Database Structure
Nov 1, 2004
This is a sort of database structure question that could I guess apply to any type of database...
Say I have 4 production lines and I want to log serial numbers on the start of every line and off the end of every line.
Is there any advantage in having a separate table for each Production Line and serial number logging point? (i.e. t_Line1Start, t_Line1End, t_Line2Start etc) or is it just the same as having one big table and having a LineNumber field and a StartEnd field?
Is SQL Server just as happy dealing with fewer transactions to several tables as it is to many transactions to one table?
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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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Jan 6, 2008
Hi,
I have a complicated sql server mobile database (.sdf) and need to create a SQL SERVER database with the same tables. How can I do it without scripting the whole thing? I thought of using the views.information_schema databases, but it is still a lot of coding.
thanks
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Sep 25, 2007
Hello I am a final year student and for my final year project I have decided to try and create a price comparison website due to the fact that i feel it would be a good project to work on and develop my technical skills in C# and microsoft sql server 2005, since these are mainly the two programs I would say i have more experience with. Basically I want to create a website such as www.pricerunner.com. At this point in time i have started playing around with how i feel the database will look, in terms of tables and columns, below is what i have produced;
Company
Company_ID
Company_name
ADDRESS
Website link
contact
Products
Product_ID
Product_name
Product_Category
Product_Price
I am now stuck as how i will link each company with a product bearing in mind a company will stock different categories of products, also do you think i need any more columns in any of the above tables, as well as am i missing out on anything, I am hoping someone with more knowlegde than myself can shed some knowledge on my problem, thank you.
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Aug 10, 2005
I'm sure there is a simple way to do this but I cannot think of it.I have an ASP.NET application that I am publishing to a webhost. I have chosen to use FTP to copy my files (aspx, etc.). They work as far as links etc. Now, the next step is to create my SQL database on their server as they instruct, which I have done in name only. (Oh, if it makes a difference, I access the hosting service using Plesk control panel.) Is there any simple way to get my database structure from my PC to the host server? All responses welcome. Thanks.
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Oct 9, 2001
Hi All,
I need to get some info on how I can get the script of the entire database stucture. I need to write a procedure to do this. I know in SQL Server I could get the script in a mouse click. But I need to write a procedure to do the task. Is there a package in SQL Server that I could use to accomplish this task?
Any thoughts will be of help.
Thanks in advance.
sj
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Sep 2, 1999
I am very new to SQL server, and am completely stumped here. I need to transfer the data from an old database to a new one (both SQL Server 6.5 DBs.) The only problem is that the database has been restructured, and I can't for the life of me figure out how to get the data imported. I am working on manually making all of the structure changes, but there must be a better way. Any ideas? Thank you SO much!
Jeff
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Apr 9, 2008
Hi,
I have a question. I want to build a db for the following entities:
drivers
cars
companies
each driver nay has a car (NULL or carId)
each driver belongs to company
each car belongs to company
The db structure I built is:
car(carId, companyId)
driver(driverId, companyId, carId)
company(companyId)
The problem is that in this structure driver from company a can have a car from company b.
but this situation is not possible.. How can I prevent such situation??
tnx
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Jul 8, 2006
Is there a way I can copy my SQL 2000 database including procedures, views tec. the whole works but not the data in any table.
I want to share with a relative a copy of my application (web based) he has his own SQL 2000 server but I do not want to give my data just the database so the application will run and he can start inputting his own data.
How can I do this like a backup which has everything but with no data.
I tried scripting it using the EM but it did not give me everything just the system db's
Thanks
Xavier
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Jan 11, 2008
I'm designing a web application that acts as business management software for many small autobody shops. This method was chosen because it creates a central point of administration for the software and I believe that a properly configured cluster of services will meet performance requirements. Using SQL Server 2k5 as my backend, I need to structure my DB(s) so that performance and size are kept to a minimum.
That being said, the first problem I encounter is in creating a structure that supports multiple businesses, each with their own unique dataset.
For example, each business will have work orders specific to their business. This necessitates a uniqueness constrained by businessID (hereafter titled "BizID") and WorkOrderID (WoID). The first solution I happened on was the simplest: A composite primary key composed of BizID (int) and WoID (int). The unfortunate consequence of this, as I soon realized, was that *every* table containing multiple business' data would need this composite key structure. The second problem with this method is that there is no such thing (to my knowledge) as a composite identity. I could identify WoID as the identity column, but it would not iterate WoID for BizID x properly if any other Biz added a work order to the table. (i.e. biz 1 adds three work orders (identitied 1, 2, 3), biz 2 adds one work order (would identity as 4) and Biz 1 adds another (would identity as 5), leaving us with 1, 2, 3, 4, 5 across two businesses, rather than 1, 2, 3, 4 for biz 1 and 1 for Biz 2)
The second idea I considered was one DB per business. I didn't consider that for very long, since I assumed size considerations would be blown out of the water if I had 50 business and 50 DBs. I could be wrong, as I am decidedly a novice at this. It does benefit from not putting all my eggs in one basket though and makes backup/recovery/troubleshooting much simpler.
The third idea I considered was one table per business. This suffers from the same issues as #2 above with not as many of the benefits.
Both ideas 2 and 3 would need a master table relating logins to the DBs they belong to, which would not be hard to implement at all, but the implications of using this method are unknown to me.
So quite obviously, I'm a novice at this. Perhaps I took a project on that was too big for my britches, but just getting out of college puts me in a good place to take a risk and I will learn a great deal from putting a complex (is it so?) system like this into action.
I appreciate any and all responses, thanks in advance for your replies!
-Devin
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Oct 3, 2006
I have one databaseand I create new database by copy everything from first db I then alter some column on new database and now I would like to compare two databaseHow can I do it ?
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Jun 4, 2007
I am thinking of doing a fake PC company site for my ASP project. so
what they will have is a chat, products with reviews, and users can
have "Buddies".So my DB so far (Tables):ProductPC - ID, Processor, RAM, HDD, Graphics, LCD ...ProductHardware
- ID, Title (Like "Intel C2D E6600"), Description, Price, Rating (0-5
stars, so integer), Category (CPU, HDD, Graphics)ProductSoftware - ID, Title (eg. "Adobe CS3"), Description, Price, Rating, Category (eg. Design, Programming)Reviews - ID, ProductID, Title, Content, DateChat - ID, TopicID, Title, Content, DateUsers - ID, Username, Password,The problem, how do i connect Reviews to the products since they are from diff tables.How do i get the "buddy" system workingChat i think its not as simple as thatBut i just need a simple ASP project, so no need to get too complex, but i still hope to learn as much.
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Nov 26, 2007
Hey,
I havent been working with databases for quite a while but now im in charge of creating a rather powerful website with webzine (online magazine) among other things. Within this magazine there are several different categories of articles such as concerts, album reviews, interviews, product reviews etc etc which obviously recquire rather differently structured tables. Multiple images are going to be uploaded to all articles and users are going to be able to comment on all the articles. Since the comments and image tables dont differ between the articles i would much rather store all comments for example in the same table, but wont i get relationship problems? Perhaps I could have a column referring to a certain kind of article, and then a second column with the id of that specific article? Or is the best way simply to have a seperate image and comment table for each set of articles?
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Jan 29, 2008
Hi i have a student table and also an societies table, and a student can belong to as many societies as possible, for example student John Taylor belongs to the Football society, rugby societey and dance society, where as student Jim Jenkins belongs to the Football society, rugby society, arts society and graphics society.
My tables so far look like this;
STUDENTS; student_id, student_name
SOCIETIES; society_id, society_name
My question is how can i make the scenario above reflect in my table structure, would i need to create another table, if so what fields or columns should i place in this new table, thank you.
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Mar 31, 2008
Hello all!
I'm working on an application that requires a bit of tricky database development, and I was hoping to get some advice from you.
The best way to describe the application, is to use an example, and the best I can think of is Facebooks news feed, where you can see if any of your friends have become friends with other members, or joined any groups, if your friends have completed quizs, attended any meetups, got arrested at the weekend etc etc..
My application is similar, but requires a lot less features. It will only tell show you if any of your friends have become friends with other members, or joined any groups (example: your friend Dave is friends with Jane).
Currently in my database, I have... users table (that holds a list of registered users) friends table (that links users who have decided to become friends with other users)groups table (that holds different groups)user_joined_groups table (that links users to groups they have decided to join).
Its simple and it works fine.
So to get around the newsfeed problem, I thought of doing this, creating 2 new tables. The first table will hold the news type and give it an ID...
NewsTypeTable============NewsTypeID NewsType1 NewFriend2 JoinedGroup
The next table will be FriendsNewsTable, and everytime a user joins a group, or makes a friend with another user, details are added in here...
FriendsNewsTable=============NewsID NewsTypeID FriendID newFriendID newGroupID datecreated1 1 225 156 2 2 95 52
Ok, so above in the FriendsNewsTable, the first record shows that the user has made friends with someone, and the second record shows that a user has joined a group. I though that this approach might work. but then I though... If I have 20 friends, that means I am going to have to search with each one through FriendsNewsTable, which could contain 30,000 records (wishful thinking!) So this is bound to make the page crawl to say the least.
So does anyone have any advice how I should go about this?
Thanks!
Matty
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Apr 26, 2008
What method would you suggest is the best way to deal with a website?
Say for example, writing SQL. Am I better using Stored Procedures and adding methods for accessing there or just writing the SQL inline. What do you think about this? Is it totally overkill to use stored procedures in a small website?
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May 14, 2008
I'm trying to design a site for parent conference scheduling.
Usually we have a couple of days appointment time, for example 5/8/2008, and 5/9/2008. and the time usally start at 7:00 and ends at 9:00. one appointment time lasts about 20 minutes.
I would put a page something like this, after parent or student login, 1. they are asked to choose a date, 2.after the date is chosen, show available teacher names, 3, after the teachers are selected, for each teacher, it will show a list of radio buttons for parents to select the time period open, For example:
teacher: John smith. time: 7:00; radio button 7:20 radio button 7:40 Booked............... 8:40 radio button
4, the student choose the available time, and then enter student name, then submit.
I would like to know how to setup the database table and present to the users. Currently for this scheduling part I have tables like teachertable, scheduling table, Appointment table.
Teacher table: teacherID, name, email, course,Scheduling table: appointD, TeacherID, room, appt date
I think I will prepopulate the two tabels before conference time.
and after user submit the selection, insert into Appointment table the other fields like scheduling ID, appoint time, and studentname.
The things confuse me, is how can I deal with the appointment time fields, shall I add another table for appt time? should this field be prepopulatd to the table and pull from the table for student to select or something else?
HOw can I do with this: if a teacher not available after 8, how can I excluded the time period for the teacher?
Thanks
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Sep 30, 2005
Hello,I am upgrading my (simple) cms from one menu layer to two layers. So i have two tables in de my DB- table_mainmenu- table_submenuThe submenu records are linked to the mainmenu records on the mainmenu id. So far so good. Heres my problem, i cant figure out how to change the order of the pages...!? What is the theory behind recording the stacking order of the menu items? How can i record this information in the DB?I just need the theory, i can figure out the details for myself. Thanks in advance!Corstiaanp.s. is the the right forum to post this?
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Dec 27, 2000
Hi all!
I have a friend who is a contract developer working remotely for a company on a SQL Server + VB project. He is having difficulty because someone at the company is making changes to the database tables without informing him, and of course then there are numerous application errors. This has happened far too many times for him to dismiss it. Examples of these changes are changing field names, deleting fields, changing datatypes, even changing the server name. My question is does SQL Server automatically log changes to the database, and if so, how can this log be read?
Thanks!
Lia
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Apr 13, 2000
Can anyone tell me;
Is there anyway to copy an entire database structure (layout of column definitions and character formatting)?
Or do I have to delete the relationship, then the child first?
For testing purposes, if I screw one up, I would like to be able to start with another copy.
Thanks
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Nov 1, 1999
Hi all,
I want to copy a production database schema to an archiving database, only
the structure : tables, views, defaults, rules,UDTs. For achieving that
I am trying to use SQL/DMO functions, "CopyAllTables" for example. My script works with no error but unfortunately the destination database
contains no objects. Why, have I missed something ?
Does anyone know how to do that?
Many thanks for your help
Regards,
Herve
hmeftah@aol.com
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Jul 23, 2005
Hi.We have a .NET programmer using our SQL server. The database is roughly8GB at this point, full of all of our inventory, payroll data, etc. forrunning reports.This is on a dual-xeon 3.2Ghz, 4GB DDR, 3x15k RPM SCSI RAID-5, gigabitethernet, etc server.Yet, every once in a while it slows to an absolute crawl. IIS6 is thefront-end, and its limited to a web garden with 4 threads. However,sometimes only 1 processor does any real work, even when multiplepeople are running reports.Blocking is NOT a problem, however I've seen 300,000+ locks/secrequested occasionally (not waiting or anything like that, justopened).Cache hit ratios are roughly 99%.One issue that I suspect is that the programmer is using varchar(50)for EVERY column in EVERY table (except unique keys).My question: In this configuration, would varchar(50)s be the cause ofthe awful slowdowns?I know its all cached in memory, but on these older xeons (533fsb,DDR266) the memory subsystem could be better. If we are pulling THATmuch excessive data on an already congested bus (since its dualintels), would it cause a dramatic slowdown?The reports we run are highly intensive, but usually do not take afraction of the time that they do when the server exhibits thesebehaviors.I really could use anyone's input on the matter. I've read onlineguides, 2 performance optimization books, and seemingly created optimalindexes, but none of that has led me to a real solution.ThanksMortrek
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Feb 15, 2007
Hi,is there a way of exporting database structure not the data in it?Thanks.
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Jan 25, 2008
Hi all,
Is there a way to copy a structure of one database (tables and fields) to another database WITHOUT copying the data??
Someway to do that with replication??
any help is very appreciated!
Thank you,
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Dec 29, 2007
Hi i am creating a web page which will return the results of products, the store name and the distance of the store from the postcode which the user has put into a text box. My first question is how would my database structure look, below is what it looks like at the moment;
Company; companyID, companyName, companyAddressLine1, companyAddressLine2, companyPostcode.
and
Products; productID, productName, companyID, price.
In order to achieve the proximity search how would i alter the "Company" table, as in what columns will need to be added or removed, thank you.
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Mar 19, 2008
I have written 5 content-management systems and am getting a little bored writing a lot of the same functionality and tweaking it for different datamodels. Is there a way within .NET to have visibility of a database's structure (ie, data type, column names, foreign keys etc)? I'd like to write up a dynamically generated form for any given table, displaying appropriate form controls based on data type and foreign keys.
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Nov 5, 2004
Hey,
I was wondering does anyone know a way to get the structure, with relationships, of a Sql Database and generate a XML Schema. I want to use the Schema to build a CrystalReport.
Thanks!
-Kevin
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Dec 30, 2007
Hi i am creating a web page which will return the results of products, the store name and the distance of the store from the postcode which the user has put into a text box. My first question is how would my database structure look, below is what it looks like at the moment;
Company; companyID, companyName, companyAddressLine1, companyAddressLine2, companyPostcode.
and
Products; productID, productName, companyID, price.
In order to achieve the proximity search how would i alter the "Company" table, as in what columns will need to be added or removed, thank you
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May 14, 2008
Hi.
I want to compare the database structure (tables, indexes, sp...) of a huge running database with some old backups of it, without restoring them, to detect some object's changes. Data is not required at this time.
Is there a tool to extract the database structure into a SQL file directly from the .bak file?
Thanks... ++Vitoco
PS: I wrote such a tool for Oracle 7 many years ago. I hope someone did the same for SQL Server ;-)
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Jul 23, 2005
Hi all!I have an application that needs to copy the database structure fromone database to another without using the "Generate SQL Script"function in Enterprise Manager. I'd like to do this from within astored procedure. Can someone recommend the best approach for this?I've seen references to using SQL-DMO from a stored procedure using thesp_OA* procs in other postings to this group but was wondering if therewas an easier way? Can I use bcp and then use xp_cmdshell from withinmy stored procedure? It's not clear to me from the documentationwhether bcp copies both structure and data or just data? Is there abetter way?Thanks in advance for any help!Karen
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May 22, 2008
Greetings,
Have an interesting issue in a database I'm trying to design and I'm trying to find a better way to setup the structure, if there is one. Going to generic example of my issue.
StudentList --- This table is the list of all College Students(with Primary Key of StudentID)
MajorsList --- This is a table listing all of the majors available at the College (PK of MajorID)
CourseList --- This is the list of all of the courses at the school (PK of ClassID)
This college allows students to take 1 or more majors, with the number of majors unknown.
-- Any number of students can take the same majors or different majors.
-- -- (aka 1 StudentID -> 1+ Majors & 1 Major -> 1+ StudentID's)
The majors all have different numbers of courses in them.
-- Many of the majors can have the same, or different courses in their lists.
-- -- (aka 1 Major -> 1+ Courses & 1 Course -> 1+ Majors)
I'm looking to see if their is a better way of tieing together the Students -> Majors and Majors -> Courses.
If done properlly, a single select and a few joins should bring up every class a student is taking for all their majors, or any other relationship to any of the three main tables primary keys.
Currently, to tie the three tables together, I have made two Interrum tables:
-- StudentMajors - - With only two columns
-- -- StudentID (ForeignKey tied to PrimaryKey StudentID in StudentList)
-- -- MajorID (FK tied to PrimaryKey MajorID in MajorList)
and
-- MajorCourses - - with only two columns
-- -- MajorID (FK tied to PrimaryKey MajorID in MajorList)
-- -- CourseID (FK tied to PrimaryKey CourseID in CourseList)
These tables give clear and definate ties between the tables, but my worry is that there is no primary key for these two tables, and no column in the tables is elledgeable for becoming PK, because, in this example the StudentMajors table can lis tthe studentID multiple times, each with a different MajorID. Sames goes with MajorCourses.
Is there a better structure method for reaching this same goal?
Additional, I don't know how to do a contraint that should be in place of:
-- In StudentMajors, for each value of studentID, there can be no duplicate values on MajorID
-- -- (same in MajorCourses tables in relations to classid's)
Any advice on how to do this constraint?
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Feb 19, 2007
I have been working on my windows app, using SQL Server 2005 (& C#) but I now have loads of junk data, so I want to copy the structure without any data to a new set of files that can become the production version.
I assume I can use backup and restore in future when I want a copy of my production data to use for future testing.
How would I take just one table from my test database and add it to my production database without retyping the design?
Apart from the size limitation is there any advantage in buying a version of SQL Server over using the Express edition?
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Feb 13, 2008
I'm looking to create a new version of a database but with completely reloaded data - so I want to retain the database structure but none of the data.
Is there an easy way (read: without a DBA on staff) to copy an existing database structure - preferably with views and stored procedures - and not take the data along for the ride?
Thanks in advance for suggestions...!
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