CREATE TABLE technician (technician_id FLOAT, Name CLOB, Team CLOB, Starting_Year FLOAT, Age NUMBER)
CREATE TABLE machine (Machine_ID NUMBER, Making_Year NUMBER, Class CLOB, Team CLOB, Machine_series CLOB, value_points FLOAT, quality_rank NUMBER)
CREATE TABLE repair (repair_ID NUMBER, name CLOB, Launch_Date CLOB, Notes CLOB)
CREATE TABLE repair_assignment (technician_id NUMBER, repair_ID NUMBER, Machine_ID NUMBER)

A bar chart for listing the number of the names of technicians in ascending order of age.
SELECT Name, COUNT(Name) FROM technician GROUP BY Name ORDER BY Age
SELECT "Name", COUNT("Name") FROM "technician" GROUP BY "Name" ORDER BY "Age"