DD Class11
Contents
- 1 More Normal Forms
- 2 Many to Many Relationships
- 3 HomeWork
- 4 Logon Using the tables we made last week
- 5 Logon the Microsoft way
- 6 Sql Aggregate Functions
- 7 Sub Query
- 8 Email
- 9 HomeWork
- 10 Logon Using the tables we made last week
- 11 Logon the Microsoft way
- 12 Sql Aggregate Functions
- 13 Sub Query
- 14 HomeWork
More Normal Forms
Second Normal Form
In order to reach 2NF the table must first be in 1NF
Second Normal Form eliminates functional dependencies on a partial key by putting the fields in a separate table from those that are dependent on the whole key.
'Remove Fields that are not dependent on the primary key'
Not Normal
Adresses
| CustNum | FirstName | LastName | Address | City | State | ZIP |
|---|---|---|---|---|---|---|
| 1 | John | Doe | 12 Main Street | Sea Cliff | NY | 11579 |
| 2 | Alan | Johnson | 82 Evergreen Tr | Sea Cliff | NY | 11579 |
| 3 | Beth | Thompson | 1912 NE 1st St | Miami | FL | 33157 |
| 4 | Jacob | Smith | 142 Irish Way | South Bend | IN | 46637 |
| 5 | Sue | Ryan | 412 NE 1st St | Miami | FL | 33157 |
Normal
StatesZips
| ZIP | City | State |
|---|---|---|
| 11579 | Sea Cliff | NY |
| 33157 | Miami | FL |
| 46637 | South Bend | IN |
Address
| CustNum | FirstName | LastName | Address | ZIP |
|---|---|---|---|---|
| 1 | John | Doe | 12 Main Street | 11579 |
| 2 | Alan | Johnson | 82 Evergreen Tr | 11579 |
| 3 | Beth | Thompson | 1912 NE 1st St | 33157 |
| 4 | Jacob | Smith | 142 Irish Way | 46637 |
| 5 | Sue | Ryan | 412 NE 1st St | 33157 |
In class
Normalize the books exmaple
Books
| Author | Title | Pages | Publisher | PublisherURL | Subject | ISBN |
|---|---|---|---|---|---|---|
| Michael Allen Dymmoch | The Man Who Understood Cats | 256 | Avon Books | http://www.harpercollins.com/imprints/index.aspx?imprintid=517994 | Fiction Mystery | 0380722658 |
| Joseph Cancellaro | Exploring Sound Design for Interactive Media | 272 | Thomson Delmar Learning | http://www.delmarlearning.com/ | Sound | 1401881025 |
Third Normal Form
Third Normal Form eliminates functional dependencies on non-key fields by putting them in a separate table. At this stage, all non-key fields are dependent on the key, the whole key and nothing but the key. Must be in second normal form.
Not normal
| Company | City | State | ZIP |
|---|---|---|---|
| Acme Widgets | New York | NY | 10169 |
| ABC Corporation | Miami | FL | 33196 |
| XYZ, Inc. | Columbia | MD | 21046 |
Normal
| KompanyID | KompanyName | Zip |
|---|---|---|
| 1 | Acme Widgets | 10169 |
| 2 | ABC Corporation | 33196 |
| 3 | XYZ, Inc. | 21046 |
| Zip | CityID |
|---|---|
| 10169 | 1 |
| 33196 | 2 |
| 21046 | 3 |
| CityID | City |
|---|---|
| 1 | New York |
| 2 | Miami |
| 3 | Columbia |
| StateID | State |
|---|---|
| 1 | NY |
| 2 | FL |
| 3 | MD |
http://home.earthlink.net/~billkent/Doc/simple5.htm.
Many to Many Relationships
Look up tables. Are often used to define a many to many relation ship. These lookup tables often have a compound key.
See the Student Courses example from the Data Relationships page.
This is a demonstration of a logon system where users can have multiple roles. There is a compound key used on the roles table. The compound key consists of two or more foreign keys. Each combination of foreign keys must be unique.
Lookup Table
Here the BlogTags Tbale uses a compound key (two primary keys) to join two other tables. The Blog table is joined to the Tag table where each person can add a tag. This is a one to many one to many relationship. Person can a tag to each blog. This is often referred to as a look up table
HomeWork
Blog project can be done alone or XP style with one partner.
Logon Using the tables we made last week
You can use the Authorization Section of web.config to protect file or a directory. You can have more than one web.config in a project also. You can have one for each folder. The web.config setting inherit from the parent folder and most section can be overridden. Here is an example of a small web.config that protects a folder call admin with the .net authentication mechanism.
http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Web.config
Main web.config add the following to the system.web section <xml> <system.web>
<authentication mode="Forms">
<forms loginUrl="classsource/logon/logon.aspx" name="adAuthCookie" timeout="20" path="/" protection="All"> </forms>
</authentication>
</system.web>
</xml>
Now any link to the admin folder
http://iam.colum.edu/dd/classsource/logon/admin/
should redirect to the logon page
Logon Page
http://iam.colum.edu/dd/classsource/Logon/Logon.aspx - source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Logon.aspx.cs
Add a New user page http://iam.colum.edu/dd/classsource/Logon/CreateAccount.aspx -source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/CreateAccount.aspx.cs
Admin Page http://iam.colum.edu/dd/classsource/Logon/Admin/Default.aspx - source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Admin/Default.aspx.cs
Logon the Microsoft way
Sql Aggregate Functions
They perform a calculation on a set to values and return a single value. Aggregate functions are determinate. They will return the same value given the same dataset.
- AVG
- MIN
- CHECKSUM
- SUM
- CHECKSUM_AGG
- STDEV
- COUNT
- STDEVP
- COUNT_BIG
- VAR
- GROUPING
- VARP
- MAX
<sql> SELECT MAX(PricePerPound) as MaxPrice from CheesePrice
SELECT AVG(PricePerPound) as AvgPrice from CheesePrice
SELECT COUNT(CheeseID) as Count from CheesePrice </sql>
Sub Query
A query may be a part of another query. This allows
IN vs EXSISTS
Remember the Many to Many relation ship in the Student Registration System
Here a student has many course and a course has many student. Imagine in the registration system the student will be presented with a list of classes that they can add. That list of classes should not include the courses that they are already taking. Course
| CourseID | CourseName | CourseNumber |
|---|---|---|
| 9 | Science | 66-0002 |
| 10 | Math | 66-0001 |
| 11 | Data Design | 36-2601 |
| 168 | Application Design | 36-4601 |
| 169 | OOP | 36-2001 |
Student
| StudentID | PeopleID | OasisID |
|---|---|---|
| 1 | 1 | 666666 |
| 2 | 2 | 777777 |
StudentCourses
| StudentID | CourseID | SemesterID |
|---|---|---|
| 1 | 9 | 1 |
| 2 | 9 | 1 |
| 1 | 10 | 1 |
StudentsCourses_vw <sql> SELECT dbo.Student.PeopleID, dbo.Student.OasisID, dbo.StudentCourses.SemesterID, dbo.Course.CourseName,
dbo.Course.CourseNumber, dbo.Student.StudentID, dbo.Course.CourseID
FROM dbo.StudentCourses INNER JOIN
dbo.Student ON dbo.StudentCourses.StudentID = dbo.Student.StudentID INNER JOIN dbo.Course ON dbo.StudentCourses.CourseID = dbo.Course.CourseID
</sql>
<sql> SELECT CourseID, CourseName, CourseNumber FROM Course WHERE (
CourseID not in
(
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = @StudentID
)
) </sql>
This query has two parts
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = 1
returns
| CourseID |
|---|
| 9 |
| 10 |
then
<sql> SELECT CourseID, CourseName, CourseNumber FROM Course WHERE (
CourseID NOT IN
(
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = 1
)
) </sql>
returns
| CourseID | CousreName | CourseNumber |
|---|---|---|
| 11 | Data Design | 36-2601 |
| 168 | Application Design | 36-4601 |
| 169 | OOP | 36-2001 |
Course adder example
http://iam.colum.edu/dd/classsource/class8/student.aspx
SQL Subquery
Send Mail
<csharp><% @Page Language="C#" %> <% @Import Namespace="System.Web.Mail" %> <%
//set up some strings for the email string strTo = "only_a_test@fastmail.fm"; string strFrom = "jeff@interactive.colum.edu"; string strSubject = "Hi jeff"; string strBody = "A real nice body text here"; //Send email SmtpMail.SmtpServer = "localhost"; SmtpMail.Send(strFrom, strTo, strSubject, strBody);
%></csharp> http://iam.colum.edu/oop/classsource/class14/mail.aspx [-source]
C:\Windows\Microsoft.NET\Framework\v2.0.50727>aspnet_regsql.exe
HomeWork
Final Proposal
Final Website proposal. Due 11/29. Final Proposal
Write a short requirements document (website) that explains
- Rationale: for website design or introduction of product features
- Audience: Description of target audience and segments for new website areas
- Requirements Summary: Key Areas and Features elaborate on requirements above
- Design Documents: Site Map (hand drawn, word doc, xml visio, paper napkin) and Data Diagram (sql 2008 diagram screen shot)
Final Requirements
The final website should show off all of your new .NET skills. I'll leave the idea and the content of the website up to you. Good proposals might be... An anonymous cheese rating website (similar) to midterm but using SQL server as the persistence layer. It would allow ratings for cheese from varios regions then show the most popular cheese by region.
- Use Web Forms for user interaction
- Use State (sessions, application, viewstate)
- Use Database (I can help you design your db if you can't do this) with either SQLDataSource Direct ADO or LINQDataSource
Logon Using the tables we made last week
You can use the Authorization Section of web.config to protect file or a directory. You can have more than one web.config in a project also. You can have one for each folder. The web.config setting inherit from the parent folder and most section can be overridden. Here is an example of a small web.config that protects a folder call admin with the .net authentication mechanism.
http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Web.config
Main web.config add the following to the system.web section <xml> <system.web>
<authentication mode="Forms">
<forms loginUrl="classsource/logon/logon.aspx" name="adAuthCookie" timeout="20" path="/" protection="All"> </forms>
</authentication>
</system.web>
</xml>
Now any link to the admin folder
http://iam.colum.edu/dd/classsource/logon/admin/
should redirect to the logon page
Logon Page
http://iam.colum.edu/dd/classsource/Logon/Logon.aspx - source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Logon.aspx.cs
Add a New user page http://iam.colum.edu/dd/classsource/Logon/CreateAccount.aspx -source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/CreateAccount.aspx.cs
Admin Page http://iam.colum.edu/dd/classsource/Logon/Admin/Default.aspx - source http://iam.colum.edu/dd/gbrowser.php?file=/classsource/Logon/Admin/Default.aspx.cs
Logon the Microsoft way
Sql Aggregate Functions
They perform a calculation on a set to values and return a single value. Aggregate functions are determinate. They will return the same value given the same dataset.
- AVG
- MIN
- CHECKSUM
- SUM
- CHECKSUM_AGG
- STDEV
- COUNT
- STDEVP
- COUNT_BIG
- VAR
- GROUPING
- VARP
- MAX
<sql> SELECT MAX(PricePerPound) as MaxPrice from CheesePrice
SELECT AVG(PricePerPound) as AvgPrice from CheesePrice
SELECT COUNT(CheeseID) as Count from CheesePrice </sql>
Sub Query
A query may be a part of another query. This allows
IN vs EXSISTS
Remember the Many to Many relation ship in the Student Registration System
Here a student has many course and a course has many student. Imagine in the registration system the student will be presented with a list of classes that they can add. That list of classes should not include the courses that they are already taking. Course
| CourseID | CourseName | CourseNumber |
|---|---|---|
| 9 | Science | 66-0002 |
| 10 | Math | 66-0001 |
| 11 | Data Design | 36-2601 |
| 168 | Application Design | 36-4601 |
| 169 | OOP | 36-2001 |
Student
| StudentID | PeopleID | OasisID |
|---|---|---|
| 1 | 1 | 666666 |
| 2 | 2 | 777777 |
StudentCourses
| StudentID | CourseID | SemesterID |
|---|---|---|
| 1 | 9 | 1 |
| 2 | 9 | 1 |
| 1 | 10 | 1 |
StudentsCourses_vw <sql> SELECT dbo.Student.PeopleID, dbo.Student.OasisID, dbo.StudentCourses.SemesterID, dbo.Course.CourseName,
dbo.Course.CourseNumber, dbo.Student.StudentID, dbo.Course.CourseID
FROM dbo.StudentCourses INNER JOIN
dbo.Student ON dbo.StudentCourses.StudentID = dbo.Student.StudentID INNER JOIN dbo.Course ON dbo.StudentCourses.CourseID = dbo.Course.CourseID
</sql>
<sql> SELECT CourseID, CourseName, CourseNumber FROM Course WHERE (
CourseID not in
(
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = @StudentID
)
) </sql>
This query has two parts
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = 1
returns
| CourseID |
|---|
| 9 |
| 10 |
then
<sql> SELECT CourseID, CourseName, CourseNumber FROM Course WHERE (
CourseID NOT IN
(
SELECT CourseID FROM StudentsCourses_vw WHERE StudentID = 1
)
) </sql>
returns
| CourseID | CousreName | CourseNumber |
|---|---|---|
| 11 | Data Design | 36-2601 |
| 168 | Application Design | 36-4601 |
| 169 | OOP | 36-2001 |
Course adder example
http://iam.colum.edu/dd/classsource/class8/student.aspx
SQL Subquery
HomeWork
Final Proposal
Final Website proposal. Due 11/29. Final Proposal
Write a short requirements document (website) that explains
- Rationale: for website design or introduction of product features
- Audience: Description of target audience and segments for new website areas
- Requirements Summary: Key Areas and Features elaborate on requirements above
- Design Documents: Site Map (hand drawn, word doc, xml visio, paper napkin) and Data Diagram (sql 2008 diagram screen shot)
Final Requirements
The final website should show off all of your new .NET skills. I'll leave the idea and the content of the website up to you. Good proposals might be... An anonymous cheese rating website (similar) to midterm but using SQL server as the persistence layer. It would allow ratings for cheese from varios regions then show the most popular cheese by region.
- Use Web Forms for user interaction
- Use State (sessions, application, viewstate)
- Use Database (I can help you design your db if you can't do this) with either SQLDataSource Direct ADO or LINQDataSource
