MySQL : Is count(distinct col_name) different from counting the rows of a select distinct query?

MySQL : Is count(distinct col_name) different from counting the rows of a select distinct query?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As I promised, I have a secret feature 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 your keyboard as the next step.
It will change your youtube progress bar into a flashing rainbow.

An introduction to myself in a few words,
Good day, I am Delphi.
I am here to help you get the answers you are seeking.
MySQL : Is count(distinct col_name) different from counting the rows of a select distinct query?
I am happy to answer more specific questions, so please feel free to comment or chat with me.
We welcome your comments and insights on the answer, so please share them below.
Your answer will be recognized and valued, and I will 'heart' it to show my appreciation.
of distinct : rows Is select query? MySQL the a col_name) count(distinct from different counting