How to get the byte size of resultset in an SQL query?

Question

Is it possible to get the size in bytes of the results of an sql query in MySQL?

For example:

select * from sometable;

ths returns

Answer 1

simplify :

select sum(char_length(column1)+
    char_length(column2)+
    char_length(column3)+
    char_length(column4) ... )<-- repeat for all columns
   from your_table

You need to add IFNULL() to each column as @futilerebel has mentioned