How to use the –eval Flag In Databases
- The simplest way to execute MongoDB commands through a shell script is by the –eval flag.
- This way we can write JavaScript code and make it run in Mongo shell.
Consider the following example
#!/bin/bash
# Execute a MongoDB command using --eval
mongo --eval 'db.collection.find({})'
Explanation: In this query, the Mongo command is invoked with the –eval flag followed by the JavaScript code to execute. The code db.collection.find({}) queries all documents from a specified collection. Upon execution, the script connects to the MongoDB instance and retrieves the desired data.
How to Execute Mongo Commands Through Shell Scripts?
Database management is a difficult field and MongoDB is a useful NoSQL database in this area. Automation of tasks through shell scripts is the way of effectively utilizing the abilities of a shell program.
In this article, we will learn about How to execute MongoMongo commands through shell scripts by understanding various approaches with the help of examples and so on.