Show database in MongoDB

To display the number of databases in MongoDB, you need to create at least one document in the database.

Suppose you have created a database but have not added any documents to it. Then that particular database will not be visible in the database list.

The following is the query to create the database -

> use app;
switched to db app

The following is the query to display all databases -

> show dbs;

This will produce the following output. The new database "app" will not be visible because we have not added at least one document in it -

admin                0.002GB
business             0.000GB
config               0.000GB
local                0.000GB
main                 0.000GB
my                   0.001GB
sample               0.003GB
sampleDemo         0.000GB
studentSearch 0.000GB
test 0.022GB
university 0.000GB
web 0.001GB
webcustomertracker 0.000GB

Let's first create a collection containing the documents in the "app" database -

> db.demo.insert({"StudentName":"Chris"});
WriteResult({ "nInserted" : 1 })

The following is the query to display all the documents in the collection with the help of find() method-

> db.demo.find();

This will produce the following output-

{ "_id" : ObjectId("5e07250e25ddae1f53b62204"), "StudentName" : "Chris" }

This is the query to display all the databases in MongoDB-

> show dbs;

This will produce the following output. Now the "app" database will be visible in the database list -

admin                      0.002GB
app                        0.000GB
business                   0.000GB
config                     0.000GB
local                      0.000GB
main                       0.000GB
my                         0.001GB
sample                     0.003GB
sampleDemo                 0.000GB
studentSearch            0.000GB
test 0.022GB
university 0.000GB
web 0.001GB
webcustomertracker 0.000GB

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