Fastest way to update price from another database

Hey,

We just migrated our magento store from 1.9 to 2.4 version, but in the process not all the prices have been imported correctly. We have a relatively huge database (more than 2.5M product, its a bookstore). Of course I can do it by running a simple sql query, but I was wondering if there’s a fastest way to accomplish this task.

Thanks