Schema: CREATE TABLE submission (Author VARCHAR, Submission_ID VARCHAR); CREATE TABLE acceptance (workshop_id VARCHAR, Submission_ID VARCHAR)
Question: 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