How can I fill the null values with the values up these nulls

Question

How can I fill the null values with the values below these null values?

Example, I have a table like this:

Mat   Name
123   Jerry
Null  Mary
Null  Sam
45         


        

Answer 1

I think you mean

select name, max(value) OVER(ORDER BY name ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) as value