CREATE TABLE performance (Date VARCHAR(255), Performance_ID VARCHAR(255)); CREATE TABLE member (Member_ID VARCHAR(255), Role VARCHAR(255)); CREATE TABLE member_attendance (Member_ID VARCHAR(255), Performance_ID VARCHAR(255))
Show the dates of performances with attending members whose roles are "Violin".
    
SQL: SELECT T3.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"