CREATE TABLE submission (Author VARCHAR(255), Submission_ID VARCHAR(255)); CREATE TABLE acceptance (workshop_id VARCHAR(255), Submission_ID VARCHAR(255))
Show each author and the number of workshops they submitted to.
    
SQL: SELECT T2.Author, COUNT(DISTINCT T1.workshop_id) FROM acceptance AS T1 JOIN submission AS T2 ON T1.Submission_ID = T2.Submission_ID GROUP BY T2.Author