what are the names of the districts where both city mall and village store type stores.
SELECT t3.District_name FROM store AS t1 JOIN store_district AS t2 ON t1.store_id  =  t2.store_id JOIN district AS t3 ON t2.district_id  =  t3.district_id WHERE t1.Type  =  "City Mall" INTERSECT SELECT t3.District_name FROM store AS t1 JOIN store_district AS t2 ON t1.store_id  =  t2.store_id JOIN district AS t3 ON t2.district_id  =  t3.district_id WHERE t1.Type  =  "Village Store"
districts where both certain types of stores are located = INTERSECT between two SELECT queries for each store type; names of districts = District_name; store types are specified = 'City Mall' and 'Village Store';