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 manufacturers ( code number, name text, headquarter text, founder text, revenue number )
TABLE: CREATE TABLE products ( code number, name text, price number, manufacturer number )

### Question ###
Find number of products which Sony does not make.

### Accurate SQL ###

SELECT COUNT(DISTINCT name) FROM products WHERE NOT name IN (SELECT T1.name FROM products AS T1 JOIN manufacturers AS T2 ON T1.manufacturer = T2.code WHERE T2.name = 'Sony')