CREATE TABLE district (district_id NUMBER, district_name CLOB, headquartered_city CLOB, city_population NUMBER, city_area NUMBER)
CREATE TABLE store_product (store_id NUMBER, product_id NUMBER)
CREATE TABLE store_district (store_id NUMBER, district_id NUMBER)
CREATE TABLE store (store_id NUMBER, store_name CLOB, type CLOB, area_size NUMBER, number_of_product_category NUMBER, ranking NUMBER)
CREATE TABLE product (product_id NUMBER, product CLOB, dimensions CLOB, dpi NUMBER, pages_per_minute_color NUMBER, max_page_size CLOB, interface CLOB)

Find all the stores in the district with the most population.
SELECT t1.store_name FROM store AS t1 JOIN store_district AS t2 ON t1.store_id = t2.store_id WHERE district_id = (SELECT district_id FROM district ORDER BY city_population DESC LIMIT 1)
SELECT "t1"."store_name" FROM "store" "t1" JOIN "store_district" "t2" ON "t1"."store_id" = "t2"."store_id" WHERE "district_id" = (SELECT "district_id" FROM "district" ORDER BY "city_population" DESC FETCH FIRST 1 ROWS ONLY)