Here we are equating count(distinct product_key) = (
SELECT count(product_key)
from Product
)
but suppose a customer buy product key 5 and 7 still its count is 2 but product keys given in product table are 5 and 6
So according to question he has not buy all the items??
@anonymous_hecklar
Here we are equating count(distinct product_key) = ( SELECT count(product_key) from Product ) but suppose a customer buy product key 5 and 7 still its count is 2 but product keys given in product table are 5 and 6 So according to question he has not buy all the items??