Beginning SQL

FOREIGN KEY (OrderId)
REFERENCES Orders(OrderId),
CONSTRAINT Films_FK
FOREIGN KEY (FilmId)
REFERENCES Films(FilmId),
CONSTRAINT OrderItems_PK PRIMARY KEY (OrderId, FilmId)
);
You need to execute this SQL against the database before continuing with the chapter. As well as creating
the tables, also notice that primary keys and foreign keys are specified where appropriate. For example,
MemberId in the Orders table is actually taken from the MemberId in the MemberDetails table — it’s
a foreign key. Therefore, a foreign key relationship is specified between MemberId in the Orders and
MemberDetails tables to ensure that no invalid data is entered.
You also need to add some salesperson data to the SalesPerson table:
INSERT INTO SalesPerson(SalesPersonId, FirstName, LastName)
VALUES (1,’Sandra’,’Hugson’);
INSERT INTO SalesPerson(SalesPersonId, FirstName, LastName)
VALUES (2,’Frasier’,’Crane’);
INSERT INTO SalesPerson(SalesPersonId, FirstName, LastName)
VALUES (3,’Daphne’,’Moon’);
Likewise, you need to add some Orders and OrderItems. Again, you can save a whole lot of typing by
downloading the following code from www.wrox.com. Remember, if you’re using Oracle, you need to
change the date format for the OrderDate column to day-month_name-year
INSERT INTO Orders(OrderId, MemberId, SalesPersonId, OrderDate)
VALUES (10,7,1,’2006-07-30’);
INSERT INTO OrderItems(OrderId,FilmId) Values (10,4);
INSERT INTO OrderItems(OrderId,FilmId) Values (10,8);
INSERT INTO Orders(OrderId, MemberId, SalesPersonId, OrderDate)
VALUES (11,4,1,’2006-08-06’);
INSERT INTO OrderItems(OrderId,FilmId) Values (11,13);
INSERT INTO Orders(OrderId, MemberId, SalesPersonId, OrderDate)
VALUES (12,6,1, ‘2006-08-18’);
INSERT INTO OrderItems(OrderId,FilmId) Values (12,9);
INSERT INTO OrderItems(OrderId,FilmId) Values (12,8);
INSERT INTO Orders(OrderId, MemberId, SalesPersonId, OrderDate)
VALUES (13,4,1,’2006-09-29’);
INSERT INTO OrderItems(OrderId,FilmId) Values (13,12);
Advanced Queries
265