How many assets does each third party company supply? List the count and the company id.
CREATE TABLE Assets (supplier_company_id VARCHAR); CREATE TABLE Third_Party_Companies (company_id VARCHAR)
[SQL] SELECT COUNT(*), T1.company_id FROM Third_Party_Companies AS T1 JOIN Assets AS T2 ON T1.company_id = T2.supplier_company_id GROUP BY T1.company_id [/SQL]