Zend certified PHP/Magento developer

Import .gz mysql export file from Production Magento2 Cloud to Stage Magento2 Cloud

I have a Magento2.4 commerce cloud and I need to dump the existing staging website database and then take an existing database dump I just made which is on production. var folder and get it imported into the Magento2 commerce cloud database.

I see a lot of posts talking about dumping a database but not alow of detail specifically on getting a commerce cloud database emptied and then importing a production database and then changing the base url etc in the database.

Any videos or tutorials anyone knows of?