1. RELATIONAL DATABASES AND XML
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2. Objectives Compare the following data storage technologies:
Describe a relational database.
Describe XML.
Write a program that accesses data from a relational database.
Design relational database tables.
Use Structured Query Language (SQL)
Access a database from Visual Basic .NET
Access a database using Java Database Connectivity (JDBC)
Write a program that accesses data from an XML file.
Create an XML document.
Identify the .NET XML classes
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3. Tables and Relationships
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4. One-To-One Relationships
Almost always expressed as an attribute of a table.
Customer 1
FirstName 1
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5. One-To-Many Relationships
A table has 0, 1, or many related records
Usually expressed through a foreign key relationship
Primary key is on the “one” side of the relationship.
Order1 FK
Order2
Customer FK PK
Customer3 FK
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6. Many-to-Many Relationships
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7. Data Access Classes for Bound Controls
SqlConnection
Defines connection
SqlDataAdapter
Retrieves data from the database
DataSet
Stores the data
DataGrid
Bound control
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8. Data Bound Controls 12/3/2018© 2006 ITT Educational Services Inc.
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9. Updating Data 12/3/2018© 2006 ITT Educational Services Inc.
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10. Deleting Records 12/3/2018© 2006 ITT Educational Services Inc.
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11. Validating Data 12/3/2018© 2006 ITT Educational Services Inc.
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12. SELECT results SELECT FirstName, LastName FROM tblCustomer
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13. SELECT with Where Clause
SELECT FirstName, LastName, City, State
FROM tblCustomer
WHERE State = 'CO' OR State = 'CA'
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14. SELECT with BETWEEN SELECT * FROM tblOrder
WHERE OrderDate BETWEEN '1/4/2001' an '6/5/2001'
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15. SELECT With LIKE SELECT * FROM tblCustomer WHERE FirstName LIKE 'J%'
Wildcard characters * ? % _
[a-m]%
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16. SELECT With IN SELECT FirstName, LastName, State FROM tblCustomer
WHERE State IN ('CO','WI')
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17. ORDER BY SELECT * FROM tblOrder ORDER BY OrderDate Desc SELECT TOP 3 *
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18. JOINS SELECT FirstName, LastName, OrderDate FROM tblOrder
INNER JOIN tblCustomer
ON tblOrder.CustomerID = tblCustomer.ID
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19. Data Returned by Join 12/3/2018© 2006 ITT Educational Services Inc.
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20. Aggregates
SELECT tblOrder.CustomerID, FirstName, LastName, COUNT(dbo.tblOrder.CustomerID) AS TotalOrders
FROM tblOrder INNER JOIN tblCustomer
ON tblOrder.CustomerID = tblCustomer.ID
GROUP BY FirstName, LastName, CustomerID
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21. Results of Previous Query
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22. HAVING
SELECT tblOrder.CustomerID, FirstName, LastName, COUNT(dbo.tblOrder.CustomerID) AS TotalOrders
FROM tblOrder INNER JOIN tblCustomer
ON tblOrder.CustomerID = tblCustomer.ID
GROUP BY FirstName, LastName, CustomerID
HAVING (COUNT(tblOrder.CustomerID) > 1
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23. Aggregate Functions 12/3/2018© 2006 ITT Educational Services Inc.
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24. UPDATE UPDATE tblItem SET Price = Price * 1.1 UPATE tblInventory
WHERE RetailPrice > 100
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25. DELETE DELETE * FROM tblOrder WHERE OrderDate < '10/31/98'
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26. INSERT INSERT INTO tblOrder (CustomerID, OrderDate)
VALUES (119, '6/16/2001')
INSERT INTO tblOrderArchive
SELECT * FROM tblOrder
WHERE OrderDate < #6/1/2001#
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27. XML Element with Subelements
<Person firstName="John" lastName="Doe" address1="123 Main Street"
address2 = "' '"
city="Sometown"
state="OH"  
zip="22222"
phone=" ">
            <orders>
                        <order id="111"
                                    itemid="2923"
                                    itemdesc="Super Foo Widget">
                        </order>
            </orders>
</Person>
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28. XML/XSL Hierarchy 12/3/2018© 2006 ITT Educational Services Inc.
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29. XML and XSL Example 12/3/2018© 2006 ITT Educational Services Inc.
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30. XML Classes in VB.NET xmlNode xmlNodeList xmlDocument
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31. Summary In this unit the students learned to:
Compare the following data storage technologies:
Describe a relational database.
Describe XML.
Write a program that accesses data from a relational database.
Design relational database tables.
Use Structured Query Language (SQL)
Access a database from Visual Basic .NET
Access a database using Java Database Connectivity (JDBC)
Write a program that accesses data from an XML file.
Create an XML document.
Identify the .NET XML classes
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