There are very few options but i can give some suggestions:
1.Say your query is:
Select lastname from emp;
If you have length of column lastname as varchar(120), but lastname can be at the most of 30 bytes length, so you can modify the query as:
Select char(lastname,30) from emp;
This will truncate your additional space. Similarly for a double column you can use integer.
2. You can also save the data in form of csv and view it in excel.
Select * from emp > emp.csv