How to import data into a mongodb database

[Aastha77Gupta]

Hi,

I am just starting to work with the technology. How should I import all the datasets on MongoDB database on my local computer.

Thank You!

[ozlerhakan]

Hi @Aastha77Gupta ,

There are 2 different techniques to import datasets into your mongod depending on a file structure.

The mongoimport command; you can import CSV, TSV and JSON files using this terminal command. You can import a file generated using the mongoexport command as well. For example, if you download the files ending with .json (in our case Catalog.Books), you can give a database name and a collection name followed by one of the accepted files as follows:

$ mongoimport -d library -c books books.json

Another command is mongorestore; the files you want to import are called backup files and they are stored in binary format. These files exported using the one of the mongodb commands , mongodump,. Let's import the enron dataset now, we can do so using the below command:

$ mongorestore --drop enron/

The --drop option simply drops each collection of the specified database, if exists.

Note that the tree view of the exported enron dump database looks like :

enron
└── enron
    ├── messages.bson
    └── messages.metadata.json

The db is exported using the mongodump file with this command : $mongodump -d enron -o enron. We specify -o , so that the dump files exported into a folder called enron.

These are just the basic approaches. You can read more about them on the mongodb documentation.

Hope this can give you a starting point.

[MaBeuLux88]

See new import.sh script in #7 which automates everything.

[Saurabhjha1821]

I want to read large json files having size around 15gb, how can i read it through mongodb or any method, any one's help will be highly appreciated

[ikunalkumararya]

Hi @Aastha77Gupta ,

To import datasets into a MongoDB database on your local computer, you can follow these steps:

1.Install MongoDB: If you haven't already done so, you'll need to download and install MongoDB on your computer. You can find the download and installation instructions on the MongoDB website.

2.Prepare your data: Make sure that your data is in a format that MongoDB can understand. This usually means that your data is in JSON format, although MongoDB can also handle other formats like CSV or BSON.

3.Start the MongoDB server: Open a terminal window and start the MongoDB server by running the "mongod" command. This will start the MongoDB daemon process in the background.

4. Import your data: Use the "mongoimport" command to import your data into MongoDB. For example, if your data is in a file called "mydata.json" and you want to import it into a database called "mydb" and a collection called "mycollection", you can run the following command:

mongoimport --db mydb --collection mycollection --file mydata.json

This will import the data in the "mydata.json" file into the "mydb" database and the "mycollection" collection.