How To Check If Two Or More Rows Have The Same Field Value ?

you want to filter details from db.

The Problem :

I want to select the first row with the last name "usama" and then I want to skip the next row which has the same field "usama".

how to start PHP / Mysql Connection

here is a simple connection between php and mysql. in 5 steps .

Step 1: 

create the db 

CREATE DATABASE `mydb`;
USE `mydb`;
CREATE TABLE `employee` (
   `id` int UNIQUE NOT NULL AUTO_INCREMENT,

   `first_name` varchar(40),
   `last_name` varchar(50),
   PRIMARY KEY(id)
);
INSERT INTO cars VALUES('usama','saad');
INSERT INTO cars VALUES('hasan','hamaky');
INSERT INTO cars VALUES('noor','sobhy');