CREATE TABLE member_attendance (Member_ID INT, Performance_ID INT, Num_of_Pieces INT)
CREATE TABLE performance (Performance_ID FLOAT, Date TEXT, Host TEXT, Location TEXT, Attendance INT)
CREATE TABLE member (Member_ID TEXT, Name TEXT, Nationality TEXT, Role TEXT)

A bar chart for showing the number of the dates of performances with attending members whose roles are 'Violin', could you list how many date in asc order please?
SELECT Date, COUNT(Date) FROM member_attendance AS T1 JOIN member AS T2 ON T1.Member_ID = T2.Member_ID JOIN performance AS T3 ON T1.Performance_ID = T3.Performance_ID WHERE T2.Role = "Violin" GROUP BY Date ORDER BY COUNT(Date)
SELECT "Date", COUNT("Date") FROM "member_attendance" AS "T1" JOIN "member" AS "T2" ON "T1"."Member_ID" = "T2"."Member_ID" AND "T2"."Role" = "Violin" JOIN "performance" AS "T3" ON "T1"."Performance_ID" = "T3"."Performance_ID" GROUP BY "Date" ORDER BY COUNT("Date") NULLS FIRST