MongoDB Show all contents from all collections

问题

Is it possible to show all collections and its contents in MongoDB?

Is the only way to show one by one?

回答1:

Once you are in terminal/command line, access the database/collection you want to use as follows:

show dbs
use <db name>
show collections

choose your collection and type the following to see all contents of that collection:

db.collectionName.find()

More info here on the MongoDB Quick Reference Guide.

回答2:

Step 1: See all your databases:

show dbs

Step 2: Select the database

use your_database_name

Step 3: Show the collections

show collections

This will list all the collections in your selected database.

Step 4: See all the data

db.collection_name.find()

db.collection_name.find().pretty()

回答3:

var collections = db.getCollectionNames();
for(var i = 0; i< collections.length; i++){    
   print('Collection: ' + collections[i]); // print the name of each collection
   db.getCollection(collections[i]).find().forEach(printjson); //and then print the json of each of its elements
}

I think this script might get what you want. It prints the name of each collection and then prints its elements in json.

回答4:

Before writing below queries first get into your cmd or PowerShell

TYPE:
mongo             //To get into MongoDB shell
use <Your_dbName>      //For Creating or making use of existing db

To List All Collection Names use any one from below options :-

show collections  //output every collection
  OR
show tables
  OR
db.getCollectionNames() //shows all collections as a list

To show all collections content or data use below listed code which had been posted by Bruno_Ferreira.

var collections = db.getCollectionNames();
for(var i = 0; i< collections.length; i++) {    
   print('Collection: ' + collections[i]); // print the name of each collection
   db.getCollection(collections[i]).find().forEach(printjson); //and then print     the json of each of its elements
}

回答5:

step 1: Enter into the MongoDB shell.

mongo

step 2: for the display all the databases.

show dbs;

step 3: for a select database :

use 'databases_name'

step 4: for statistics of your database.

db.stats()

step 5: listing out all the collections(tables).

show collections

step 6:print the data from a particular collection.

db.'collection_name'.find().pretty()

回答6:

This way:

db.collection_name.find().toArray().then(...function...)

回答7:

This will do:

db.getCollectionNames().forEach(c => {
    db[c].find().forEach(d => {
        print(c); 
        printjson(d)
    })
})

回答8:

I prefer another approach if you are using mongo shell:

First as the another answers: use my_database_name then:

db.getCollectionNames().map( (name) => ({[name]: db[name].find().toArray().length}) )

This query will show you something like this:

[
        {
                "agreements" : 60
        },
        {
                "libraries" : 45
        },
        {
                "templates" : 9
        },
        {
                "users" : 18
        }
]

You can use similar approach with db.getCollectionInfos() it is pretty useful if you have so much data.

来源：https://stackoverflow.com/questions/24985684/mongodb-show-all-contents-from-all-collections

标签

mongodb

collections

find