the basics are:
// CONNECT TO DATABASE //
$db_con = mysql_connect($DBHOST, $DBLOGIN, $DBPASS)
OR warnadmin( 'DB Connect: ' . mysql_error());
$db_select = mysql_select_db($DBNAME)
OR warnadmin( "DB Select: {$DBNAME}: ". mysql_error());
// END OF DATABASE CONNECTION //
//Run the query
$sql = 'select id, name from mytablename where id = ' . $cid;
$result = @mysql_query($sql);
while($row = mysql_fetch_array($result))
{
echo $row['id'] . ' - ' . $row['name'];
}
mysql_free_result($result);
but I'd check some of the tutorials and have a play before doing any real life stuff.