Database Schema Designing

Feb 26, 2004

Case 1:
A company is involved into e-commerce..hosting multiple websites for different products.

CAse 2:
The above scenario could also be implemented with a single site having multiple products for sale.

For Case 2 one would go for a single database for all the products.
While for CAse 1 ,a separate Database is developed for each Site.


What I fill is CAse2 is a more appropriate choice even if we have multiple sites for different products.

This would help us in rapid development of any ecommerce site...
ANd better ERP management for the Company.

I would appreciate some expert guidelines for the above scenario


Thanx in Advance
Warm Regards
Girija

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The 'System.Web.Security.SqlMembershipProvider' Requires A Database Schema Compatible With Schema Version '1'.

Sep 27, 2007

Locally I develop in SQL server 2005 enterprise. Recently I recreated my db on the server of my hosting company (in sql server 2005 express).I basically recreated the tables and copied the data in it.I now receive the following error when I hit the DB:The 'System.Web.Security.SqlMembershipProvider' requires a
database schema compatible with schema version '1'.  However, the
current database schema is not compatible with this version.  You may
need to either install a compatible schema with aspnet_regsql.exe
(available in the framework installation directory), or upgrade the
provider to a newer version.I heard something about running aspnet_regsql.exe, but I dont have that access to the DB. Also I dont know if this command does anything more than creating the membership tables and filling it with some default data...Any other solutions/thought on what this can be?Thanks!

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Designing A Database Within A Database... Design Question Storing Data...

Jul 23, 2005

I have a system that basically stores a database within a database (I'msure lots have you have done this before in some form or another).At the end of the day, I'm storing the actual data generically in acolumn of type nvarchar(4000), but I want to add support for unlimitedtext. I want to do this in a smart fashion. Right now I am leaningtowards putting 2 nullable Value fields:ValueLong ntext nullableValueShort nvarchar(4000) nullableand dynamically storing the info in one or the other depending on thesize. ASP.NET does this exact very thing in it's Session State model;look at the ASPStateTempSessions table. This table has both aSessionItemShort of type varbinary (7000) and a SessionItemLong of typeImage.My question is, is it better to user varbinary (7000) and Image? I'mthinking maybe I should go down this path, simply because ASP.NET does,but I don't really know why. Does anyone know what would be the benifitof using varbinary and Image datatypes? If it's just to allow saving ofbinary data, then I don't really need that right now (and I don't thinkASP.NET does either). Are there any other reasons?thanks,dave

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Database Designing...

Apr 5, 2004

Friends,
Who is responsible for the Design of Database? System Analyst, DBA, Databse Designer, Project Leader? Coz I am working as a System Analyst, but now desgining the Databse for the ERP package which I feel is another man's work. Confussed. Plz help me.

Anil

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Database Designing Tools

Jun 9, 2004

Hi all,
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Vik!

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Things To Consider While Designing Database

Dec 5, 2005

One interviewer has asked me the following question:
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I have told about integrity constraints, and normal forms.
but he has added 15 more concepts like
1. indexers
2. Table columns
3. Table rows
4. search facilities
6.......
Can any one give full Idea on this question?
Thanking you     Ashok kumar.

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Nov 22, 2005

Hi,

My current project requires me to convert a mysql based software to a more generic one. I started by designing separate db class files and separated the lower level connection queries from the business logic. By doing this, I now have mssql.class, mysql.class, sqllite.class etc..

But am not sure how to handle sql functions in queries. For instance, one of my queries need the use of a date function to add minutes to a db field.

In mysql, I accomplish this using

dbfield+interval '$arg' minute between date1 and date1


But in mssql I cannot use this type of query. It seems I'll have to use date_add() function. How do I handle this situation?

My frontend scripting language is php

Thanks d'advance
Celia

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Database Schema Compatible With Schema Version '1'

Apr 12, 2008

Hello everybody!I'm using ASP.NET  3.5,  MSSQL 2005I  bought virtual web hosting .On new user registrations i have an error =(The 'System.Web.Security.SqlMembershipProvider' requires a database schema compatible with schema version '1'.  However, the current database schema is not compatible with this version.  You may need to either install a compatible schema with aspnet_regsql.exe (available in the framework installation directory), or upgrade the provider to a newer version. On my virtual machine it work fine but on web hosting i have an error =(What can you propose to me?

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Designing Database For Jobs Portal

May 27, 2006

Hi...

I am making a online job portal....for dat i need to make a gud database.

wud anybody be kind enuf to provide or tell me how to make a good database design...

thnx..

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Is There Any Guideline To Reach The 5NF Or Above In Database Designing?

Jul 20, 2005

Dear All,How to reach to the highest level of normalization for database designing?Guide Lines Needed.What will be the characteristics of a database of a completely normalized databae?Check List needed.ThanksSuryaPrakash Patel****************************************** This message was posted via http://www.sqlmonster.com** Report spam or abuse by clicking the following URL:* http://www.sqlmonster.com/Uwe/Abuse...118039e018ee088*****************************************

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Perfomance Enhancement Through Proper Database Designing

Jul 20, 2005

Dear ReaderI am trying to design a database. How can I make best Judgement that Indexing (which I am trying to fix during Diagram Desingning process)is ok.I am able to identify the best candidate for the indexing.Below is the details I want to understand:AreaZIPCityCountyDistrictState/ProvinceCountryNow I want the data retrival optimization through Index. (you can suggest another idea, also)Entities Area,...., Country have independent tables.Example:Area_TableAreaID (PK)AreaThey have relationship- one to many- if you go from Country to Area.There is one more table:Location_Table (PK)LocationIDAreaIDZIPIDCityIDCountyIDDistrictIDState/ProvinceIDCountryID(Location_ID is further related to the Address of the contact.)GUI has a single form to enter these details.On a save command details in all the tables -Area to Country- (individually) being inserted.& simultaniously Location_Table is also being inserted with the details.Following is the situation of being queried these tables:(1) GUI user can select an Area than the related details of ZIP .., ..., ...upto Country etc. should be loaded automatically (id it is previously stored by the user entry in the database.)(2) Contacts have to be retrived on the basis of Area, ZIP, .....County. (Necessary Groupings are required )Example:If Contacts are queried Country Wise then the Display should beCountry1State1District1County1City1ZIP1Area1Area2ZIP2City2County2District2Country2Please Guide.SuryaPrakash****************************************** This message was posted via http://www.sqlmonster.com** Report spam or abuse by clicking the following URL:* http://www.sqlmonster.com/Uwe/Abuse...0255a1765491f15*****************************************

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Designing (or Gathering Data From): A Hierarchical Database Using SQL

Feb 18, 2008

Hi All,

I am attempting to create a Visual C++ application based on displaying financial charts and am using SQL Express to store Stock information such as the Exchanges the stocks are traded on, the indicessectors they belong to and the Closing prices for as long as I can download data for. I am not proficient in C++ nor SQL and am using this project to learn both languages as well as making myself rich beyond my wildest dreams.

I have "designed" a database with the following tables:

tblDate_ 1 column clmDate (Primary Key, smalldatetime, NOT NULL)

tblStockExchange_ 4 column clmStockExchangeID (PK, int, NOT NULL)
clmParentID (int, null)
clmStockExchange (nvarchar(50), NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)

tblMarkets_ 1 column clmMarkets (PK, nchar(20), NOT NULL)

tblIndices_ 1 column clmIndices (PK, nchar(50), NOT NULL)

tblSectors_ 1 column clmSectors (PK, nchar(50), NOT NULL)

tblMarkets_Sectors 3 columns clmMarkets_SectorsID(PK, int, NOT NULL)
clmMarkets_ (FK, nchar(20), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)

tblSecurities_ 4 columns clmEPIC (PK, nchar(10), NOT NULL)
clmSecurity_Type (nchar(5), NOT NULL)
clmSecurty_Name (nchar(50), NOT NULL)
clmSectors_ (FK, nchar(50), NOT NULL)

tblSecurities_Indices 3 columns clmSecurities_IndicesID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmIndices_ (FK, nchar(50), NOT NULL)

tblSecurities_Date_OHLCV 8 columns clmOHLCVID (PK, int, NOT NULL)
clmEPIC_ (FK, nchar(10), NOT NULL)
clmDate_ (FK, smalldatetime, NOT NULL)
clmOpen (float, NOT NULL)
clmHigh (float, NOT NULL)
clmLow (float, NOT NULL)
clmClose (float, NOT NULL)
clmVolume (float, NOT NULL)

Why so many tables? perhaps you should put some more in...


This was the only way I could work out how to store one-to-one and one-to-many relationships required for:

- Many closing prices for many stocks
- Stocks belonging to many indices
- Stocks belonging to only one sector
- Stocks belonging to only one market (MainMarket or AIM for LSE)
- Stocks belonging to only one Exchange (I am aware of dual listed stocks but one thing at a time)

Why nchar's and not nvarchar's?

Because I didn't realise the benefits of nvarchar's until recently. How can I change this a loose the extra spaces in the cells.

Why do some tables have IDs and others don't?

I decided to put ID columns in for tables that didn't have obvious Primary Keys - if someone could explain the advantages if ID columns I would be grateful.

To the SQL Professional's eye there will be some obvious things wrong with this design and your criticism is welcome. The database I have is achieving what I would like it to do; I can plot charts using the data but I have ran into problems when trying to create a TreeView control which is what I would like to use as a navigational tool in my application.

It would seem that pulling hierarchal data from a relational database, to pass to the TreeView control, is a tricky task to say the least. I have found many articles online which discuss how to do this (using an Adjacency List Model or Nested Set Model) but they define a fairly simple example at the beginning (based on fruit or electrical goods) but don't appear to talk about gathering data from an existing relational database or changing an existing relational database so that it is more suited to storing hierarchal information. I have Joe Celko's - Tree and Hierachies in SQL for Smarties but sadly this fine material is a little beyond me!

I would like the hierarchy to look like this:

StockExchange

Market

Sector

Stock
Indices

Sector

Stock

I have written three queries to get the StockExchangeMarketSectorStock information individually from each table but am struggling with ways to put all the rows together, add left and right values (Nested Set Model) then run queries against this to get individual nodes to pass to the TreeView control. Therefore is there something I need to add to the original design?

Any help would be greatly appreciated.

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Designing A Compact Database For Mobile Device

Apr 4, 2008

Hey guys,

So I started an SQL CE database for use inside a mobile application. I used SSMS to create a .sdf file (because if I let Visual Studio do it, SSMS can't open it because it will be version 3.5).

The reason I wanted to use SSMS is because I wanted to be able to design the database in design view, and populate it with initial information for the application to use. That means adding tables and rows.

The problem is, SSMS doesn't seem to have a design view available when working with CE databases. It also doesn't seem to have a feature for adding rows into tables. It's essentially as useless as VS2008 for designing my mobile database. It only lets me add tables, and I can't even do that visually in design view. I have to use those cumbersome forms.

Is there any way to design a CE database in design view? And add rows of data into tables? It feels like I'm overlooking something.

Note: I dont need to subscribe or publish the database. The mobile application just needs to use the database as a repository.

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SQL Server 2005 Express: The Database Principal Owns A Schema In The Database, And Can Not Be Dropped.

Jan 11, 2006

I recently added a new user to my database.  Now I want to delete that user, but I keep getting the error above.  What do I need to do to delete my recently added user?

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SELECT Permission Denied On Object 'TableID', Database 'Database', Schema 'dbo'

Mar 21, 2007


The error message:

An error has occurred during report processing. (rsProcessingAborted)
Query execution failed for data set 'TestID'. (rsErrorExecutingCommand)
For more information about this error navigate to the report server on the local server machine, or enable remote errors

The log file reads:

---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Query execution failed for data set 'TestID'. ---> System.Data.SqlClient.SqlException: SELECT permission denied on object 'TableID', database 'Database', schema 'dbo'.

***Background***

General Users got an error message when trying to access any reports we have created.
All admin have no problems with the reports. Users (Domain Users) are given rights (Browser) to the reports and the Data Sources (Browser) and yet cannot view the reports.

An error has occurred during report processing. (rsProcessingAborted)
Cannot create a connection to data source 'DS2'. (rsErrorOpeningConnection)
For more information about this error navigate to the report server on the local server machine, or enable remote errors


I'll add this from the report logs...

w3wp!processing!1!3/20/2007-11:43:25:: e ERROR: Data source €˜DS2€™: An error has occurred. Details: Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Cannot create a connection to data source €˜DS2€™. ---> System.Data.SqlClient.SqlException: Cannot open database €œDatabase€? requested by the login. The login failed.
Login failed for user €˜DOMAINUsername€™.

The user has rights via a local group to the report and data source (Browser rights) and the local group has been added as a SQL login.


I gave rights to the databases themselves instead of just to SQL and the error changed (Ah-ha...progress, but why!?!?)

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How To Export Whole Database Schema To Another Database But Not Include The Data?

Sep 21, 2007


I need to export a database, x, of a server, X, to another database, y, of a server, Y and I need export the database schema only, not include the data.
Does anyone know how to do that?
Many thanks for replying.

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The Database Principal Owns A Schema In The Database, And Cannot Be Dropped.

Feb 15, 2006

Trying to get my hands around all the new security features of SQL Server 2005. In Management Studio did something I don't know how to undo. I added a database role ReadOnlyRole and clicked the box next to db_datareader in the owned schemas box. Then I tried to remove the ReadOnlyRole and could not. How do I undo what I did? Is it possible?

The below is the TSQL that generates the my issue.



Use [master]
go
create database [test]
go

USE [test]
GO

CREATE ROLE [ReadOnlyRole]
GO

USE [test]
GO

ALTER AUTHORIZATION ON SCHEMA::[db_datareader] TO [ReadOnlyRole]
GO

drop role [ReadOnlyRole]
go

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Database Schema

Apr 28, 2005

What would be the best way to get the Schema from a complete database.

Thanks.

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Sep 9, 2005

hello,

here is my problem.
I have to rebuild database after crash. there is no backup. So
I did a bcp to get data from. But I do not have the original database so my question is how to get the full schema off the data base, tables,colomns,stored procedures etc...

thanks lot for any help.

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Mar 16, 2007

Hello All,

My project uses MS SQL server database and is not too big database (have aound 200 table).

Now I have to create Database schema for my database as my project needs to be integrated with some other product.

I don't know much about database schema and how to start with it.

Can someone please give me some inputs on following:

1) What exactly database schema should include?

2) How should I start creating the schema for my database?

3) Are there any tools for doing this?



Thanks in advance

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Oct 24, 2005

Hi. I would like to retrieve the table names of a database, the column names nad its contraints of each table in a database.. How can this be achieved???

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May 24, 2007

We currently have a product in which each client has their own Database. We adjust the connection when a user for that client logs into the system. This system has continued to grow and a good pace, but we have come to a point where failover is taking too long.



Refactoring the Database to handle multiple sites in a single database is not an option because of the time it would take to make the change. So, we are looking for another way in which this could be handle. One idea is to take multiple clients and place them in a single database using a schema to seperate them. (ex. Client A = server1.db1.schema1, Client B = server1.db1.schema2, etc).



Is there another option that would be better, or what kind of performance can we expect if we follow this path? Or, is there a way to decrease the failover time (it appears the problem is the startup of the database on the failover server)?



Thad

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Oct 26, 2007



We have a RS 2000 server with a over a hundred reports, and about half as many weekly and monthly subscriptions.
In reply to my request to upgrade to RS2005, the boss asked me today for a compete list of the reports, who subscribes to them, and their delivery frequency.

He was not interested in paying for a VB or C# development effort with the SOAP API that it would require to obtain a simple list from a SQL server database, since he already has SQL programmers on staff.

So how can I get this list? Anyone know of any demo code out there?

Forgive my sarcasm and Thanks in advance.

Herb

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Oct 23, 2007



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Is there any? or is there some other way of doing this?

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Sep 26, 2006

Is there a way for VS2005 to export the database schema of a .mdf into a .sql file? Preferably from a Web PRoject, not a Database Project, but right now I am anything but picky, so whatever works. Thanks. 

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Oct 15, 2007

SQL Database Schema Sync
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Nov 12, 2007

Hi all,
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Feb 4, 2002

Hi,

Can anyone help me to figure out how to generate the SQL Script that can produce the same database schema with the existing database?

I have tried the "Generate SQL Script" tool. However, it only creates the object such as tables, stored procedures, triggers and etc. I still have to create the database first in order to run that script. I have an existing database that has a 2.7 GB size (let's called this ABC Database). In a different server, I would like to create the same database with the ABC DB without having to restore the ABC DB. Bottom line, I would like to see the script creates the database along with all stored procedures, triggers and the size of the database will be 2.7 GB. Is it possible?


Thank you very much!
Jane

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Jul 10, 2002

MS SQL 6.5
NT

I have been asked to export the database schema (containing table names, field names, data types, field lengths, field defaults, nulls, etc) to an MS Excel spread sheet. "sp_help filename" provides some data but the format is difficult to manage.

All help with this matter would be greatly appreciated....


Thanks in advance.

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Jun 6, 2007

I can't believe I am asking this but I have been "requested" to.

Scenario:

Database based app installed on client site

Goal:

Protection of database schema.

Solution:

Obfuscate? - Any tools available?
Host db in secure location - Not going to happen!


Any thoughts?

DavidM

Production is just another testing cycle

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Aug 2, 2007

Hi Friends

We have a database that contains tables having 4 million records
Can you tell me a way to copy the schema of the Database to a new database.

Generate SQL Script...Is it the only option or can i use the DTS package

Which is the most reliable one?

Regards
Vivek

Vic

http://vicdba.blogspot.com

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Jul 20, 2005

Hello all,I am doing some research on database conversions. Currently, I aminterested in any information that would help me convert a database fromone schema to another. This could be changes as minimal as adding afield to a table, or as large as deleting tables and changingrelationships. Unfortunately, my experience with SQL Server is minimal.I know how to do a lot, but I do not know a lot of intricacies thatmost experts know. I know how to add tables, delete them, alterrelationships, add fields, work with stored procedures, take care ofsecurity, etc. I also know how to backup, restore, etc.The type of information I am looking for could be:1) Open source software that performs conversions2) Tutorials/books/<any reference> that would assist me in learningwhat I must to complete this task.3) Third party software that could be used on a large scale andwouldn't resort in unnecessary licensing cost if I was to deploy on thislarge scale.I greatly appreciate any information that could be provided me.To give you guys an idea of my experience level:I've been programming C# and .NET for a year now. I've also hadextensive experience in object-oriented design. I've worked with visualbasic, cobol (did I mention this? LOL), asp.net, php, javascript, andseveral other programming languages on an extensive basis. Whileprogramming is my speciality, I've strayed away from database work untilnow. I would greatly appreciate any assistance in researching this matter.Thanks ahead guys,Shock

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Jun 1, 2008



database schema seems just a tag ?

I have found some materials about schema, they said ,schema is seperated from owner.

But , no materials are talking about what things schema can do / how to programming with schema.

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