How to Hide Coloum in Table Visualizations to Make ToolTip

Hi Anonymous 

I just tested in my side, it works fine. 

You can create the tooltip and add the HOURS column to the filed

and then every time you hover your mouse on the column, the tooltip displaying like below:) (No relates to the holiday column, you can unselect it in the table visual)

Hi Anonymous 

Let me explain more, the default tooltip won't work in your scenario, but you can create a custom tooltip instead.

First, I've created a sample like below:

Then I created a custom tooltip in page 2 following this article:https://docs.microsoft.com/en-us/power-bi/desktop-custom-tooltips

That means my tooltip will show these 3 columns info.

Note that I added Date column in the filed, that every time you hover on the date column the tooltip appeared:

Then turn on the tooltip in the original page and select the tooltip page:

Finally, the result shows as expected:

Pbix attached.