How to list all databases in the mongo shell? - database

Question

I know how to list all collections in a particular database, but how do I list all available databases in MongoDB shell?

Answer 1

Listing all the databases in mongoDB console is using the command show dbs.
For more information on mongo shell commands, refer the Mongo Shell Quick Reference.

Answer 2

For database list:
show databases
show dbs
For table/collection list:
show collections
show tables
db.getCollectionNames()

Answer 3

For MongoDB shell version 3.0.5 insert the following command in the shell:
db.adminCommand('listDatabases')
or alternatively:
db.getMongo().getDBNames()

Answer 4

From the command line issue
mongo --quiet --eval "printjson(db.adminCommand('listDatabases'))"
which gives output
{
"databases" : [
{
"name" : "admin",
"sizeOnDisk" : 978944,
"empty" : false
},
{
"name" : "local",
"sizeOnDisk" : 77824,
"empty" : false
},
{
"name" : "meteor",
"sizeOnDisk" : 778240,
"empty" : false
}
],
"totalSize" : 1835008,
"ok" : 1
}
to obtain a vertical list of all databases for downstream processing do this
mongo --quiet --eval "printjson(db.adminCommand('listDatabases'))" | jq '.databases[].name' | tr -d '"'
which gives below output listing all databases
admin
local
meteor

Answer 5

To list mongodb database on shell
show databases //Print a list of all available databases.
show dbs // Print a list of all databases on the server.
Few more basic commands
use <db> // Switch current database to <db>. The mongo shell variable db is set to the current database.
show collections //Print a list of all collections for current database.
show users //Print a list of users for current database.
show roles //Print a list of all roles, both user-defined and built-in, for the current database.

Answer 6

Couple of commands are there to list all dbs in MongoDB shell.
first , launch Mongodb shell using 'mongo' command.
mongo
Then use any of the below commands to list all the DBs.
show dbs
show databases
db.adminCommand( { listDatabases: 1 , nameOnly : true} )
For more details please check here
Thank you.

Answer 7

I have found one solution, where admin()/others didn't worked.
const { promisify } = require('util');
const exec = promisify(require('child_process').exec)
async function test() {
var res = await exec('mongo --eval "db.adminCommand( { listDatabases: 1 }
)" --quiet')
return { res }
}
test()
.then(resp => {
console.log('All dbs', JSON.parse(resp.res.stdout).databases)
})
test()

Answer 8

According to MongoDB official document, for MongoDB 4+, you can list database name only by running db.adminCommand( { listDatabases: 1, , nameOnly: true } ) against the admin database.
If you are using MongoDB Cloud, you need to connect to your MongoDB deployment first. In that case, you can run this command mongosh "mongodb+srv://cluster0.<your-connection-string>.mongodb.net" --apiVersion 1 --username <your-user-name> in your terminal.
Atlas atlas-xxxxxx-shard-0 [primary] test> db.adminCommand({listDatabases:1 , nameOnly: true})
{
databases: [
{ name: 'sample_airbnb' },
{ name: 'sample_analytics' },
{ name: 'sample_geospatial' },
{ name: 'sample_guides' },
{ name: 'sample_mflix' },
{ name: 'sample_restaurants' },
{ name: 'sample_supplies' },
{ name: 'sample_training' },
{ name: 'sample_weatherdata' },
{ name: 'admin' },
{ name: 'local' }
],
ok: 1,
'$clusterTime': {
clusterTime: Timestamp({ t: xxxxxxxxxx, i: 1 }),
signature: {
hash: Binary(Buffer.from("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", "hex"), 0),
keyId: Long("xxxxxxxxxxxxx")
}
},
operationTime: Timestamp({ t: xxxxxxxxxx, i: 1 })
}