Relational DB Model For An Engineering Applicaiton
Aug 6, 2007
I'm not sure where to post this - but, I'm a DBA trying to do some modeling for a client developing an Engineering applciation.
There is a lot of interaction at the application layer between external systems and the database - I'm trying to find some ideas or templates of how others designing for a similar functionality did this.
THere are real-time displays for engineering equipment where the database must interact with different states of the equipment. The user enters search criteria for data stored in the database, and results and real-time attributes are displayed.
THis seems to be similar to a manufacturing model, but I'm struggling. I'm used to doing models for OLTP or business reporting databases. Part of the problem may be that there doesn't seem to be a good way to translate relational concepts to engineers. There are a lot of requests for bit fields.
Can anyone reccomend a reference I might look at to get some ideas on how to mesh the modeling of external processes with the database? A simple flow model doesn't seem to work (either technically or as a communication tool - I'm not sure which)
Hi,This question has been bothering me for some time. A lot of peopleseem to "think" XML is the king of data problems, and I've heard thatnext version of SQL Server is going to have a strong XML flavor,meantime, I seem to get the impression that a large number ofhard-core relational model gurus do not seem to be that impressed withXML (technical value of this extra layer seems to be limited whilebusiness value might be substantial for instance, more software work,more disk space requirement etc. etc.). What's your take on this?Generality or specifics, all welcome. One specific question is, howcan XML supplement relational model?Thanks.
I have a large database with complex relations and I just can't figure out how to delete a single record and all its relations across database (not to mention that I can't understand why can't the DELETE statement work just like the SELECT).
It would be impossible to let you know the structure through this message, but let's say that I have 5 tables in which there are relations like this (all the tables contains a unique ID for each record, but not all contains info of the main record):
Production -> ProductionTypes Sales -> ProductionTypes Production -> Sales Sales -> Personnel Personnel --> Orders Orders --> Financial
I hope we agree that if I delete the ProductionID.Production directly, there will be no way to know which Financial.Commission I have to delete because I just can't insert the ProductionID in every table on the database.
What do I have to do ? I just couldn't find any solid information regarding this subject on the net.
Hi all, I am trying to create a diagram for our database, during the creating, I create some of the relationships which were not there(basically our original database is not relational database, that's why I am doing it) So sometimes I have to chage data type in order to create a relationship for the coloumns in different tables. i.e. change char(16) to varchar(7) (I checked the field that make sure all the data in this field is <= 7 characters)
But when I saved the diagram, there is an error message that state: Errors were encountered during the save process. Some of your database objects are not saved on your diagram.
'agent' table saved successfully 'VisitUSA' table - Unable to create relationship 'FK_VisitUSA_agent'. ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK_VisitUSA_agent'. The conflict occurred in database 'CMC', table 'agent', column 'AgentCode'.
What does that mean? is it caused by some of the agentcode data in VisitUSA table which is not in agent table? Thanks! Betty
Does anyone know of a way to determine the code of a stored procedure that was built with encryption? I inherited a db with many of these and we are not sure which version of the source code exists on the server. Alternatively, can I compile a new SP and compare it to the old one in any way other than testing lots of data?
1. Is there a stored procedure, or a way to reverse engineer a database? I have a lot of legacy dbs that I have inherited that I need to create a recovery system for. Part of this is creating the scripts to build all of the tables and I would like to automate it.
2. How can I output the results of a stored procedure to a text file? When I run sp_configure I would like that information to go to a text file.
Hi,I'd like to reverse engineer the schema definitions in the SQL Serveron a daily basis and store them in a version control system.Could anyone please let know if there are any tools to reverse engineerthe entire schema definitions in the SQL server. I'd like somethinglike the perl script 'dbschema.pl' for the Sybase ASE.Regards,Dellit.
In Reporting Services, is it possible to display a field in Engineering Notation or Scientific notation? I guess can do it by adding a format code, can somebody tell me the format for those notations.
hello, I am beginner for asp.net and sql server. I used Sql server manegement studio full version and I exported my aspnetdb which was created by VS2005 to my host sql server. I have a question: relational tables are not relational no longer. I noticed that when I created database diagram. what is wrong by exporting? thanks for your helps...
I need to develop a language specific dwh, meaning that descriptions of products are available from a SAP system in multiple languages. English is the most important language and that is the standard. But, there are also requirements of countries that wants productdescriptions in their language.
Productnr Productdesc Language 1 product EN 1 produkt DE
One option is to column the descriptions, but that is not very elegantly. I was thinking of using bridge tables to model this but you have to always select a language in a filter (I think)..
I'm thinking of a technical solution, such that when a user logs on, the language is determined and a view determines whether to pick a certain product table specific for a certain language. But then I don't have the opportunity to interchange the different language specific fields in a report (or in my case PowerPivot).
We have our Production server having database on which Few DTS packages execute every night. Most of them have Bulk Insert stored procedures running.
SO we have to set Recovery Model of the database to simple for that period of time, otherwise it will blow up our logs.
Is there any way we can set up log shipping between our production and standby server, but pause it for some time, set recovery model of primary db to simple, execute DTS Bulk Insert Jobs, Bring it Back to Full recovery Model AND finally bring back Log SHipping.
It it possible, if yes how can we achieve this.
If not what could be another DR solution in this scenario.
I have MS Time Seeries model using a database of over a thousand products each of which has hundreds of cases. It amazingly takes only a few minutes to finish processing the model, but when I click Mining Model Viewer to view the models, it takes many hours to show up. Once the window is open, I can choose model for different products almost instantly. Is this normal?
hi !!i have a question about the connected and disconnected model to access the Sql server DB.......i know that there is better to choose one rather than the other in some situantions and there is no better model in all cases...... os i hope you can help me to decide what shall i choose...i will use the DB to connect to Web services and read data from the DB and wrtie some data back.......i do not know that to use ..... i hope you advise me and tell me about the rules that will allow me to choose what model to choose .... i appreciate your help!!Thanks !!!
I have a membership database and a profile database with a userid column in both. The foreign key is in the profile database where i want a persons profile details to go like location,occupation and what not. How do I make it so when a new user registers a userId is created in the profile database that matched the userid in the membership database so i can query out profile details based on a registered members userid?
Hi all! I am working on a piece of SQL at the moment and I'm getting a little confused. I have 3 tables: Items, Attributes and a table linking them. I have 5 attributes and an item can have any of the 5 attributes. So my linking table holds the ItemID and the AttributeID and there can be 1-5 entries for each Item. A user can search for items based on Attributes; so they can tick 5 checkboxes that represent the 5 Attributes. So I need to build a query based on their choices. At the moment I'm using:Select * FROM ItemsINNER JOIN linking on Link_ItemID = Item_IDWHERE Link_AttributeID IN (10, 13, 17)But this brings out the Item that have either AttributeID of 10 or 13 or 17 whereas I need it to pull out ONLY items that have a AttributeID of 10 AND 13 AND 17.Can anyone help with this query? Sorry if this is badly worded. The solutions is prolly something really simple I have overlooked... :SI've also tried:Select * FROM ItemsINNER JOIN linking on Link_ItemID = Item_IDWHERE Link_AttributeID = 10 AND AttributeID = 13 etcBut obviously that won't work! :s
Table1 contains ID,Name Table2 contains ID,Marks,Foreign Key ie Primary key of the table Table1.
Give me an information how to create these two tables in SQLServer (I know how to create a table but i don't know how to create a table which includes Foreign Key.)
Then using Dataset i want to display the records as Name,Marks which are stored in two tables.
I have studied that in ADO Join query and record set object is used but it gives a problems and it is not good when we want to transfer the data between two applications or pages but dataset solves all those problems.
what is the difference in making relational databases in SQL vs. Access? Do you need to make them if you will be using ColdFusion? What do the other fields in minor tables need to be in order to connect them to a major table when it will all be based on a number that is in the major table? i'm kind of confused on this issue...Thanks!
I created the third table to hold the employeerenewal dates, I did this because I cant have repeating vaules in the primary table. I am just making sure that my course of action is the correct one. The purpose of the Employeerenewals is to give the users an indication that a certain renewal has been processed, because in the past there was several hundred that were not processed. The problem was that the users had no way of knowing this. What I was thinking was having the primary table calculate a renewal date based off the finalsuit and show the results in the Employeerenewals with a yes of no drop down. Now the yes or no drop down box will be give the users their red flag if the renewals have been processed or not.
Hi I am developing a website current and i have a database that seems to be growing very rapidly.. I would like to ask if anyone knows of any good tutorials/examples on relational databases? Also does anyone know of any good database design tutorials/examples?
If it helps i am using Microsoft Visual Web Developer
My question: How to have an unknown number of authors returned for a list of books, with the multiple authors being returned on the SAME row as each book
My table structure:
Table A - Books ------------------- BookID | BookName ------------------- 1 | Book One
Hi,I have a very simple question.In what cases are relational databases necessary?Are they really necessary in cases where only asingle type of query is to be performed based on one uniquefield or can we just put all fields together in a single databaseand just access them through that unique field?
I have a few questions for you guys. I have a client application that can be offline or online. While offline, records can be added and need to be later synced to production.
I will use rda to pull the table down, and this is working fine. Now what if I have multiple tables where I want a foreign key relationship?
With rda I can only pull down one table at a time from everything I've read. Now say create a constraint after pulling the two or more tables down. While in offline mode I create a new record on two seperate tables with foreign key/primary key relationship.
When I do the push to the server will it automatically update the foreign key reference (locally) to the right one on the production server? Or will I get a duplicate primary key error? On the production server the primary key will be different because of the identity. This is very important because I will have multiple clients.
Hi, not sure if this is the right forum for this question. I am creating relational tables for the first time in sql server express. I will have an orderItems table and an orders table. the MenuItems table is the problem. It is a catalogue of books. There will be about ten columns. all are unique to each book. i.e isbn number, title, author, publisher etc. but ten columns seems to be quite cumbersome. it may be easier to break the table down into two tables (i.e. primary details and secondary details perhaps) However to populate the table in the first place it would be easier to have it as one table instead of opening and closing 2 tables Adding the odd book to the two tables in the future would not be a problem. so the question is can i create a table and then brak it into two relational tables afterwards. If so how do i do this. this is my foirst go at relational tables and i am still trying to get a handle on visualising them. If my logic is up the wall please let me know.... Nick
I am just now starting the switch from .NET 1.1 to .NET 2.0. I really like the new way of using the SQLDataSource and setting up Views declaratively as opposed to doing it all in code, which brings me to my question.In some of my applications I have a single Stored Procedure return multiple result sets to a single DataSet where I have a DataRelation set up. Then I can have nested DataGrids that use the GetChildRows() method to filter the results to display the hierarchical data. I would like to do something similar with the SQLDataSource and GridViews but haven't found a way to get multiple result sets.One thought I had was to create a Strongly Typed Dataset and then use the ObjectDataSource object, but I still didn't see a way to get child rows out of the datasource. I've seen an example that uses a <FilterParameter> to get nested data, but there is an extra trip made to the server for each parent item as it just put an extra parameter in the WHERE clause of the query.
This is a bit of a trivial question, since I know how to actually create the code in SQL. Hope this is the right section to post it in too, since it sort of concerns design I guess..
My problem is how to I represent the following SQL query in relational algebra:
SELECT * FROM Staff;
Since I'm using SELECT, I assume I use selection to represent it, so would it be as "ó(Staff)" [using the sigma symbol, in case it doesn't show]? But as I'm not specifying a predicate since I wish to select all fields in Staff, would it be simply represented as "Staff"?
I appreciate any help... it's been baffling me for a while
Hi Please help for this simple problemDTS Transfer or any other method?I have Customer_Order Table and customer_Order_Details Table.For OrderID = 1, I have 3 rows of Order Details.I want to transferCustomer_Order Table for OrderID 1 in DTS, the system should transferOrder Table as well as Order details table Rows for ORderID =1.How to customize in DT or is there any way to get this data to transferfrom source DB to Dest DB?KAMAL KUMAR V--Posted via http://dbforums.com
I understand the basics for doing an insert. Their seems to be many ways of achieving the same thing in .net. I have used the tableadpaters and sqlcommand functionality to achieve this. My one question is how foregin keys should be created in associated tables. EG so if i create a new record entry in one table and the primary key for that entry is a foreign key in another table, do I need to call 2 table adapters, or run 2 sqlcommands(taking the primary key from the first traction and use this in the next transaction)?
Any help or direction for some good tutorials on this would be much appreciated.
