MySql with HP-UX

Hello,
I'm trying to use a simple mysql query using the where option.  I looked at a manual that I have and I can't this statement to work.  I wonder if there is some setting I am missing.
This statement works; select service from XXXinstances where service='XXX_3';
There are many of each X types.  There are X_1, XX_2, and XXXX_4, etc.
I'm trying to use a wide card %, like this;
select service from XXXinstances where service='%_3';
To select all of the _3 types/services.
Why does this not work?