CREATE TABLE category (id NUMBER, business_id VARCHAR2, category_name VARCHAR2)
CREATE TABLE neighborhood (id NUMBER, business_id VARCHAR2, neighborhood_name VARCHAR2)
CREATE TABLE tip (tip_id NUMBER, business_id VARCHAR2, text TEXT, user_id VARCHAR2, likes NUMBER, year NUMBER, month VARCHAR2)
CREATE TABLE review (rid NUMBER, business_id VARCHAR2, user_id VARCHAR2, rating FLOAT, text TEXT, year NUMBER, month VARCHAR2)
CREATE TABLE user (uid NUMBER, user_id VARCHAR2, name VARCHAR2)
CREATE TABLE business (bid NUMBER, business_id VARCHAR2, name VARCHAR2, full_address VARCHAR2, city VARCHAR2, latitude VARCHAR2, longitude VARCHAR2, review_count NUMBER, is_open NUMBER, rating FLOAT, state VARCHAR2)
CREATE TABLE checkin (cid NUMBER, business_id VARCHAR2, count NUMBER, day VARCHAR2)

Find the total checkins in ' Brighton Heights ' neighborhood
SELECT SUM(checkin.count) FROM business, checkin, neighborhood WHERE checkin.business_id = business.business_id AND neighborhood.business_id = business.business_id AND neighborhood.neighborhood_name = 'Brighton Heights'
SELECT SUM("checkin"."count") FROM "business" JOIN "checkin" ON "business"."business_id" = "checkin"."business_id" JOIN "neighborhood" ON "business"."business_id" = "neighborhood"."business_id" AND "neighborhood"."neighborhood_name" = 'Brighton Heights'