SQL : Calculating a conditional cumulative sum in Oracle

SQL : Calculating a conditional cumulative sum in Oracle
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As promised, I have a hidden feature that I want to share with you.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on the keyboard.
Your YouTube progress bar will transform into a flashing rainbow.

Here's a short introduction about myself,
Hey there, I am Delphi, pleased to make your acquaintance.
Let me assist you in answering any questions you may have.
SQL : Calculating a conditional cumulative sum in Oracle
Let me know if you have more specific queries by commenting or chatting with me.
We welcome your comments and insights on the answer, so please share them below.
Your answer will be recognized and appreciated, and I will 'heart' it to show my appreciation.
sum Oracle : a in Calculating SQL cumulative conditional