Database Design Idea
May 23, 2007
Good morning
In messages system i have table to store messages and another table to contain the links which the message is posted through
Now i want to delete a link but i don't want to delete the message sent through this link
The problem:
When displaying the message sent what will be fount in the link field (i.e for the deleted link)
I tried to move the deleted link data to separate table (EX: deletedLink) but if the user added new link with the same name as the deleted link? The problem mainly in when displaying the message sent i will have the same link twice one for the deleted and the other for the added one.
If any one has a good idea for doing that please reply to me
I don’t want the sql code
I want just the idea
Thanks
mohammed Al maghraby
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May 23, 2007
Good morning
In messages system i have table to store messages and another table to contain the links which the message is posted through
Now i want to delete a link but i don't want to delete the message sent through this link
The problem:
When displaying the message sent what will be found in the link field (i.e. for the deleted link)
If any one has a good idea for doing that please reply to me
I don’t want the sql code
I want just the idea
Thanks
kind regards
mohammed Al Maghraby
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Feb 8, 2006
we are creating a database of sales agents. Basically I have a tableof about 35,000 people, a second one with 8000 offices, and a thirdtable of around 400,000 transactions done by those 35,000 people inthose 8000 offices. We get new data everyday that just updates theexisting tables with the updated rosters and transactions.I want to build a quick website where our recruiters can look up thosepeople and keep contact info and all that fun stuff but also pullnumbers on those people. Like* How Many Transactions that Sales Agent did last year* Rosters by office showing productionThe goal is to click the users name and see all the percentages,commissions and data like that which we will get by searching thattable of transactions by the agents ID.the problems I see right away are stuff like* If I were to pull a report showing all agents in a single office withtheir number of transactions next to their name, that is a HUGE query.It would have to search the 400k worth of records for each of theagents on just that one report.A suggestions I was givenI was told by a fellow programmer a better way to do this is to have anadditional table that houses stats info and have the SQL server runautomated reports everyday at say midnight where it updates that table.This table could show stuff like** number of transactions for each user** avg sales price on all transactions for each user** avg commission on transaction for each userlet me know your thoughtsthanks in advanceMonkey Girl
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Jan 7, 2007
create from dbo.fromExampleasfrom dbo.Customers cjoin dbo.Invoices ion c.CustomerID = i.CustomerIDnow you can use it as follows:select c.CustomerID, i.InvoiceNofrom dbo.fromExampleI find I reuse FROM clauses alotand reusing a "base query" requires writing a very large and cumbersomeselect clause
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Dec 18, 2006
Hello,
I'm creating a website for a student organization at my university. Basically, I have an Excel file with a list of contacts that the members of our organization need to be able to search on our website.
The only field that I need our members to be able to search is "contact location." So for example, a member might want to know if our organization has any contacts in Spain, so the member would type "spain" into the "contact location search" field" and would get results.
I really don't known where to turn... I need the easiest thing that would be manageable for a novice. It doesn't need to be an intense search function; just something to make the website functional (so it obviously needs to be uploadable to a server; the server has PHP capability...no idea if that has any relevance). I've been searching around all day and have come across potentials like PHP, SQL, XML, etc. but have no idea which way to turn... I have Office and Adobe Studio programs at my disposal.
Thank you all-powerful and all-knowing web gods! I owe you my deepest gratitude!
Mikey
:beer:
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May 13, 2015
I have a scenario like below
Product1
Product2 Product3
Product4 Product5
Product1 1
1 0 0
1
Product2 1
1 0 0
1
Product3 0
0 1 1
0
Product4 0
0 1 1
0
Product5 1
1 0 0
1
How to design tables in SQL Server for the above.
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Feb 13, 2002
Ok, I'm doing a football database for fixtures and stuff. The problem I am having is that in a fixture, there is both a home, and an away team. The tables as a result are something like this:
-------
Fixture
-------
fix_id
fix_date
fix_played
----
Team
----
tem_id
tem_name
-----------
TeamFixture
-----------
fix_id
tem_id
homeorawayteam
goals
It's not exactly like that, but you get the point. The question is, can I do a fixture query which results in one record per fixture, showing both teams details. The first in a hometeam field and the second in an away team field.
Fixture contains the details about the fixture like date and fixture id and has it been played
Team contains team info like team id, name, associated graphic
TeamFixture is the table which links the fixture to it's home and away team.
TeamFixture exists to prevent a many to many type relationship.
Make sense? Sorry if this turns out to be really easy, just can't get my head around it at the mo!
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Oct 29, 2015
I actually work in an organisation and we have to find a solution about the data consistancy in the database. our partners use to send details to the organisation and inserted directly in the database, so we want to create a new database as a buffer database to insert informations from the partners then make an update to the main database. is there a better solution instead of that?
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Feb 24, 2006
Hello everyone,I have a webcontrol that uses database-structures alot, it uses the system tables in SQL to read column information from tables. To ease the load of the SQL server I have a property that stores this information in a cache and everything works fine.I am doing some research to find if there are anyway to get information from the SQL server that the structure from a table has changed.I want to know if a column or table has changed any values, like datatype, name, properties, etc.Any suggestions out there ?!
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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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Aug 16, 2007
Hi All,Can u please suggest me some books for relational database design ordatabase modelling(Knowledgeable yet simple) i.e. from which we couldlearn database relationships(one to many,many to oneetc.....),building ER diagrams,proper usage of ER diagrams in ourdatabase(Primary key foreign key relations),designing smallmodules,relating tables and everything that relates about databasedesign....Coz I think database design is the crucial part of databaseand we must know the design part very first before starting up withdatabases.....Thanks and very grateful to all of you....Vikas
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Sep 27, 2007
Hi All,
I am designing database where few of the master tables will reside in different database or in case different server. Scenario is
Server "A" with Database "A" may host the "Accounts" table.
Server "B" with Database "B" may host the "Product" table.
I am designing database "Project" which will hosted in Server "A".
My application requires this master tables [readonly access] as data inserted in my application refers this tables. Also there are reports to be generated which refer this tables.
How do i design my database and sql queries?
I am thinking of approach of having equivalent tables created in my database and writing service which keep tables in my database in sync. This will ensure good perfomance during transaction and reports as they will need to refer this table locally as opposed to different database or different server.
Any thoughts on above approach?? or any better/standard way for such scenarios ?
Thanks in Advance. Your inputs will be of great help.
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Apr 12, 2007
Hello:
My client has a db with the following structure:
Online US Searchable Map of the 50 US States. Users search criteria is the following: Query records by selecting state, county, then record. Each County table has 10-20 tables. All databases combined = 500MB and TLogs = 100MB.
How would you re-design a relational DB where users could query data by state-county-record. Currenty the DB's are created by the County of each state which creates hundreds of DB's in SQLServer with no realtionship to each US state. What would be the best design to ensure good performance, data integrity and maintenance? Would you create 1 DB with all 50 states, create 4 DB's and divide by region(N,S,E,W), 50 DB's of each state or leave it as is with each county it's on DB? Any suggestions would be appreciated.
thx
rob
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Mar 4, 2008
i have a table FORUM_REPLY it contain follwing fieldsquest_id,answer_id, reply_user_id.i want who is post most answer.so i need reply_user_id and max(no_of_answer).but following query given reply_user_id and no_of_answer onlySELECT reply_user_id,count(answer_id) as no_of_answer FROM FORUM_REPLY GROUP BY(reply_user_id)How to get max_no_of_answer?
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May 21, 2001
Hi all,
I am new to the DTS game - or at least to trying to do anything other than transfer rows between databases with identical structures.
I now need to create a far more complex DTS package to transfer data between an SQL Server database (I am using SQL Server 7.0) and an Oracle database. I have no trouble in making the connections and performing simple DTS's beween the two.
However, my current task is more complicated.
Problem 1:
In one database I would store fifty values as 5 five records each containing 10 values (i.e. has ten fields). However, in the other database these fifty values would all be stored as one record (i.e. one row with 50 fields). How could I go about creating a DTS to transfer this information?
Problem 2:
These values should only be transfered if certain conditions are met in an another unrelated table. For example, a flag in another table indicating that transfer of the said values should occur.
Any help with either of these problems would be much appraciated.
Thanks in advance,
Ross
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Nov 16, 2000
When one of the users log into the database via a thrid party application
they receive an error message:
2000/11/16 10:40:13.84spid51Error : 605, Severity: 21, State: 1
2000/11/16 10:40:13.84spid51Attempt to fetch logical page 7832 in database 'highview' belongs to object '1241055457', not to object 'application_data'.
2000/11/16 10:45:07.68spid46Getpage: bstat=0x1008/0, sstat=0x80002110, disk
2000/11/16 10:45:07.68spid46pageno is/should be:objid is/should be:
2000/11/16 10:45:07.68spid460x1e98(7832)0x49f900e1(1241055457)
2000/11/16 10:45:07.68spid460x1e98(7832)0x4810b86f(1209055343)
2000/11/16 10:45:07.68spid46... extent objid 0, mask 0/0, next/prev=0/0
2000/11/16 10:45:07.68spid46... retry bufget after purging bp 0x2da7e060
I tried running DBCC checkdb, newalloc,& checktable to fix the probelm and than droping the table and rebuilding it but not success, any suggestion are
more than welcome.
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Jun 21, 2002
If anybody can suggest the most efficient way to "page" the output from a big and wide table (about 7000000 records) in order to display on the web in the user requested sort order. Sort order could be on at least 7 different columns from 50 of returned.
I need to find a solution to move to the next and previous page.
Any Idea?
Dim
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Jul 23, 2004
what if I took this trigger and based it on a view rather then a table
CREATE TRIGGER TerminationUpdateTrigger ON EmployeeGamingLicense
FOR UPDATE
AS
INSERT INTO TERMINATION(Status,[TM #],LastName, FirstName, [SocialSecurityNumber], DateHired, Title)
SELECT STATUS, [TM#], LASTNAME, FIRSTNAME, [SSN#], HIREDATE, JOBTITLE
FROM Inserted
WHERE STATUS = 'TERMINATED'
CREATE VIEW dbo.Update_Terminations
AS
SELECT STATUS, TM#, LASTNAME, FIRSTNAME, SSN#, HIREDATE,
JOBTITLE
FROM dbo.EmployeeGamingLicense
WHERE (STATUS = N'TERMINATED')
Base the Trigger on this View rather then on the Table itself????
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Apr 27, 2008
Hi I'm new to sql and it would be great if someone could give some idea on how to do the following
This is the relational model:
Department(DeptNum, Descrip, Instname, DeptName, State, Postcode)
Academic(AcNum, DeptNum, FamName, GiveName, Initials, Title)
Paper(PaNum, Title)
Author(PaNum, AcNum)
Field(FieldNum, ID, Title)
Interest(FieldNum, AcNum, Descrip)
The question is :-
Which academics have the largest number of fields of interests? Return their academic number,
given name, family name, institution and total number of fields they are interested in. Your must use a
subquery in the sense that you must use 2 sql statements and use any of the following to connect both:-
1)Exists
2)Not exists
3)IN
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Sep 18, 2006
I have a table call CLIENTE and another table call ENDERECO where the CLIENTE table has the FOREIGN KEY of the ENDERECO table.
When I try INSERT COMMAND in C# this message is show.
The instruction INSERT conflicted with a constraint of FOREIGN FUNDAMENTAL "FK_CLIENTE_ENDERECO." The conflict happened in the database "E:ARQUIVOS DE PROGRAMASMICROSOFT SQL SERVERMSSQL.1MSSQLDATALINETEC.MDF", table "dbo.I ADDRESS", column 'IDENDERECO.'
The instruction was concluded.
I am a "little" lost.
Thanks.
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Mar 21, 2007
Hi there,
I have number of tasks in my control flow most of them are execute sql task. I want to update one of the column in my table when anyone of the task in the control get fails?
Please let me know if anyone have an idea how to do this.
Thanks and Regards
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Oct 20, 2006
Hello, I am designing my first database with 5 tables for a demo project and am not sure if it works. an example below.2 of the many things I want visitors to the site to do is find a company by the industry sector they belong to,..andwhat sort of service or products they can supply. For instance a Employment agency maybe under professional services Table 1 Customer Customer_ID = primary key,,,, Sector_ID = Foreign keyComapany Name, Address, Phone, Postcode etcTabel 2 Industry SectorsSector_ID = primary key,,,,Customer_ID= foreign key banking, Education,Prof Services, etc Table 3 Trading ActivityTrading_ID = primary key,,,,Sector_ID = Foreign key, Products_ID= FkEmployment Agent, School, Lawyer etcTable 4 ProductsProducts_ID = primary key,,,,Trading_ID = foreign keySupply frozen foods, transport services, sports goods, etc Table 5 Account Account_ID = primary key,,,,Customer_ID = foreign keyAccount Name, Credit Limit, Payment Terms, Open date, Account contact etc One big point of confusion is, can I have the Customer_ID from the principal Customers tablein every table as a foreign key or must the tables be chained together one after the other as such. Advice appreciatedThanks
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Apr 10, 2007
Hi,
I need a hand with designing a database.
I am collecting results from a survey which has the following questions:
Call ref? How did you place your support call? Were you satisfied with the amount of time you had to wait until getting acknowledgement of the support call placed? 1 = very satisfied and 10 = very unsatisfied. How happy were you with the customer service you received upon placing the support call? 1 = very unhappy and 10 = very happy.How satisfied were you with the amount of time you had to wait until you heard from an engineer? 1 = very satisfied and 10 = very unsatisfied. How satisfied were you with the time taken to get your problem/query resolved? 1 = very satisfied and 10 = very unsatisfied Did you feel the engineer had enough knowledge to deal with your call? 1 = very good and 10 = not very good Overall how satisfied were you with the support call placed? 1 = very satisfied and 10 = very unsatisfiedIs there anything we can do to improve the quality of the support and service you received?
I want to store this in a database. Obviously I want to use best practice for design, normalisation etc. The stumbling block I am coming accross is the fact that each question has a number and each question has a score from 1 to 10 and storing this in the database. Any help appreciated!
Thanks
Andrew
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Apr 26, 2007
I am creating database tables for company testimonials. Database columns: name, position, companyname, comment, service we provided.
My question is that for each company - may have a multitude of different services from us, and different people with different positions in the same company may make comments.
What is best practice for putting this db structure together?
Thanks
Andrew
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Oct 29, 2007
Can anyone tell me how can i design database architecture for the Table Category & Product...so that i can make N-level entity relation....I have database in SQL SERVER 2000.
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Jan 30, 2008
I guess I am confused about something and need some help. I am looking at a database schema for about 20 tables in a database. I noticed that the firstcolumn in each table Is some type of Id. For example StudentId,TestId etc.Where the Id is a unique numeric sequential value.
So I have some questions?1- Do these Id's act as what are called indexes for the table?(Unique indexes)2- If the answer to 1 is correct, then how do I create these unique indexes? Is it as simple as declaring the Id column as the primary key and that this value will be generated automatically upon insert? 3- Is it necessary to have an Id column for every table, or may I only do it for a few of them?4. In relation to Question2, what do I need to do, so that the Id column will automatically be created when someone inserts a value into the database table with an ID column.
For example here are two sample tables
StudentsInfo
StudentId<PK> Name Age 1 Mark 33 2 Jill 23 3 Mary 25
PersonalInfo
Name<FK> SocialSecurity Address MajorMark 324-444-3342 15 Elm ArtJill 888-888-8998 21 North ScienceMary 876-777-2344 18 Byle Music
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Apr 17, 2008
Hi,I am planning to create a technical forum for our college. could any one give me an idea of how to design the database for the forum. what table and columns i should have?
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Nov 3, 2004
I have got a design issue.I have got 4 tables,having relationships.Now,user will edit records and save them,but I want to save the values which were exixsting before they were edited and saved.Implying,if a record is edited 50 times,then the values of each edit needs to be saved.How best ,can I achieve this.
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Oct 20, 2005
Hi !!We are designing a system where we ask people for their interests and store in into the database and send customize email. Following are the questions:1) Should we use Identity column as Primary Key and CustomerID column? OR we should create Custom CustomerID and use it as Primary Key? (I have read few articles about Identity column as Primary or not Primary, but need little advice what to accept)2) We have a Tables called : Interest & Customer_InterestCustomer Table:CustomerID, Customer Name, Address, Email, Signup DateInterest Table:InterestID, InterestNameCustomer_Interest: (Need suggestion for How to design this)Should Table be design like:Option1: CustomerID, InterestIDOption2: CustomerID, Interest1, Interest2, Interest3, Interest4i.e.Lets Say: Customer table has CustomerA, CustomerB, CustomerCInterest table has Interest I1, I2, I3, I4Lets Say CustomerA Signedup for Interest I1, I2, I3 and CustomerB signed up I1, I4As per Option1:Customer_Interest Table witll haveCustomerA, I1CustomerA, I2CustomerA, I3CustomerB, I1CustomerB, I4ORAs per Option2Customer_Interest (Where Interest Column is bit column..... 1 = Signed up, 0 = Not Signed upCustomerA, 1, 1, 1, 0CustomerB, 1, 0, 0, 1Which way we should design? 3) If we select Option2, and if we are displaying data in ASP.NET Page, will there be any issue if we use 3 tier architecture?Thanks !!!
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Nov 10, 2005
I am designing an inventory database in which I need some help, I have the following entities:ItemsNotebookWireless CardADSL Modemetc...ModelsAcer centrino 1.6Acer centrino 1.733COM 4x125 hours Wi-fi access50 hours Wi-fi accessetc... PackagesPackage A:Acer centrino 1.63COM 4x125 hours Wi-fi accessPackage B:Acer centrino 1.733COM 4x150 hours Wi-fi accessI made a table for the items having the following fields: Item_ID, Item_Nameand another for the Models having: Model_ID, Model_Name, Item_Type(Foreign Key to Items table)up to this point is this correct?About the packages table, I don't know if it is correct to have a field for each model (one for notebook, other for modem, and other for wireless card) like this it would be like having 3 foreign keys to the same table but nothing distinguishes themI don't know how to relate the packages and the models table.Any recommendations for a proper design for those entities?
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Dec 20, 2005
I am creating a knowledge base. I want the user to be able to choose a category such as Hardware, Software, Etc. then I want them to be able to choose what type of software such as word, excel, ets.
It will then display in a gridview problems, solutions, submitted by, last updated, and review date.
The gridview will allow users to update solutions and I would also like the ability for technicians to be able to add new Problems/solutions.
What would be the best way to handle this?
Any tips are appreciated.
Rick
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May 2, 2000
I have requirement to create table of 100 columns. Should i create 100 columns in one table or i should create three coulmn table with column id, column desc, column value with 1 row in 100 column table = 100 row in 3 column table. Which will be faster & efficient in performance, io & size.
Thanks
Manoj
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Dec 13, 2000
The database will provide content management for an Intranet site.
On the site we have a number of articles which are categorised. Each categories can also have sub-categories.
The relationships would seem to be
Category---->Sub-Category----->Article
A category has one or mant sub-categories. A sub-category has one or many articles.
However some categories have articles but are no sub-categories.
Should I create a further relationship between Category and Article to cater for this instance or should their be a dummy category record in this instance?
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