I want to make one row with unique key with all his data

I want to make one row with unique key with all his data

Occurrences of each weekday for a specific month in conjunction to a text of another column

We need to count how many Mondays, Tuesdays etc. on a specific month have a specific letter at the next column. e.g How many Sundays of March 2024 have the letter “π” in the column B? (The result should be 1)

Force LibreOffice to keep a specified number of decimals (not just hide them)

I want LibreOffice Calc to round all numbers to only n decimals.