CREATE TABLE shop (shop_id NUMBER, shop_name CLOB, location CLOB, open_date CLOB, open_year NUMBER)
CREATE TABLE device (device_id NUMBER, device CLOB, carrier CLOB, package_version CLOB, applications CLOB, software_platform CLOB)
CREATE TABLE stock (shop_id NUMBER, device_id NUMBER, quantity NUMBER)

How many devices are there?
SELECT COUNT(*) FROM device
SELECT COUNT(*) FROM "device"