Simple way to import and export collections in MongoDB

A simple command will help to import and export collections in mongoDB.

Export/Dump Collections in MongoDB:

mongodump -d <database_name> -o <directory_backup>

The above command will dump all the collections in the defined directory.

eg: if your database name is awesome_db and you selected the my_db_backup as backup directory then you need run below command:

mongodump -d awesome_db -o my_db_backup

If your db has authentication enabled then pass -u <username> -p <press enter> with the above command.

Import/Restore Collection in MongoDB:

mongorestore -d <database_name> <directory_backup>

Similarly this command will restore the collections in the mongodb database. for eg:

mongodump -d awesome_db -o my_db_backup

pass the authentication -u <username> -p <press enter> if your mongodb has authentiction.

Comments

[Resolved] MySQL error code: 1175 during UPDATE in MySQL Workbench

If WHERE clause does not have primary key in UPDATE query then this error comes. If you want to run the update query without having primary key in WHERE clause of UPDATE query then below command needs to be run to disable the safe mode. SET SQL_SAFE_UPDATES = 0; It is good to run SET SQL_SAFE_UPDATES = 1; after running your UPDATE query and again enable the safe mode. Example: SET SQL_SAFE_UPDATES=0; UPDATE table_name SET col_name=1; SET SQL_SAFE_UPDATES=1;

Blockchain in Theory - Blockchain, Bitcoin, Mining

Blockchain is the software protocol that tell the Internet how to transfer money and assets. Blockchain is the layer and Bitcoin is the application. Just one of many cryptocurrency kinds of applications. When one user send email to another then both users do not have to know about the underlaying process except email address. Similarly, User don't need to know anything other than other user's wallet address to send some bitcoin or other cryptocurrencies. Any file on Internet may have multiple copies but money is something that should not be copied multiple times. This has been a longstanding problem in computing networks namely the double spend problem. Satoshi Nakamoto introduced white paper for digital cash system in 2008 to resolve the double spending problem and fortified by a ledger which enforces the money is only spent once. It took 15 years alone for corporate email as the main application to be a standard thing in our lives. And similarly the ...

How to Setup Virtual Environment in Python with venv

A virtual environment is the most used tool by the developers to isolate the dependencies for different projects. Suppose you have two projects say porj1 and proj2 . proj1 needs the Django dependency with version 3.2 but your proj2 needs the Django dependency with version 2.2. In this situation you need a virtual environment to keep the both version on your system separately. How to create virtual environment in python: Decide a directory where you want to create the virtual environment. You can use your project directory or any other directory as per your wish. Run the below command. Here` awesome_proj_env ` is the folder where virtual environment will be created. if the folder does not exists then it will be created automatically. python3 -m venv awesome_proj_env Activate the virtual environment: On Linux/Mac OSX: source awesome_proj_env/bin/activate On Windows: awesome_proj_env \Scripts\activate.bat Deactivate the virtual environment in Pyth...

Short Technical Notes

Search This Blog