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Hey, I have two columns. Ride and booking. In table booking there is the foreign key of ride. The intention is that 30-day and later bookings will be removed. If I run this query, I get the error message: mysql 1451 can not delete or update a parent row The … 
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Hello, I have make a ERD. And there is a case. Can someone look to this both? Did I forget something? Would anything else have to be done? my case is: A hotel guest can be a main guest or a travel companion. Only a major guest can book and … 
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