB, you need to issue the "show dbs" command at the prompt:
MongoDB shell version: 2.6.5
connecting to: test
> show dbs
admin 0.078GB
local 0.078GB
Only two databases exist i.e. the system dbs 'admin' and 'local'
Next, issue the command "use new-db" to switch from the default database to the defined database "new-db". At this juncture, MongoDB will not automatically create any databases or collections yet until you manually create a collection or save a document inside. So run the following commands
> use new-db
switched to db new-db
> show dbs
admin 0.078GB
local 0.078GB
"new-db" does not show up after the "show dbs" command because it does not have any collections yet, so you need to create a test collection named "people", and insert a document inside. There are a couple of ways you can go about creating a collection, you can either issue the db.createCollection() command:
The following command simply creates a collection named people:
> db.createCollection("people")
Or you can just call the collection's insert() or save() command, which will automatically create the collection and the new-db database:
> db.people.save({"name": "mujaffars"})
WriteResult({ "nInserted" : 1 })
> db.people.find()
{ "_id" : ObjectId("5627430e0899b9f16b9bd781"), "name" : "mujaffars" }
> show dbs
admin 0.078GB
local 0.078GB
new-db 0.078GB
Just,
> use databaseName; // first you need create own db
> db.createCollection("nameCollection"); // ... own collection show
> collection; // find exists collections
> db.nameCollection.find(); // find all documents in collection ...
