Design a schema for a part of a package delivery company, which contains information about packages (PkgId, AddresseeId), addressees (Id, Name, StreetNumber, StreetName, City), and streets (StreetName, City, MinHouseNumber, MaxHouseNumber). Show the primary and foreign keys. Indicate the NOT NULL constraint wherever applicable.
What will be an ideal response?
CREATE TABLE Package (
PkgId INTEGER,
AddresseeId CHAR(20) NOT NULL,
PRIMARY KEY (PkgId)
FOREIGN KEY (AddresseeId) REFERENCES Addressee (Id)
)
CREATE TABLE Addressee (
Id CHAR(20),
Name CHAR(20) NOT NULL,
StreetNumber INTEGER NOT NULL,
StreetName CHAR(40) NOT NULL,
City CHAR(20) NOT NULL,
PRIMARY KEY (Id)
FOREIGN KEY (StreetName,City) REFERENCES Streets
)
CREATE TABLE Streets (
StreetName CHAR(40),
City CHAR(20),
MinHouseNumber INTEGER NOT NULL,
MaxHouseNumber INTEGER NOT NULL,
PRIMARY KEY (StreetName, City)
)
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