CREATE TABLE screen_mode (graphics_mode DECIMAL, char_cells TEXT, pixels TEXT, hardware_colours DECIMAL, used_kb DECIMAL, map TEXT, type TEXT)
CREATE TABLE chip_model (model_name TEXT, launch_year DECIMAL, ram_mib DECIMAL, rom_mib DECIMAL, slots TEXT, wifi TEXT, bluetooth TEXT)
CREATE TABLE phone (company_name TEXT, hardware_model_name TEXT, accreditation_type TEXT, accreditation_level TEXT, date TEXT, chip_model TEXT, screen_mode TEXT)

Find the name of the company that has the least number of phone models. List the company name and the number of phone model produced by that company.
SELECT company_name, COUNT(*) FROM phone GROUP BY company_name ORDER BY COUNT(*) LIMIT 1
SELECT "company_name", COUNT(*) FROM "phone" GROUP BY "company_name" ORDER BY COUNT(*) NULLS FIRST LIMIT 1