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 table_1566852_4 ( interview_subject VARCHAR )

### Question ###
Who was featured in 20 questions when the subject of the interview was Mike Piazza?

### Accurate SQL ###

SELECT 20 AS _questions FROM table_1566852_4 WHERE interview_subject = "Mike Piazza"