SCHEMA:
CREATE TABLE shop (Shop_Name VARCHAR, Shop_ID VARCHAR); CREATE TABLE stock (Shop_ID VARCHAR)
USER:
Show the name of the shop that has the most kind of devices in stock.

QUERY:
SELECT T2.Shop_Name FROM stock AS T1 JOIN shop AS T2 ON T1.Shop_ID = T2.Shop_ID GROUP BY T1.Shop_ID ORDER BY COUNT(*) DESC LIMIT 1