Find the number of items that did not receive any review.
CREATE TABLE review (i_id VARCHAR); CREATE TABLE item (i_id VARCHAR)
SELECT COUNT(*) FROM item WHERE NOT i_id IN (SELECT i_id FROM review)
### Context: CREATE TABLE review (i_id VARCHAR); CREATE TABLE item (i_id VARCHAR) ### Question: Find the number of items that did not receive any review. ### Answer: SELECT COUNT(*) FROM item WHERE NOT i_id IN (SELECT i_id FROM review)