How to count instances of character in SQL Column

Question

I have an sql column that is a string of 100 \'Y\' or \'N\' characters. For example:

YYNYNYYNNNYYNY...

What is the easiest way

Answer 1

This will return number of occurance of N

select ColumnName, LEN(ColumnName)- LEN(REPLACE(ColumnName, 'N', '')) from Table