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How to operate on all databases from the MongoDB shell?
To operate on all databases from MongoDB shell, you can use listDatabases along with adminCommand().
Let’s say we are using a sample database “test”. At first, check the current database with the help of db command.
Following is the query to get the current database
> db;
This will produce the following output
Test
Following is the query to operate on all the databases from the Mongo shell
> var allDatabaseList = db.adminCommand('listDatabases');Now you need to use printjson() in order to print all databases. Following is the query
> printjson (allDatabaseList);
This will produce the following output
{
"databases" : [
{
"name" : "admin",
"sizeOnDisk" : 495616,
"empty" : false
},
{
"name" : "config",
"sizeOnDisk" : 98304,
"empty" : false
},
{
"name" : "local",
"sizeOnDisk" : 73728,
"empty" : false
},
{
"name" : "sample",
"sizeOnDisk" : 1388544,
"empty" : false
},
{
"name" : "sampleDemo",
"sizeOnDisk" : 278528,
"empty" : false
},
{
"name" : "studentSearch",
"sizeOnDisk" : 262144,
"empty" : false
},
{
"name" : "test",
"sizeOnDisk" : 9695232,
"empty" : false
}
],
"totalSize" : 12292096,
"ok" : 1
}
Updated on: 30-Jul-2019
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