Database/Table Design-URGENT HELP!!!

Jan 15, 2008

Hi all,

I have to come up with a design choice for a DB Table for a financial firm(i.e. Tables with Fixed column or Value-Pair).

Case: SQL Server 2005 is used as a back-end for a web application(which basically is designed for doing web based analysis). The business people are insisting on a feature that enable power users to add fields to the underlying tables. One option proposed is named value-pair design approach? But from performance point of view, this seems a nightmare. How can this be integrated into static-column table approach. FYI, security policy of the client do not allow the underlying table structures to be changed by the user and currently
there are 5000 fields, with a possibility to grow.

Thanks so much for your suggestions!!
Dilla

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Database Table Design

Feb 13, 2008

I have a question regarding table design (I'm using SQL Server Express 2005). Is it better and is there a performance gain by using layout # 2 instead of layout # 1? Someone told me it was better to divide everything up but it seems kind of useless here, plus it complicates the handling. So I want to know which one is faster (or better) considering large amount of records. Thanks! Layout # 1Objet==========ObjetIDClientIDObjetTypeStateObjetNoTitleDescriptionStartDateReturnDateEndDateLayout # 2
Objet==========ObjetIDClientIDObjetTypeStateDetailsObjet==========DetailIDObjetIDObjetNoTitleDescriptionStartDateReturnDateEndDate

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Feb 27, 2005

Im trying to design a database to use in SQL server , the design i've got now is working but It just doesn't look right to me and there must be a better way to set things out.

Heres the current situation

Theres 3 tables

USERTYPES

USERS

TICKETS

The users table holds the user information i.e.

userID
userName
Phone Number
userTypeID *

It contains a foreign key called userTypeID which is a primary key of USERTYPES

The USERTYPES table contains the two types of users on the system , these are standard and admin, so the table looks like this.


USERTYPESID
typeName

The TICKETS table holds the ticket details of tickets submitted by users. so

ticketID
ticketName
ticketDescription
DueDate
ticketRequestor *
AssignedTo *

Now here is where I have the problem, the ticketRequestor is a foreign key of the STAFF table staffID however AssignedTo is also a foreign key of the STAFF table staffID.

Currently in order to get this working i've had to turn off the enforce relationship for the AssignedTO - staffID link but idealy I think this enforce relationship should be on to ensure its a truely relational.

any ideas as to what I need to do to organise the relationships better ?

thanks

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I have questions table and answers in survey database. Now I design responses table from users !

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[Code] ...

My Questions : How can I store data if questions is multiply answers (checkbox type) ?What is best way ?

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Apr 14, 2006

In the past, we had table names such as:
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SalesOrders

Now with SQL 2005, you can use schema namespaces, so it could become:
Purchasing.Orders
Sales.Orders

So essentially you can use exactly the SAME table names, in different schemas.

So... would you recommend to change to the last model, or just stay with the old way?
What is best practice?



One of the reasons why I ask this question is that I looked at the AdventureWorks sample database included with SQL Server 2005, and Microsoft is using:

Sales.SalesOrderDetail
Purchasing.PurchaseOrderDetail
etc...

Why not:
Sales.OrderDetail
Purchasing.OrderDetail
etc...

????????

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Database Table Design For Huge Number Of Columns

Jan 24, 2008

Hi

I have a table (Sql server 2000) which has 14 cost columns for each record, and now due to a new requirement, I have 2 taxes which needs to be applied on two more fields called Share1 and share 2
e.g
Sales tax = 10%
Use Tax = 10%
Share1 = 60%
Share2 = 40%

So Sales tax Amt (A) = Cost1 * Share1 * Sales Tax
So Use tax Amt (B) = cost1 * share2 * Use tax

same calculation for all the costs and then total cost with Sales tax = Cost 1 + A , Cost 2 + A and so on..
and total cost with Use tax = Cost1 +B, Cost 2 +B etc.

So there are around 14 new fields required to save Sales Tax amt for each cost, another 14 new fields to store Cost with Sales Tax, Cost with Use tax. So that increases the table size.
Some of these fields might be used for making reports.

I was wondering which is a better approach out of the below 3:
1) To calculate these fields dynamically while displaying them on the User interface and not save in DB (while making reports, again calculate these fields dynamically and show), or
2) Add new formula field columns in database table to save each field, which would make the table size bigger, but reporting becomes easier.
3) Add only those columns in database on which reports needs to be made, calculate rest of the fields dynamically on screen.

Your help is greatly appreciated.
Thanks

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Database Table Design For Huge Number Of Columns

Jan 24, 2008

Hi

I have a table (Sql server 2000) which has 14 cost columns for each record, and now due to a new requirement, I have 2 taxes which needs to be applied on two more fields called Share1 and share 2
e.g
Sales tax = 10%
Use Tax = 10%
Share1 = 60%
Share2 = 40%

So Sales tax Amt (A) = Cost1 * Share1 * Sales Tax
So Use tax Amt (B) = cost1 * share2 * Use tax

same calculation for all the costs and then total cost with Sales tax = Cost 1 + A , Cost 2 + A and so on..
and total cost with Use tax = Cost1 +B, Cost 2 +B etc.

So there are around 14 new fields required to save Sales Tax amt for each cost, another 14 new fields to store Cost with Sales Tax, Cost with Use tax. So that increases the table size.
Some of these fields might be used for making reports.

I was wondering which is a better approach out of the below 4:
1) To calculate these fields dynamically while displaying them on the User interface and not save in DB (while making reports, again calculate these fields dynamically and show), or
2) Add new formula field columns in database table to save each field, which would make the table size bigger, but reporting becomes easier.
3) Add only those columns in database on which reports needs to be made, calculate rest of the fields dynamically on screen.

4) Create a view just for reports, and calculate values dynamically in UI and not adding any computed values in table.



Your help is greatly appreciated.
Thanks

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Hello,friends

1) CustomerID
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8) Occupation
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10) Line of Business
11) DOB
12) Father Name
13) Mother Name
14) SpouseName
15) Gender
16) Email
17) MainTel
18) Home Tel
19) Passport Number
20)----------------------
21)- - - - - - - - - - -


100)-------------------
Above mentioned list is a snapshot of our customer master table ,which contain approximately 100 attributes related to a customer.

We are designing an application for banking sector (but NOT Core banking solution),for which we may need to capture variable number of addresses for bank's customer,i.e more then three types of addresses Fixed,Temporary and Communication addresses(which is generally the case with all banks).
A single address includes address1/address2/city/country/state/pincode fields.
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As another option we can can create redundent addresses columns(address1/address2/city/country/state/pincode) in master table that will accumulate addresses if demand for more then three type addresses arises(although there is reasonable numer of extra addresses is expected, i.e 10)

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What makes this interesting (at least for me) is that a subject has an owner and at least 1 "expert", possibly up to 3. Here is what I am thinking for tables:

tblEmployee

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etc......
tblSubject

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tblOwner

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EmployeeID (FK)
tblExpert1

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tblExpert2

SubjectID (FK)
EmployeeID (FK)
tblExpert3

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Thanks in advance for any help!!!!!

Cal

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Hi,
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Dim sqlCommand2 As New SqlCommand("", SqlConnection1)
Dim sqlconnection2 As New SqlConnection(ConfigurationSettings.AppSettings("smDSN"))
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............................
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-------
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-------
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----
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----
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-----------
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[jjj] [varchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[kkk] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[lll] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[mmm] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[nnnn] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[ooo] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[ppp] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[qqqq] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[rrrr] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[ssss] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[tttt] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[uuuuu] [varchar] (2000) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[vvvvv] [varchar] (500) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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) ON [PRIMARY]


I have created a table with above column width. The rowsize is more than 8kb.And the table holds millions of rows of data. So is it a correct way of designing the table?
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Thanks.

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Now, since the unit price of a product is not determined from the same tables as the unit price of equipment rentals or sub contract work, etc...
how do I direct the attention to the appropriate table when trying to obtain the unit price or edit the unit price etc...

If my question is not clear, let me know, I will try to clarify.

Mike B

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