CREATE TABLE Participants (Participant_ID INT, Participant_Type_Code CHAR, Participant_Details VARCHAR)
CREATE TABLE Services (Service_ID INT, Service_Type_Code CHAR)
CREATE TABLE Events (Event_ID INT, Service_ID INT, Event_Details VARCHAR)
CREATE TABLE Participants_in_Events (Event_ID INT, Participant_ID INT)

Compare the number of participants in each participant type code using a bar chart, order from low to high by the X-axis please.
SELECT Participant_Type_Code, COUNT(Participant_Type_Code) FROM Participants GROUP BY Participant_Type_Code ORDER BY Participant_Type_Code
SELECT "Participant_Type_Code", COUNT("Participant_Type_Code") FROM "Participants" GROUP BY "Participant_Type_Code" ORDER BY "Participant_Type_Code" NULLS FIRST