Certainly! Below is the README content for your MongoDB cheatsheet repository:

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MongoDB Cheatsheet

A handy cheatsheet for MongoDB users to reference basic and advanced commands without the need to search for each command online.

MongoDB Shell Cheatsheet

Basic Commands

1. Start MongoDB Shell:

   mongo
   

2. View Databases:

   show dbs
   

3. Switch Database:

   use mydatabase
   

4. View Collections in Current Database:

   show collections
   

5. Create Database:

   use mydatabase
   

6. Create Collection:

   db.createCollection("mycollection")
   

7. Insert Document into Collection:

   db.mycollection.insertOne({ key: "value" })
   

8. Find Documents in Collection:

   db.mycollection.find()
   

9. Update Document in Collection:

   db.mycollection.updateOne({ key: "value" }, { $set: { key: "new value" } })
   

10. Remove Document from Collection:

    db.mycollection.deleteOne({ key: "value" })
    

11. Drop Collection:

    db.mycollection.drop()
    

12. Drop Database:

    use mydatabase
    db.dropDatabase()
    

Advanced Commands

13. Index Management:

    • Create Index: db.mycollection.createIndex({ key: 1 })
    • List Indexes: db.mycollection.getIndexes()
    • Drop Index: db.mycollection.dropIndex("indexName")

14. Aggregation Framework:

    db.mycollection.aggregate([...])
    

15. Data Import and Export:

    • Import Data from JSON: mongoimport --db mydatabase --collection mycollection --file data.json
    • Export Data to JSON: mongoexport --db mydatabase --collection mycollection --out data.json

16. User Management:

    • Create User: db.createUser({ user: "username", pwd: "password", roles: ["readWrite"] })
    • List Users: db.getUsers()
    • Drop User: db.dropUser("username")

17. Replica Sets and Sharding:

    • Initialize Replica Set: rs.initiate()
    • Add Replica Set Member: rs.add("hostname:port")
    • Enable Sharding on Database: sh.enableSharding("mydatabase")
    • Shard Collection: sh.shardCollection("mydatabase.mycollection", { shardKey: 1 })

18. Server Administration:

    • Server Status: db.serverStatus()
    • Current Operations: db.currentOp()
    • Server Logs: db.getLog("global")

Feel free to copy and paste these commands into your MongoDB terminal for quick reference!

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You can copy the content and save it into your README.md file in your MongoDB cheatsheet repository. This will provide users with an easy-to-access reference for MongoDB commands.