How to insert null in datetime type column in sql server

Question

I have a table in which there are some datetime type columns. I use a stored procedure to insert values into the table. In the stored procedure I have variables that accept null

Answer 1

In the stored procedure do something like this:

insert into table(date)
values(case when @InsertDate ='' then 
               null 
            else 
               @insertDate 
       end)