It's not totally clear how you want to see the results. The following queries give you a count of NULLs in each column, for all rows in the table:
declare @Rows int
select @Rows = count(1)
select Col1Nulls = (@Rows - count(Col1))
,Col2Nulls = (@Rows - count(Col2))
If that's not what you need, please read the link in my signature and provide DDL, sample data and desired results.
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