i need a query to select most expensive product for every maker [duplicate]

问题

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select most expensive PC without CD drive for makers who manufacture only PCs [closed]

Closed last month.

the query that i tried is this i try to use a inner join

Select l.model,l.price,p.model,p.price
from LAPTOP l Inner Join PRINTER p ON  (l.model = p.model)
Where Price IN (Select Max (Price) from Product)

i got this output

column ambiguously defined

so my tables are this

                                              *Laptop*
SERIAL_NUMBER   MODEL   PRICE   SPEED   RAM HD  SCREEN

                                              *Printer*
PRICE  MODEL   COLOR   TYPE
                                              *Product*
MODEL   MAKER   TYPE

来源：https://stackoverflow.com/questions/64638066/i-need-a-query-to-select-most-expensive-product-for-every-maker