Sorted:

How to view databases in MySQL?

How to back up MySQL databases in Linux?

How do I query the size of data in a table in MySQL?

How can I check the size and usage of a table in Oracle?

How can you export a dmp file in PLSQL?

How can Oracle export a large amount of data to a text file?

How can large amounts of data be exported to a CSV file in PL/SQL?

How to resolve the issue of invalid usage with oracle wm_concat?

What is the usage of Oracle’s WM_CONCAT function?

How can I export all tables from a database using PL/SQL?