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)

What is maximum and minimum RAM size of phone produced by company named 'Nokia Corporation'?
SELECT MAX(T1.ram_mib), MIN(T1.ram_mib) FROM chip_model AS T1 JOIN phone AS T2 ON T1.model_name = T2.chip_model WHERE T2.company_name = "Nokia Corporation"
SELECT MAX("T1"."ram_mib"), MIN("T1"."ram_mib") FROM "chip_model" AS "T1" JOIN "phone" AS "T2" ON "Nokia Corporation" = "T2"."company_name" AND "T1"."model_name" = "T2"."chip_model"