Describes the cause and action for error messages.
Error Message(English)：
count if missing value
Excel formula: Find missing values | Exceljet
https://exceljet.net/formula/find-missing-values
Excel video: How to find missing values with COUNTIF | Exceljet
https://exceljet.net/tips/how-to-find-missing-values-with-countif
Excel Formula: How to find missing values in Excel - Excelchat - Got-it.ai
https://www.got-it.ai/solutions/excel-chat/excel-tutorial/lookup/find-missing-values
How to find missing values with COUNTIF ? Advanced Excel Tips ...
https://quadexcel.com/how-to-find-missing-values-with-countif/
Find missing data with if and countif functions in Excel - YouTube
https://www.youtube.com/watch?v=5bEUk0nQsf0
https://www.youtube.com/watch?v=5bEUk0nQsf0
How to find missing values with COUNTIF - YouTube
https://www.youtube.com/watch?v=Z3ox408Niu0
https://www.youtube.com/watch?v=Z3ox408Niu0
Highlighting Cells with Missing Values in Excel - YouTube
https://www.youtube.com/watch?v=3Gnm6b9WxbY