mysql - How to get records with first letter that match one of three letters -

i retrieve records who's first letter match either a, b or c. should match whether caps or not.

example:

$sql = "select id, title tblname  first letter of title in (a, b, c) order title asc"; 

any appreciated.

thanks

select id, title tblname title regexp '^[abc]' order title asc