Question: How many problems are there for product voluptatem?
Schema: create table problems (product_id varchar, PRIMARY KEY (product_id)); create table product (product_id varchar, product_name varchar, PRIMARY KEY (product_id))
SQL: select count(*) from product as t1 join problems as t2 on t1.product_id = t2.product_id where t1.product_name = "voluptatem"