List the software platform shared by the greatest number of devices.
select software_platform from device group by software_platform order by count ( * ) desc limit 1
How many devices from the list use the Android platform?
select count ( * ) from device where software_platform = "Android"
And how many devices from the list use the iOS platform?
select count ( * ) from device where software_platform = "iOS"
Could you please list the devices that use the Android platform?
select device from device where software_platform = "Android"
How many different carriers are there on the list?
select count ( distinct carrier ) from device
What is the carrier for the Samsung device?
select carrier from device where device = "Samsung"