SQL Query Help - - Table Normalization

Jul 20, 2005

hello

I've a denormalized table PRODUCTS with following fields:


ProductNo ,
OrderNo ,
SerialNo ,
OrderDate ,
PromiseDate ,
ManufacturerID ,
..
..
..
DistributorID ,
DealerID ,
..
..
..
ReceiptDate ,
..
..
..


I have to denormalize this table, so I created 3 tables:

Table Name : ProductOrders
Fields:
+ProducrOrderID,
ProductNo ,
OrderNo ,
SerialNo ,
OrderDate ,
PromiseDate ,
ManufacturerID ,
-------------------------------
Table Name: ProductsOrdersDetails
Fields:

+ProductsOrdersDetailsID,
ProductOrdersID,
DistributorID ,
DealerID
..
..
..
-----------------------
Table Name: ProductsOrdersReceipts
Fields:
+ProductsOrdersReceiptsID,
ProductsOrdersDetailsID,
ReceiptDate ,
..
..
..

----------------------------

DistributorID and DealerID appear in Details table because a
particular order number for a specific product number can come from
different distributor and dealer.


What I need is a query to populate these normalized tables from the
original denormalized Products table.

Can any one please help?

Thanks

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Database Table Normalization

Dec 8, 2005

Hi all,
This is actually a pretty stupid question, but somehow I need an answer from you experts.
We are currently building a web application using ASP.NET, and it simply manages contact information, like outlook. Contact information include first name, last name, birthday, etc. It also tracks address, phone number, and email. Here come the problem.
We allow only one address, 4 phone numbers and an email for each contact. When we building the database table, should we create 6 fields to contain all the information or should we create address, phone, and email table and then create the relationship between them.
Will the first method speed up the performance? Or the second method is the proper way?
I need some pros and cons on each
Thanks so much for your opinion
Sam

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Normalization,Mappings, Relationships Of Table

May 30, 2008

:eek: =>First ,2nd ,3rd normalization


=>Data Integrity

=>Mappings-
1 1:1 mappings
2 1:2 mappings
3 Many :MAny mappings


=>Establish relationship
1.Simple

2.Complex

3. Multiple



Defination of these all or details with subjects also

pls reply me soon
it is urgent for me

thanks in advance

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Jan 11, 2008

I have a form that I am building and I've run into this problem. There is a section on the form that checks if a person wants to sign up for a AM shift or PM shift for a Show. What I need to know is how do I normalize the form to reflect that in the database? Here is what the user would see on the web form.

Show AM Shift PM Shift
--------------------------------------------------
Show #1 checkbox checkbox
Show #2 checkbox checkbox
Show #3 checkbox checkbox


Here is what I have so far in the table design:

Table Shows
--------------------
ShowID int PK
Name nvarchar(50) Not Null


Table Person
--------------------
PersonID int PK
FirstName nvarchar(50) Not Null
LastName nvarchar(50) Not Null


Table Shift
----------------
ShiftID int PK
Name bit Not Null

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Jul 8, 2014

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Example:

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---------------------
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| 2 |text2|repeating|
----------------------

How to normalization would be use 3 tables ,one for tags_id and tags, and another relating the tags_id to ID from the table above...but how does the code already know there is a tag called repeating?

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Aug 17, 2004

Hi all,

I am still confuse in normalization. (1st, 2nd, 3rd, and more.)

Any body have a detail idea abt that ???
Pls explain with example.

Thxs.

Regards,
Shailesh Patel

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Nov 6, 2000

Is it possible to normalize a database using SQL statement? I have a huge duplicated records on a certain fields and need to do some normalization on it. For example, the raw data below

Field_A Field_B Field_C Field_D Field_E
1 0001 00/05/11 14.00 Start
1 0001 00/05/11 15.00
1 0001 00/05/11 16.00 End
1 0002 00/05/11 16.10 Start
1 0002 00/05/11 17.50
1 0002 00/05/11 17.10 End

should be normalized to

Field_A Field_B Field_C Duration(End-Start)
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1 0002 00/05/11 17.10-16.10=2.00


How can I do it using a SQL Query?



Andy

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Jan 15, 2008

Hi all,
Does anyone know of a good resource or tutorial that teaches you the basics of the 3 normal forms?

Muchos Gracias

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Mar 6, 2008

I'm working on a normalization for one of my classes and I've been sick and I feel lost now, could one of you please look at my database statements and tell me if/what is wrong with it?

FIRE_REPORT(FireID,Alarms,Address,FiremanID,FiremanName,FiremanPhone,FiremanHomeStation,StationAddress,StationPhone,TruckID,License,TruckHomeStation)

I came up with..

TruckID->License,TruckHome
FireID->Alarms,Address
FiremanID->FiremanName,FiremanPhone,FiremanHomeStaion,StationAddress,StationPhone

Which lead to...

FIRE(FireID,Alarms,Address)
FIREMAN(FiremanID,FiremanName,FiremanPhone,FiremanHomeStation,StationAddress,StationPhone)
TRUCK(TruckID,License,TruckHome)

Referencial Integriety Statements

FireID in FIRE_Report must exist in FireID in FIRE

FiremanID in FIRE_Report must exist in Fireman

TruckID in FIRE_REPORT must exist in TruckID in TRUCK


Please, someone tell me if this is right or not. -cheers

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Apr 14, 2005

Hi everyone..
Well i have my tables ready to build the database on to the sql server... My probs is normalization of the tables being used in the database....
Is there any best possible way / [short-cut.. very weird to ask this :) ] using the sql server...?
 
 

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Jun 13, 2005

I have a web app which is used to do normal insert/update of employee info. Connected to each employee that is entered is some data that is imported from an outside source for each employee. The question I have is currently my database is very normalized and importing data from this outside source will be quite a pain because of this. Is it bad practice to denormalize a specific table if no user will every insert/update it beside DTS?

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Sep 22, 2001

What's my question is ? Whether there are any tools available for normalization produced by Database vendors or any third party. If yes, Can u kindly give me clear documentation.

Thanks,
venkat.
venkat_26178@yahoo.com

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Sep 22, 2001

whether there are any tools for Normalization? If yes, Can u please send some documentation or some reference where I can get them.

-venkat
venkat_26178@yahoo.com

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Feb 25, 2004

Does this show "poor" design? It has been suggested to me to do a "Logical Model" of my data base and that will make it easier to "normalize" the tables. I tried this and come up with the following but I don't know if I am stretching it too thin. One rule of the 2NF is to ensure all tables have a primary key, and as you can see, my tbProjectTeam has a primary key, but that is made up of the entire row. Same goes for the tbDepartmentActivities.



tbEstimatedProjects
Reference (PK) | Name | City | Postal |...
-----------------------------------------------------------
1 | Some Project | Niagra Falls | N8E7J5 | ....

tbAwardedProjects
Project (PK) | Reference
-------------------------
1001 | 1

tbProjectTeam
Project (PK)| Login (PK) | Activity (PK)
-----------------------------------------
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tbEmployees
Login (PK) | First | Last |......
----------------------------------
jsmith | Jim | Smith |.....

tbDepartmentListing
Login | DeptCode
---------------------
jsmith | ENG

tbDepartments
Code | Department
------------------------
ENG | Engineering

tblDepartmentActivities
Code (PK) | Activity (PK)
----------------------
ENG | Engineering
ENG | Detailer




Am I taking this too far or is the above structure something to be expected by a "good" normalized table structure?

Mike B

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Jan 31, 2006

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Jul 20, 2005

I've come up with this issue in several apps now. There are things that, fromone perspective, are all handled the same, so it would be desirable that theyall be handled in the same table with some field as a type specification.From other perspective of foreign key relationships, however, they aredifferent things and can't be stored in the same table.For example, I have a scheme for indicating mappings between dimension recordsat one time period to new dimension records at another time period. I coulduse one set of tables for all mappings since they all work exactly the sameway, but then I can't set up DRI between the mapping tables and the dimensiontables. If I just make separate mapping tables for each dimension table, thenI'm creating 4 new tables per dimension table, all identical with respect towhat fields they contain, what kinds of unique constraints they have, and whatrelationships they have to each other with the sole distinction that they eachmap to the integer-type key of a different dimension table. I would not lookforward to doing maintenance on this schema!Is there any strategy for having the cake and eating it, too?

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Feb 13, 2008

I have 3 code tables :

create table cd_fiq_a
( fiq_id int not null primary key, fiq_name varchar(50) not null)

create table cd_sal_b
( sal_id int not null primary key, sal_name varchar(50) not null)


create table cd_rak_c
( rak_id int not null primary key, rak_name varchar(50) not null)



insert into cd_fiq_a values (1, 'Fiq1')

insert into cd_fiq_a values (2, 'Fiq2')



insert into cd_sal_b values (1, 'Sal1')

insert into cd_sal_b values (2, 'Sal2')

insert into cd_sal_b values (3, 'Sal3')

insert into cd_sal_b values (4, 'Sal4')

insert into cd_sal_b values (5, 'Sal5')



insert into cd_rak_c values (1, 'Rak1')

insert into cd_rak_c values (2, 'Rak2')

insert into cd_rak_c values (3, 'Rak3')

insert into cd_rak_c values (4, 'Rak4')


Now there is a relationship between cd_fiq_a, cd_sal_b and cd_rak_c. For a given Faq there can be one or more records of Sal. For a given Fiq and a given Sal there can be one or more records of Rak.
I am thinking that i can do it one table or two tables:

One Table Solution
----------------------------

create table relation_d
( relation_id int not null primary key,
fiq_id int not null foreign key REFERENCES cd_fiq_a (fiq_id),
sal_id int not null foreign key REFERENCES cd_sal_b (sal_id),
rak_id int not null foreign key REFERENCES cd_rak_c (rak_id),
sort_order int not null )

Two Table Solution
---------------------------

create table relation_header_d
( relation_header_id int not null primary key,
fiq_id int not null foreign key REFERENCES cd_fiq_a (fiq_id),
sal_id int not null foreign key REFERENCES cd_sal_b (sal_id) )


create table relation_detail_e
( relation_detail_id int not null primary key,
relation_header_id int not null foreign key REFERENCES relation_header_d (relation_header_id),
rak_id int not null foreign key REFERENCES cd_rak_c (rak_id),
sort_order int not null )


Which solution is more normalized and will result in better execution of Sql? Or is there any other solution which is more better?

Thanks

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Jun 8, 2007

Hello all,

My question concerns the amount of normalization i require for my specific needs. I realize this is a difficult question without knowing alot more about my database. I am hoping with some information I could get advice from those more experienced than I.



- My database consists of 9 tables with the maximim number of columns being 11 which is the contacts table.

- the largest data type is nvarchar 125.

- number of rows in the largest table will eventually grow to hundreds of thousands.

- users access the database online







This is large to me but I expect that to some of you this not.

My application would be easier to setup if the contacts table were to include address info.



So my question is, for a database of this size could I create a contacts table similar to the customer table in the Microsoft Northwind sample data base with the address included, or should I model something more like the contact table in the Microsoft Adventureworks db with the address and State/province split to separate tables.



Any help you could provide with this scetchy info would be greatly appreciated.



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Oct 18, 2006

Hai everybody recently i came across this article and i have tried to answer all the follwoing questions. But i am not sure its correct or not..so you peoples can comment on the follwoing questions.



2)
Employee (ssn, Name, Salary, Address, ListOfSkills)



Yes,
No. Ans: No. as list of skills would be repeated.




3)
Department (Did, Dname, ssn)

Yes,
No. Ans: No. ssn and did should be moved to a seperate table.




4)
Vehicle (LicensePlate, Brand,
Model, PurchasePrice, Year, OwnerSSN, OwnerName



Yes,
No Ans: No.




5)
Employee (ssn, Name, Salary, did) (obs.:
employee can only belong to one department)



Yes,
No. Ans: Yes.


6)
Customer (Cust_Id, Name, Salesperson, Region) where Salesperson
determines Region.



Yes,
No. Ans: No.Salesperson and region should be moved to a seperate table.



7)
Component (ItemNo, ComponentNo, ItemName, Quantity) where ItemNo
-> ItemName




Yes,
No. Ans: No.As itemname is a subset of itemno and not a subset of both itemno and componentno.


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Hi All
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Hi,

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Item-

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Ingredients-

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Catagory-

Name

Options-

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This is how I have it set up so far.

-------------------------------------

Table Item

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-Name

-Price

-------------------------------------

Table Ingredients

-IngID as Primary Key

-Name

-ItemID as relationship to Table Item

-------------------------------------

Table Catagory

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-Name

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-------------------------------------

Table Options

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-ItemID as relationship to Table Item

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I would like to know if i'm normalizing correctly. Much Thanks.

Dan

 

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