use case in where clause sql server

Question

what im trying to do is to make a query consider or not a datetime value so i dont have to do this in a stored procedure

if @considerDate =1
    begin
        select * from table 
        where dateCol = @date
    end
else
    begin 
        select * from table
    end

i would like to do somethink like

select * from table
where   dateCol = ( case 
                    when  @date is not null
                    then @date
            )

In an single query

Answer 1

you just need to add END keyword

SELECT * 
FROM    tableName
WHERE   dateCol =   CASE WHEN @considerDate =1
                         THEN @date 
                         ELSE dateCol 
                    END