Creating Relationships With MSDE
Apr 26, 2004Is it possible to create relationships between tables using foregin keys with MSDE. I have looked for any information and can't seem to find anything.
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Relationships In MSDE - How Do I Do It?
Nov 27, 2005Hi
I am using the Web Matrix Project to write a .NET
application. I have set up a database using MSDE which I
accessed through the Web Matrix Project to start with. I have now
found the Web Data Administrator which I use to backup my database and
help to transfer it to the Server where I hope to run this application
(if I ever get it finished!).
I need to set up some relationships between database tables but cannot
see a way to do this. SQL Server Books on Line referes to
Enterprise Manager which I believe ships with the full MS SQL Server
package (and costs a package). I am doing this on a
shoe-string. Any ideas on how to do it?
Thanks in advance.
Mike
Creating Relationships--Help Needed
May 14, 2008I know the method where you select each and every table and manually create foreign key relationships to other tables in the database visually or by sql. Is there any way in SQL server 2005, to create these relationships using wizard, where it checks for the same column names in different tables and creates the relationships. If yes, please let me know how to do it in SQL server 2005.
View 3 Replies View RelatedCreating Relationships In Asp.net Enterprise Manager
Oct 30, 2007Hello
I am using a web hosting company for my web site, unfortunately after developing the site with server express the company told me they do not support this. As the database only holds three tables and only contained test data, this was not too much of a problem and I thought I would rebuild the databse on the development tool (ASP.net enterprise manager). I have managed to create the tables and populate them with the required data. My only problem is the user interface of the enterprise manager is not the friendliest and I am not too sure how to create the relationships between the tables. The interface only seems to have facilities for creating tables, views, stored procedures, users and roles.
Any tips on how I can create relationships between the tables.
Graeme
Creating Tables In SQL Server Via Query Analyzer With Relationships
Jun 7, 2005I've been searching around for some info on how to set this up, but with no luck.I need to have a .sql file that will set up a few tables and these tables will have relationships and contraints.I can do this by hand in enterprise manager, but need to set up some procedures that will do the same thing.For instance, I can create the tables just fine.....CREATE TABLE students ( sId int NOT NULL PRIMARY KEY, studentId varchar(50) NOT NULL, course varchar(50) )
CREATE TABLE courses ( cId int NOT NULL PRIMARY KEY, course varchar(50) NOT NULL, sco varchar(50) )But, I need to set up relationships in there somehow.Once student may have many courses (one to many) and one course may have many sco's (one to many) SCO would be another table.Can someone point me to a good link that would show how to complete these procedures?Thanks all,Zath
Creating Relationships Via SQL Server Mgmt Studio Designer
Apr 25, 2007I have created two tables and receive a "columns in table ... do not match an existing primary key or UNIQUE constraint." error message.
Table1: GOSMapping
PK: AuthInd (bigint)
PK: GLCode (nchar(8))
-both columns were set as PK simultaneously
Table2: GOSTracking
PK: AdjID
FK: AuthInd (bigint)
FK: GLCode (nchar(8))
I open Table2 in the designer and right click, then select Relationships. I choose both of the columns that are the PK in Table1, and set the exact fields as the FK in Table2. I get the message when trying to save this relationship. All data types are congruent, and the primary key has been set as the combination of the two PK columns in Table1. Any ideas?
Creating Inter-table Relationships Using Primary Keys/Foreign Keys Problem
Apr 11, 2006Hello again,
I'm going through my tables and rewriting them so that I can create relationship-based constraints and create foreign keys among my tables. I didn't have a problem with a few of the tables but I seem to have come across a slightly confusing hiccup.
Here's the query for my Classes table:
Code:
CREATE TABLE Classes
(
class_id
INT
IDENTITY
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
class_title
VARCHAR(50)
NOT NULL,
class_grade
SMALLINT
NOT NULL
DEFAULT 6,
class_tardies
SMALLINT
NOT NULL
DEFAULT 0,
class_absences
SMALLINT
NOT NULL
DEFAULT 0,
CONSTRAINT Teacher_instructs_ClassFKIndex1 FOREIGN KEY (teacher_id)
REFERENCES Users (user_id)
)
This statement runs without problems and I Create the relationship with my Users table just fine, having renamed it to teacher_id. I have a 1:n relationship between users and tables AND an n:m relationship because a user can be a student or a teacher, the difference is one field, user_type, which denotes what type of user a person is. In any case, the relationship that's 1:n from users to classes is that of the teacher instructing the class. The problem exists when I run my query for the intermediary table between the class and the gradebook:
Code:
CREATE TABLE Classes_have_Grades
(
class_id
INT
PRIMARY KEY
NOT NULL,
teacher_id
INT
NOT NULL,
grade_id
INT
NOT NULL,
CONSTRAINT Grades_for_ClassesFKIndex1 FOREIGN KEY (grade_id)
REFERENCES Grades (grade_id),
CONSTRAINT Classes_have_gradesFKIndex2 FOREIGN KEY (class_id, teacher_id)
REFERENCES Classes (class_id, teacher_id)
)
Query Analyzer spits out: Quote: Originally Posted by Query Analyzer There are no primary or candidate keys in the referenced table 'Classes' that match the referencing column list in the foreign key 'Classes_have_gradesFKIndex2'. Now, I know in SQL Server 2000 you can only have one primary key. Does that mean I can have a multi-columned Primary key (which is in fact what I would like) or does that mean that just one field can be a primary key and that a table can have only the one primary key?
In addition, what is a "candidate" key? Will making the other fields "Candidate" keys solve my problem?
Thank you for your assistance.
Creating New Users With MSDE
Jul 20, 2005I have MSDE installed on my sistem, and I need to add a new user.How do I go about doing this?
View 2 Replies View RelatedCreating Custom Tables During MSDE Setup!
Nov 13, 2004Hi folks, i need ur guidance.
I have a few DDL and DML scripts which i want to be automatically applied during MSDE setup; or an .MDF file be attached automatically. Please suggest an easier way!
Howdy!
MSDE Text Datatype - Unable To Store More Than 900 Characters. (msde + Visual Studio 2003)
Jun 6, 2005Hello,
I'm not sure if it's the setup I did wrong, but I can't seem to get my
text datatype in my database to store more than 900 characters.
I'm trying to setup a news database for my website, which will populate
the information into a datagrid. To test, I manually added a news
item in the database through the visual studio 2003 gui. I
immediately noticed a problem as the I was getting an error after a
long news item saying:
"The value you entered is not consistent with the data type or length of the column, or over grid buffer limit."
I couldn't find anthing to set the buffer limit and the datatype is
"text" filled with simple text in the column. As a further test,
I
simply entered 12334567890123... up to 900 characters and still
recevied the error.
I would appreciate someone leading me in the right direction on this one.
Thanks a lot.
How Do I Change The Name Of A Computer Running MSDE With Out Reinstalling MSDE
May 27, 2000I am trying to change the computer name of a machine running MSDE but I get an error when SQL Server starts. With regular SQL when I change the name of a computer I re-run setup and setup fixes this problem. MSDE can only be installed from unattended mode so I can’t rerun setup and fix the problem.
My question is "How do I change the name of a computer running MSDE with out reinstalling MSDE"
MSDE: Renaming Machine Without Reinstall Of MSDE
Mar 27, 2001We currently have the problem, that all our machines are produced with the
same name and afterwards the name is changed. So we have the problem that
the checksum key for the MSDE isn't valid anymore. As MSDE can only be installed
from unattended mode so I can’t rerun setup and fix the problem. Does anyone
know a solution for this problem ?? A program recalculating the cheksum ??
regards,
Manfred
MSDE Worth Using Or Should I Invest In MySQL? (was MSDE)
Mar 9, 2005I'm not sure if this is the correct forum for this this question but I'll give it a shot.
The only db development that I have ever done is in MS Access. I have a project at work that is being accomplished in VB and I need a db engine to use as the back end. Visual studio came with a copy of MSDE. Is this tool worth using or should I invest in mySQL? Are there any advantages to using MSDE over mySQL?
One To One Relationships
May 29, 2007Ok, so I open up a book on beginning sql and it discusses relationships.There is something that appears wrong. I am not understanding how the book is describing the one to one relationship. In it's figure, it shows that the same agency can have two different artist id's. But according to it's definition of one to one list can be related from both tables.Can someone explain this further please?Thanks in advance.
View 3 Replies View RelatedADO.NET - Many-To-Many Relationships
Aug 8, 2007How do you show many to many relationships in ASP.NET with datasources?
I can retrieve the information from the database easily but I can't manage to save that information into a variable so that i can then call for only information in the M2M table related to the ID Key I want. For example..1 <asp:Label ID="lblTestLabel" Text='<%# DataBinder.Eval(Container.DataItem, "title_id") %>' Runat="server" />
2
3 <script language="VB" runat="server">
4 sub Page_Load(sender as Object, e as EventArgs)
5 Dim lblTitleID As Label = Repeater1.FindControl("lblTestLabel")
6 Response.Write(lblTitleID.text)
7 End Sub
8 </script>
When I try to run this script it dosn't work and I get the error:
System.NullReferenceException: Object reference not set to an instance of an object.
For line 6 of the code above. Is there a way to just retrieve information from a datasource without storing information into a label first?
PS: I use sqldatasource tags to retrieve information like:1 <asp:SqlDataSource ID="DataSet1" runat="server"
2 ConnectionString="Driver={MySQL ODBC 3.51 Driver};server=localhost;database=;user=;pwd=;option=3;"
3 ProviderName="System.Data.Odbc"
4 SelectCommand="Select * from titles order by title_id">
5 </asp:SqlDataSource>
Many To Many && Other Relationships
Aug 10, 2007Can someone help me sort something out. Suppose we have two tables in a database.One is named Person, and one is named Birthday. Is this a many to many relationshipor a 1 to many relationship?
Person has many birthdays. Example. Joe Schmoe has a birthday for every year of his life. birthday(7/11/1976) has many People (Many people have a birthday on 7/11/1976.
Relationships...
Feb 2, 2004Is there any easy way of getting all the relationships for the tables in aSQL server db? I've looked through Google and the Books online but I'm barely scratching the surface on the systables. I know I can go to each individual table and get the dependencies or even print out the diagram through Enterprise Manager but I really don't want to have to type out all the primary/foreign keys for 100+ tables. Any help on getting this data either through a 3rd party software or querying the systables would be great.
THT
DMW
One-to-one Relationships
Mar 21, 2001We have a table with approximately 150 colums and 2/3 of them are bit datatypes. We do not expect much activity on this table. Does it make sense to separate it into a few tables instead of 1 with one-to-one relationships? Will the join(s) significantly slow down our web application? Thank you
View 2 Replies View RelatedAre Relationships Necessary
Aug 6, 2004My hosting servers have "myLittleAdmin" installed. I am new to ms sql I have some experience with Access but I have never set up Relationships inside the database server. I have always just relied on my application logic to call the relations. What is the benefit to setting up relationships in sql, if any?
View 4 Replies View RelatedOne To Many Relationships
Nov 11, 2004Is there a tool in Enterprise manager to list out the one to many & many relationships with a database?????:?:
View 4 Replies View RelatedRelationships
Feb 1, 2007Hey, I have SQL Sever Enterpise Manager. I am new at this company and I need to know the relationships between ALL the tables. Is there anywhere I can go to view all the primary keys and the relationships?
View 3 Replies View RelatedKey Relationships
Jun 1, 2007I am viewing tables in the ‘object explorer’- I can see the tables. If I open it up I can see columns, keys, constraints etc…
So I can see they key… can I tell which table/field the foreign key is connected to?
thanks
Many To Many Relationships
Oct 17, 2007Hello,
I have 3 tables. Posts, PostsTags and Tags.
This is a many to many relationship.
So PostsTags has the following columns:
PostId (PK) and TagId (PK)
I always did that way in SQL 2005.
In some examples I see PostsTags have 3 columns:
PostTagId(PK), PostId (FK), TagId (FK)
Should I use it this way, instead?
Thanks,
Miguel
Relationships
Jul 13, 2006Is it possible to have 2 different databases and create relationships inbetween the two? I am thinking about way down the road and the size of the databases and I believe that I need to split my data into multiple databases to keep from running into the size limitations.
Davids Learning
One To One Relationships
May 29, 2007Ok, so I open up a book on beginning sql and it discusses relationships.
There is something that appears wrong. I am not understanding how the book is describing the one to one relationship. In it's figure, it shows that the same agency can have two different artist id's. But according to it's definition of one to one list can be related from both tables.
http://foo.gearsector.com/foo/instr_scrns/oneToMany.gif
Can someone explain this further please?
Thanks in advance.
RelationShips In SQL
Apr 1, 2008
How can I use with relationShips in SQl?
Tamir BLoch .
Relationships Vs. No Relationships
Apr 3, 2007Hello!
I have a really small database in terms of number of objects, but very big in terms of data (possibly millions of records). I always try to design my databases to be in the 3rd normal form (at least I hope they are!), but sometimes (for databases consisting of just a few tables) maintaining M:N relationships looks like an over-bloated approach to me... Let's see an actual example. I have a table like this:
Code SnippetCreate table [Airfares]
(
[OriginCity] Char(3) NOT NULL,
[DestCity] Char(3) NOT NULL,
[FareDate] Datetime Default getdate() NOT NULL,
[Price] Decimal(9,2) Default 0 NOT NULL,
[PriceChange] Decimal(9,2) Default 0 NOT NULL,
[Wrong] Bit Default 0 NOT NULL,
Primary Key ([OriginCity],[DestCity],[FareDate])
)
go
Now, at first there also was an Airline nvarchar(50) field, which stored the airline name. But now the client requested to store fares for a few airlines if it's the same price and city pair. This way we can have 3 airlines offering the same price on the same itinerary for example. So I added a dictionary table called Airlines:
Code SnippetCreate table [Airlines]
(
[AirlineCode] Char(2) NOT NULL,
[Name] Nvarchar(50) NOT NULL,
Primary Key ([AirlineCode])
)
go
Now, there are two things I can do. We are obviously dealing with the M:N relationship type here. I can either add another nvarchar column in the first table, like Airlines nvarchar(255) and store something like 'AA,AB,AC' there - those would be airline codes. OR I could do it the proper way and create a cross-reference table which will connect both Airfares and Airlines tables (this will store as many records as there are airlines for that particular itinerary, offerring the same price):
Code SnippetCreate table [AirfareAirlines]
(
[AirlineCode] Char(2) NOT NULL,
[OriginCity] Char(3) NOT NULL,
[DestCity] Char(3) NOT NULL,
[FareDate] Datetime Default getdate() NOT NULL,
Primary Key ([AirlineCode],[OriginCity],[DestCity],[FareDate])
)
go
But this is starting to look overly complicated, isn't it? The pros of this are I'm going to get real relationships, referential integrity, etc., but cons are more difficult code to query all this. What would you do? Do we really need referential integrity everywhere? Are there times when we're better not using relationships? I have seen many programmers skip referential integrity before, which always made me think they are missing something important in a Relational Database Management System.
Relationships In SQL 2005?
Feb 13, 2008Hi
How I can get to see the relationships, like in access, in sql 2005?
Thank,
K
An Easy One: The Need For Relationships?
Mar 16, 2008Ok - I am still a bit weak on SQL. My understanding of FK relationships in a database are to reinforce the data integrity - Correct? For example, does it make sure that the id given for SiteID does indeed exists. Can it link tables like JOIN in select statements? If not, is there any gains by creating them, such as performance?
View 1 Replies View RelatedI've Never Been Good With Relationships
Feb 15, 2004I'm having some trouble working out how to query some data. Rather than explain up front, here's some examples of what I want to achieve:
*******************************************************
I've got a structure which looks vaguely like this:
[ANCESTORS]
Grandparent
Parent
Child
If limit by grandparents, then I only get the lineage for that particular grandparent. I.e.:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Grandparent.Name = 'Cybill'
This would return all of the children of 'Cybill' and their children. Now, if I use the following query:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Child.Name = 'Jean'
This would return Jean's parents + the parents of Jean's parents (Jean's grandparents).
Likewise, if I enter:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Parent.Name = 'Ron'
Then I would get Ron's parents and also his children.
*******************************************************
So, as you can see, at first it appears that I'm after a LEFT JOIN - meaning that the grandparents don't need to have child records to be returned, but, then it turns out that I need INNER JOINS - to limit grandparents when I choose children.
Can anybody see my dilemma here?
Mark-up ASP.net posts here
MarkItUp.com
Same Old Question About Relationships
Sep 11, 2003I wanted to know that whether using relatioships betwenn tables improves performace for select queries?
what is the significance of using joins in queries after implementing relationships?
thanks
Database Relationships
Aug 22, 2006While playing about with SQL Server 2005 I am sure that I saw a tool to do relationships the same was as in access - however now I can't find it.
Am I seeeing things or does this really exist?
Finding Relationships
Sep 23, 2005Hi, sorry if this comes across as a stupid question, but i'm new to SQL. I have had a look on Google and on these forums but not found the answer..
I am running MS SQL 7 with a database containing around 130 tables.. i want to know if there is a query/command that i can type that will look through all the tables and tell me which ones reference a specified table (through it's key). Hope this makes sense! i've looked at some of the stored procedures but not found any that give me anything useful.
EDIT: Just so you are aware, i did not create this database, hence why i am not aware of the relationships myself, i have only just started working on it.
Thanks
Steve