Importing and Exporting MongoDB Database

1- Overview

MongoDB provides you with 2 ways:
  1. mongoexport/mongoimport
  2. mongodump/mongostore
mongoexport: Being used to export data from a Collection to a file ( json, csv,..)
mongoimport: Being used to import data to a Collection from a file ( json, csv,..)
Collection is the concept of MongoDB, which is equivalent to Table concepts in relational databases ( Oracle, SQL Server, MySQL, ..).
mongodump: Being used to export all datas of a database to files (Put in a folder), including some files ( bson, json)
mongostore: Being used to import all datas to a database from dump directory (Product of mongodump)

2- Import/Export Collection

2.1- mongoexport

# Export to json
mongoexport -d database_name - c collection_name -o outfile.json

# Export to file csv
mongoexport --csv -o /tmp/people.csv -d school -c people -f firstName,lastName,telephone,email

2.1.1- mongoexport ra file json

In the case of simple export, you don't need to use many options in  mongoexport command:
# Export to json file
# This is the simplest syntax.
# The default output is json file so you do not need to specify the output file type

mongoexport -d database_name -c collection_name -o outfile.json
Example, export a collection to JSON file:
cd C:\DevPrograms\MongoDB\bin
Export Department Collection in myfirstdb database to json file:  C:/test/department.json.
Note: MongoDB is case sensitive.
  • Department
  • Employee
  • Inventory_Item
  • Product_Category

mongoexport -d myfirstdb -c Department -o C:/test/department.json
See the newly exported file:

2.1.2- mongoexport to csv file

# Export to csv file
# This is the simplest syntax:
# In the case csv file, you must provide the list of columns Collection (Required).
# List of columns separated by commas and no spaces.
# Must declare what type of output file (--csv)

mongoexport -d database_name -c collection_name -f column_1,column_2,column_3 --csv -o outfile.csv
mongoexport -d myfirstdb -c Department -f dept_id,dept_no,dept_name,location,description --csv -o C:/test/department.csv
Open department.csv with Microsoft Excel:

2.1.3- mongoexport and options

  • TODO

2.2- mongoimport

# Import from json file
mongoimport -d database_name -c collection_name outfile.json

# Import from csv file
# --headerline: Using the first row of data as the column name of the Collection.
mongoimport -d database_name -c collection_name --type csv --file locations.csv --headerline

2.2.1- mongoimport from json file

Import data from a json file into a Collection:
cd C:\DevPrograms\MongoDB\bin
# Import from json file.
mongoimport -d database_name -c collection_name outfile.json

# Import into myfirstdb database
# Insert into Collection: Department2
# From file C:/test/department.json
mongoimport -d myfirstdb -c Department2 C:/test/department.json
See result on visual tools RoboMongo:

2.2.2- mongoimport from csv file

Import data from a csv file into a Collection:
# Import from csv file
# This is the simplest syntax:
# --headerline: Using the first row of data as the column name of the Collection.

mongoimport -d database_name -c collection_name --type csv --file locations.csv --headerline

cd C:\DevPrograms\MongoDB\bin
# Import from file to database: myfirstdb
# Into collection: Department3
# File location: C:/test/department.csv
# --headerline: Using the first row of data as the column name of the Collection.

mongoimport -d myfirstdb -c Department3 --type csv --file C:/test/department.csv --headerline
Result see on visual tool RoboMongo:

2.3- mongoexport/mongoimport and options

In a general situation, you have options for import/export, see in the following table:
Option  Meaning Example
--help produce help message  
-v [ --verbose ] be more verbose (include multiple times for more verbosity e.g. -vvvvv)  
-h [ --host ] arg mongo host to connect to ("left,right" for pairs)  
--port arg server port. (Can also use --host hostname:port)  
--ipv6 enable IPv6 support (disabled by default)  
-d [ --db ] arg database to use  
-c [ --collection ] arg collection to use (some commands)  
-u [ --username ] arg username  
-p [ --password ] arg password  
--dbpath arg directly access mongod data files in the given path,instead of connecting to a mongod instance - needs to lock the data directory, so cannot be used if a mongod is currently accessing the same path  
--directoryperdb if dbpath specified, each db is in a separate directory  
-f [ --fields ] arg comma seperated list of field names e.g. -f name,age  
--fieldFile arg file with fields names - 1 per line  
--ignoreBlanks if given, empty fields in csv and tsv will be ignored  
--type arg type of file to import.  default: json (json,csv,tsv)  
--file arg file to import from; if not specified stdin is used  
--drop drop collection first  
--headerline CSV,TSV only - use first line as headers  
--upsert insert or update objects that already exist  
--upsertFields arg comma-separated fields for the query part of the upsert. You should make sure this is indexed.  
--stopOnError stop importing at the first error rather  than continuing  
--jsonArray load a json array, not one item per line. Currently limited to 4MB.  

3- Import/Export Database

mongodump used to export the entire database to a directory.
mongostore used to import the all datas to a database from a directory (export product of mongodump).

3.1- mongodump

# The syntax to export the entire database to a directory (Includes some files)

mongodump -d database_name -o output_directory
Export myfirstdb database to directory: C:/test
cd C:\DevPrograms\MongoDB\bin
mongodump -d myfirstdb -o C:/test
The result, subfolder myfirstdb created in the directory C:/test, it contains some files.

3.2- mongorestore

# The simplest syntax to import an entire database.

mongorestore -d database_name path_to_database
For example, the folder C:/test/myfirstdb containing the dump files. We will use it to import into the database: mydb2
cd C:\DevPrograms\MongoDB\bin
mongorestore -d mydb2 C:\test\myfirstdb
View on visual tools RoboMongo:

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