Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE staff (staff_name VARCHAR, staff_id VARCHAR)
TABLE: CREATE TABLE staff_department_assignments (staff_id VARCHAR)

### Question ###
List the name of staff who has been assigned multiple jobs.

### Accurate SQL ###

SELECT T1.staff_name FROM staff AS T1 JOIN staff_department_assignments AS T2 ON T1.staff_id = T2.staff_id GROUP BY T2.staff_id HAVING COUNT(*) > 1