CREATE TABLE Services (Service_Type_Code VARCHAR2, Product_Price NUMBER)
CREATE TABLE Ref_Service_Types (Service_Type_Description VARCHAR2, Service_Type_Code VARCHAR2)

What are the descriptions of the service types with product price above 100?
SELECT T1.Service_Type_Description FROM Ref_Service_Types AS T1 JOIN Services AS T2 ON T1.Service_Type_Code = T2.Service_Type_Code WHERE T2.Product_Price > 100
SELECT "T1"."Service_Type_Description" FROM "Ref_Service_Types" "T1" JOIN "Services" "T2" ON "T1"."Service_Type_Code" = "T2"."Service_Type_Code" AND "T2"."Product_Price" > 100