Selecting non alphabetical values from a DB

I'm using mySQL with PHP and I'm looking to pull some VARCHAR data from a database. I have a listing on my site that pulls up information by first letter based on a link someone clicks.

Example page.php?search=P

The query is something like SELECT from DB WHERE field LIKE $search ORDER BY ASC

I wanted to put a link so that I could pull out all the values that do not begin with a letter.

The idea I had was to select all data from the table, list it ascending, and stop pulling data out when the names start beginning with a letter. I have the concepts in my head but I'm not sure how to put them into code.

Anyone know what will get me goin in the right direction?

 

This could be helpfull

SELECT * from DB WHERE field NOT LIKE '$search%' ORDER BY ASC

 

SELECT field from DB WHERE NOT (field REGEXP '^[a-zA-Z]') ORDER BY ASC