db SELECT in concrete place

[eluser]Josssi[/eluser]
Hi people,

I am solving now one DB functionality in my application. In one module of application I need to create new item and store it to the database. My problem is, that i need to store them in concrete place. For example my database will contain some people:

ID FIRST LAST
1.Silvester Stalone
2.Sherlock Holmes
3.Christina Boccati

And now in my application I want to add NEW PERSON, but i need to give it before Sherlock. Is it possible to make this select? How can I place new value between two other??? Can you help me somebody pls?