# How to Rename a Database in MongoDB? - 面试题

MongoDB does not provide a direct command or method to rename the entire database. To rename the database, follow these steps:

Export the existing database: Use the mongodump command to export the database you want to rename.
```
bash
mongodump --db original_database_name --out /path/to/dump/
```
Import data into a new database: Use the mongorestore command to import the exported data into the new database.
```
bash
mongorestore --db new_database_name /path/to/dump/original_database_name
```
Verify the data: Confirm that the data in the new database is complete.
Delete the old database: If the data in the new database is verified to be correct, you can delete the old database.
```
bash
mongo
> use original_database_name
> db.dropDatabase();
```

This completes the database renaming process. Note that this process involves exporting and importing data, which may impact production environment performance. It is recommended to perform this operation during off-peak hours. Additionally, ensure that complete data backups are taken before and after the operation.