CREATE TABLE Timed_Locations_of_Things (Location_Code VARCHAR2, thing_id VARCHAR2)
CREATE TABLE Things (thing_id VARCHAR2, service_details VARCHAR2)

How many distinct locations have the things with service detail 'Unsatisfied' been located in?
SELECT COUNT(DISTINCT T2.Location_Code) FROM Things AS T1 JOIN Timed_Locations_of_Things AS T2 ON T1.thing_id = T2.thing_id WHERE T1.service_details = 'Unsatisfied'
SELECT COUNT(DISTINCT "T2"."Location_Code") FROM "Things" "T1" JOIN "Timed_Locations_of_Things" "T2" ON "T1"."thing_id" = "T2"."thing_id" WHERE "T1"."service_details" = 'Unsatisfied'