Difference between revisions of "DD Class9"

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*http://staruml.sourceforge.net/en/ free and open source
 
*http://staruml.sourceforge.net/en/ free and open source
 
*http://www.visual-paradigm.com/product/vpuml/ proprietary free community edition
 
*http://www.visual-paradigm.com/product/vpuml/ proprietary free community edition
 +
 +
==Views==
 +
 +
UserTest
 +
{| class="wikitable" cellpadding="5" cellspacing="0"
 +
! UserID !! UserName !! LastLogon
 +
|-
 +
| 1 || jmeyers || 3/30/03
 +
|-
 +
|2 || bgates || 4/1/03
 +
|-
 +
|3 || sjobs || 4/2/03
 +
|-
 +
|4 || ltorvalds || 4/3/03
 +
|}
 +
 +
 +
EmailTest
 +
{| class="wikitable" cellpadding="5" cellspacing="0"
 +
! EmailID !! UserID !! EmailAddress !! Active !! displayEmail
 +
|-
 +
| 1 || 1 || jeff@interactive.colum.edu || 1 || 0
 +
|-
 +
| 2 || 1 || only_a_test@hotmail.com || 0 || 0
 +
|-
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| 3 || 2 || bgates@microsoft.com || 1 || 0
 +
|}
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 +
[INNER] JOIN
 +
 +
The INNER JOIN returns all rows from both tables where there is a match. If there are rows in User that do not have matches in Email, those rows will not be listed.
 +
 +
-- ANSI Style
 +
<sql>
 +
SELECT u.UserID,
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u.UserName,
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u.LastLogon,
 +
e.EmailAddress,
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e.active,
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e.displayEmail
 +
FROM UserTest u
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JOIN EmailTest e ON e.UserID = u.UserID
 +
</sql>
 +
 +
--Theta style
 +
<sql>
 +
SELECT u.UserID,
 +
u.UserName,
 +
u.LastLogon,
 +
e.EmailAddress,
 +
e.active,
 +
e.displayEmail
 +
FROM UserTest u,
 +
EmailTest e
 +
WHERE e.UserID = u.UserID
 +
</sql>
 +
 +
results
 +
 +
<pre>
 +
UserID      UserName            LastLogon                    EmailAddress                    active displayEmail
 +
----------- ------------------- ----------------------------- -------------------------------- ------ ------------
 +
1          jmeyers            2003-03-30 00:00:00.000      jeff@interactive.colum.edu      1      0
 +
1          jmeyers            2003-03-30 00:00:00.000      only_a_test@hotmail.com          0      0
 +
2          bgates              2003-04-01 00:00:00.000      bgates@microsoft.com            1      0
 +
 +
(3 row(s) affected)
 +
</pre>
 +
 +
LEFT [OUTER] JOIN
 +
 +
The LEFT JOIN returns all the rows from the first table (User), even if there are no matches in the second table (Email). If there are rows in User that do not have matches in Email, those rows also will be listed.
 +
 +
<sql>
 +
SELECT u.UserID,
 +
u.UserName,
 +
u.LastLogon,
 +
e.EmailAddress,
 +
e.active,
 +
e.displayEmail
 +
FROM UserTest u
 +
LEFT JOIN EmailTest e ON e.UserID = u.UserID
 +
</sql>
 +
 +
<pre>
 +
UserID      UserName    LastLogon                EmailAddress                active displayEmail
 +
----------- ------------ ------------------------- ---------------------------- ------ ------------
 +
1          jmeyers      2003-03-30 00:00:00.000  jeff@interactive.colum.edu  1      0
 +
1          jmeyers      2003-03-30 00:00:00.000  only_a_test@hotmail.com      0      0
 +
2          bgates      2003-04-01 00:00:00.000  bgates@microsoft.com        1      0
 +
3          sjobs        2003-04-02 00:00:00.000  NULL                        NULL  NULL
 +
4          ltorvalds    2003-04-03 00:00:00.000  NULL                        NULL  NULL
 +
 +
(5 row(s) affected)
 +
</pre>
 +
 +
RIGHT [OUTER] JOIN
 +
 +
The RIGHT JOIN returns all the rows from the second table (Email), even if there are no matches in the first table (User). If there had been any rows in Email that did not have matches in User, those rows also would have been listed.
 +
 +
<sql>
 +
SELECT u.UserID,
 +
u.UserName,
 +
u.LastLogon,
 +
e.EmailAddress,
 +
e.active,
 +
e.displayEmail
 +
FROM UserTest u
 +
RIGHT JOIN EmailTest e ON e.UserID = u.UserID
 +
</sql>
 +
 +
results
 +
 +
<pre>
 +
UserID      UserName            LastLogon                    EmailAddress                    active displayEmail
 +
----------- ------------------- ----------------------------- -------------------------------- ------ ------------
 +
1          jmeyers            2003-03-30 00:00:00.000      jeff@interactive.colum.edu      1      0
 +
1          jmeyers            2003-03-30 00:00:00.000      only_a_test@hotmail.com          0      0
 +
2          bgates              2003-04-01 00:00:00.000      bgates@microsoft.com            1      0
 +
 +
(3 row(s) affected)
 +
</pre>
 +
Making views in enterprise manager is easy. Just add the tables you want to join and click. It does all the typing for you.
 +
  
 
==Review First Normal Form==
 
==Review First Normal Form==

Revision as of 16:20, 24 October 2011


Primary Keys

The candidate key selected as being most important for identifying a body of information (an entity, object or record).

Normalization

Normal Forms

First Normal

Form eliminates repeating groups by putting each into a separate table and connecting them with a one-to-many relationship.

Data Relationships

Not Following First Normal Form Repeating Groups

Blog1

BlogID BlogText recCreationDate Mood
1 Blog1 03/30/03 Happy
2 Blog2 03/30/03 Happy
3 Blog3 03/30/03 Sad
4 Blog4 03/30/03 Happy
5 Blog4 03/30/03 Mad

Tables that Follow First normal form

Blog2

BlogID BlogText recCreationDate MoodID
1 Blog1 03/30/03 1
2 Blog2 03/30/03 1
3 Blog3 03/30/03 2
4 Blog4 03/30/03 1
5 Blog4 03/30/03 3

Mood

MoodID MoodName
1 Happy
2 Sad
3 Mad
4 Afraid

1NF also

Removes multiple column with the same type of data

Books Not Normal

Books

Author Title_01 Pages_01 Title_02 Pages_02 Title_03 Pages_03
Michael Allen Dymmoch The Man Who Understood Cats 256 White Tiger 320
Joseph Cancellaro Exploring Sound Design for Interactive Media 272 
In Class Build Blogs Table and Normalize Books Table


http://en.wikipedia.org/wiki/First_normal_form

ERD

http://en.wikipedia.org/wiki/Entity-relationship_model

tools

Views

UserTest

UserID UserName LastLogon
1 jmeyers 3/30/03
2 bgates 4/1/03
3 sjobs 4/2/03
4 ltorvalds 4/3/03


EmailTest

EmailID UserID EmailAddress Active displayEmail
1 1 jeff@interactive.colum.edu 1 0
2 1 only_a_test@hotmail.com 0 0
3 2 bgates@microsoft.com 1 0

[INNER] JOIN

The INNER JOIN returns all rows from both tables where there is a match. If there are rows in User that do not have matches in Email, those rows will not be listed.

-- ANSI Style <sql> SELECT u.UserID, u.UserName, u.LastLogon, e.EmailAddress, e.active, e.displayEmail FROM UserTest u JOIN EmailTest e ON e.UserID = u.UserID </sql>

--Theta style <sql> SELECT u.UserID, u.UserName, u.LastLogon, e.EmailAddress, e.active, e.displayEmail FROM UserTest u, EmailTest e WHERE e.UserID = u.UserID </sql>

results 

UserID      UserName            LastLogon                     EmailAddress                     active displayEmail 
----------- ------------------- ----------------------------- -------------------------------- ------ ------------ 
1           jmeyers             2003-03-30 00:00:00.000       jeff@interactive.colum.edu       1      0
1           jmeyers             2003-03-30 00:00:00.000       only_a_test@hotmail.com          0      0
2           bgates              2003-04-01 00:00:00.000       bgates@microsoft.com             1      0

(3 row(s) affected)

LEFT [OUTER] JOIN

The LEFT JOIN returns all the rows from the first table (User), even if there are no matches in the second table (Email). If there are rows in User that do not have matches in Email, those rows also will be listed.

<sql> SELECT u.UserID, u.UserName, u.LastLogon, e.EmailAddress, e.active, e.displayEmail FROM UserTest u LEFT JOIN EmailTest e ON e.UserID = u.UserID </sql> 

UserID      UserName     LastLogon                 EmailAddress                 active displayEmail 
----------- ------------ ------------------------- ---------------------------- ------ ------------ 
1           jmeyers      2003-03-30 00:00:00.000   jeff@interactive.colum.edu   1      0
1           jmeyers      2003-03-30 00:00:00.000   only_a_test@hotmail.com      0      0
2           bgates       2003-04-01 00:00:00.000   bgates@microsoft.com         1      0
3           sjobs        2003-04-02 00:00:00.000   NULL                         NULL   NULL
4           ltorvalds    2003-04-03 00:00:00.000   NULL                         NULL   NULL

(5 row(s) affected)

RIGHT [OUTER] JOIN

The RIGHT JOIN returns all the rows from the second table (Email), even if there are no matches in the first table (User). If there had been any rows in Email that did not have matches in User, those rows also would have been listed.

<sql> SELECT u.UserID, u.UserName, u.LastLogon, e.EmailAddress, e.active, e.displayEmail FROM UserTest u RIGHT JOIN EmailTest e ON e.UserID = u.UserID </sql>

results 

UserID      UserName            LastLogon                     EmailAddress                     active displayEmail 
----------- ------------------- ----------------------------- -------------------------------- ------ ------------ 
1           jmeyers             2003-03-30 00:00:00.000       jeff@interactive.colum.edu       1      0
1           jmeyers             2003-03-30 00:00:00.000       only_a_test@hotmail.com          0      0
2           bgates              2003-04-01 00:00:00.000       bgates@microsoft.com             1      0

(3 row(s) affected)

Making views in enterprise manager is easy. Just add the tables you want to join and click. It does all the typing for you.


Review First Normal Form

Let build the example for the homework.

Build Interface to GameDB

Games

GameTitle GameGenre DeveloperName Platform(s) Year DeveloperWebsite GameWebsite
Quake1 FPS id Dos 1996 http://www.idsoftware.com/ http://www.idsoftware.com/games/quake/quake/
Diablo RPG Blizzard Windows 95 1996 http://www.blizzard.com/ http://www.blizzard.com/diablo/
SimCity Sim Interplay Dos 1993 http://www.interplay.com/ http://www.maxis.com/

Tables Games, Developers, Websites, Platforms?

Build Views

Nesting Data Bound Controls

nesting controls

Datasource Controls can probably handle up to 70% of your data binding needs but they do have drawbacks. Consider the cheese database which uses an SQL view to join Cheese with Region, Consistency, and MilkType. Of course SQL view don't support updating and can lead to some bad data binding. we can fix a few of these problem with stored procedures.

Simple filter Demo in class

GridView Details View Master Child Relationship


http://iam.colum.edu/dd/classsource/data/CheeseDataBindingFull.aspx source

Stored Procedures

http://iam.colum.edu/dd/classsource/data/sproc/sprocADO.aspx

Cheese browser assignment

Make a creative cheese browser from that tables in you db. Use a view to join that data from multiple tables..

Here's and example of a simple cheese shop browser app.

http://iam.colum.edu/dd/classsource/class8/CheeseShop/CheeseShop1.aspx

Homework

Make a creative cheese browser from that tables in you db. Use a view to join that data from multiple tables..


Examples

http://iam.colum.edu/dd/classsource/Data/GridAndDetails.aspx

http://iam.colum.edu/dd/classsource/Data/GridDataBound.aspx

http://iam.colum.edu/dd/classsource/Data/GridDetails.aspx

http://iam.colum.edu/dd/classsource/Data/GridEdit.aspx

http://iam.colum.edu/dd/classsource/Data/GridSelect.aspx

http://iam.colum.edu/dd/classsource/Data/GridSelectTheme.aspx

http://iam.colum.edu/dd/classsource/Data/GridTemplate.aspx

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