thongtd

/* (320x480) iPhone (Original, 3G, 3GS) */
@media only screen and (min-device-width: 320px) and (max-device-width: 480px) {
    /* insert styles here */
}
 
/* (320x480) Smartphone, Portrait */
@media only screen and (device-width: 320px) and (orientation: portrait) {
    /* insert styles here */
}
 

thongtd

set serveroutput on;

declare
  raw_guid raw(16);
  guid varchar2(64);
begin
  
  raw_guid := guid_to_raw ('88c6a267-65d2-48d6-8da2-6f45e2c22726');
  guid := raw_to_guid('67A2C688D265D6488DA26F45E2C22726');