SELECT product_type_code FROM products GROUP BY product_type_code HAVING count(*)  >=  2
SELECT product_type_code FROM products GROUP BY product_type_code HAVING count(*)  >=  2 <table_name> : Products col : product_id | product_type_code | product_name | product_price row 1 : 1 | Hardware | Apple | 54753982.574522 row 2 : 2 | Clothes | jcrew | 30590929.528306 row 3 : 3 | Hardware | Apple | 10268.85297069 row 4 : 4 | Hardware | Apple | 22956668.699482 row 5 : 5 | Clothes | jcrew | 5927021.8748021 row 6 : 6 | Hardware | Apple | 77.1099611475 row 7 : 7 | Hardware | Apple | 450.392325205 row 8 : 8 | Hardware | Sony | 4446237.9177554 row 9 : 9 | Clothes | jcrew | 622.7927598449 row 10 : 10 | Hardware | Sony | 7171.5933353284 row 11 : 11 | Clothes | jcrew | 149.9551907694 row 12 : 12 | Clothes | gucci | 593.8051992998 row 13 : 13 | Clothes | gucci | 11388.26282462 row 14 : 14 | Hardware | Sony | 389.9154264433 row 15 : 15 | Clothes | gucci | 310488248.48788
col : product_type_code row 1 : Clothes row 2 : Hardware