CREATE TABLE technician (Name VARCHAR2, technician_ID VARCHAR2)
CREATE TABLE repair_assignment (technician_ID VARCHAR2)

Show names of technicians and the number of machines they are assigned to repair.
SELECT T2.Name, COUNT(*) FROM repair_assignment AS T1 JOIN technician AS T2 ON T1.technician_ID = T2.technician_ID GROUP BY T2.Name
SELECT "T2"."Name", COUNT(*) FROM "repair_assignment" "T1" JOIN "technician" "T2" ON "T1"."technician_ID" = "T2"."technician_ID" GROUP BY "T2"."Name"