human
Schema:
item (i_id, title)
review (a_id, u_id, i_id, rating, rank)
useracct (u_id, name)
trust (source_u_id, target_u_id, trust)
Please answer with SQL.
assistant
Sure, I understand.
human
List the names of all items.
assistant
SELECT title FROM item;
human
How many did not receive any reviews?
assistant
SELECT COUNT( * ) FROM item WHERE i_id NOT IN ( SELECT i_id FROM review ) ;