มีร้านอาหารกี่แห่งในย่านเฮเซลวูด ของดัลลัส ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many restaurant are there in the Hazelwood district of Dallas ?It is not neccessary to use all the tables.
 checkin:  cid [ int]  business_id [ varchar]  count [ int]  day [ varchar] 
SELECT COUNT(DISTINCT (business.name)) FROM business, category, neighborhood WHERE business.city = 'Dallas' AND category.business_id = business.business_id AND category.category_name = 'restaurant' AND neighborhood.business_id = business.business_id AND neighborhood.neighborhood_name = 'Hazelwood'