I usually crate relation with database but not use physical relation
* My question is if crate physical relation is best way or not
and what advantage and disadvantage of physical relation
and if it the best way to make relation
thanks in advance
I'm getting this warning each time I auto-generate my model. I'm using named queries with logical primary keys.
The relation property of the role "xxx" refers to the target end of relation "xxx" which is not bound to a set of uniquely contrained columns.
I've searched and can't figured out what I am being warned about and whether I need to fix something. Can you help?
Thanks,
Toni
--Example Schema posted at end of message:---For reporting purposes, I need to build a single comma delimited string ofvalues from the "many" tableof a database.The easiest way to see what I want is to look at the sample after mysignature.By the way, this is actually a busines problem, not homework! I justcreated a simpleexample using class and persons because everyone is familiar with thatrelationship.I have two tables on the 'one' side of the relationship: PERSON and CLASSThe ENROLLMENT table resolves the many to many relationship between PERSONand CLASS.(I know that a real system would be date effective, etc, but this is just asimple example.that will show my problem). ENROLLMENT has one row for each Class in which aPerson is enrolled.Look at the sample report: I have to "flatten" the join result and listthe class titles in acomma delimited string. I am stuck with this reporting requirement, and Iam NOT going to denormalizethe tables.One way to accomplish the result is to use a cursor to step through the rowsand build a "Classes"string with concatenation. I don't much like this option. I am not writingthe front end code,but I want to make it easy for the developer. Ideally, I would like to givehim a flattened viewso he can just do a simple join and run his report.I believe that what I want cannot be accomplished with ANSI SQL. However,does MS SQL have someextensions that could help me do the job? Failing that, how could I write astored procedure that wouldreturn the personID and the "Classes" string in a format that would bejoinable to the other tables?Thanks,Bill MacLeanP.S. Some people like to see actual database scripts as samples instead ofa textual representation.I have pasted in a script that creates sample tables and populates them.--Sample Tables and Reports:TABLE PERSONPersonID LastNM FirstNM--------- ----------- ---------1 Smith John2 Jones Sara3 Smith LucilleTABLE CLASSClassID ClassNM----------- ------------------10 SQL Server 10120 C++25 Object Oriented Design40 Inorganic Chemistry50 Organic Chemistry80 Early Lit.TABLE ENROLLMENTPersonID ClassID-------- ---------1 102 101 401 803 203 25SAMPLE REPORTPerson ID Name Classes--------- ----------------------- -----------------------------------------------------------------1 Smith, John SQL Server 101, Inorganic Chemistry,Early Lit.2 Jones, Sara SQL Server 1013 Smith, Lucille C++, Object Oriented Design/************************************************** ********SQL Server Script/************************************************** ********/CREATE TABLE [dbo].[CLASS] ([ClassID] [int] NOT NULL ,[ClassNM] [varchar] (25) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL) ON [PRIMARY]GOCREATE TABLE [dbo].[ENROLLMENT] ([PersonID] [int] NOT NULL ,[ClassID] [int] NOT NULL) ON [PRIMARY]GOCREATE TABLE [dbo].[PERSON] ([PersonID] [int] NOT NULL ,[LastNM] [varchar] (25) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,[FirstNM] [varchar] (15) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL) ON [PRIMARY]GOALTER TABLE [dbo].[CLASS] WITH NOCHECK ADDCONSTRAINT [PK_CLASS] PRIMARY KEY CLUSTERED([ClassID]) ON [PRIMARY]GOALTER TABLE [dbo].[ENROLLMENT] WITH NOCHECK ADDCONSTRAINT [PK_ENROLLMENT] PRIMARY KEY CLUSTERED([PersonID],[ClassID]) ON [PRIMARY]GOALTER TABLE [dbo].[PERSON] WITH NOCHECK ADDCONSTRAINT [PK_PERSON] PRIMARY KEY CLUSTERED([PersonID]) ON [PRIMARY]GOALTER TABLE [dbo].[ENROLLMENT] ADDCONSTRAINT [FK_ENROLLMENT_CLASS] FOREIGN KEY([ClassID]) REFERENCES [dbo].[CLASS] ([ClassID]),CONSTRAINT [FK_ENROLLMENT_PERSON] FOREIGN KEY([PersonID]) REFERENCES [dbo].[PERSON] ([PersonID])GO-- Insert rwo for each CLASSINSERT INTO CLASS VALUES (10,'SQL Server 101');INSERT INTO CLASS VALUES (20,'C++');INSERT INTO CLASS VALUES (25,'Object Oriented Design');INSERT INTO CLASS VALUES (40,'Inorganic Chemistry');INSERT INTO CLASS VALUES (50,'Organic Chemistry');INSERT INTO CLASS VALUES (80,'Early Lit.');-- Insert row for each PERSONINSERT INTO PERSON VALUES (1, 'Smitn','John');INSERT INTO PERSON VALUES (2, 'Jones','Sara');INSERT INTO PERSON VALUES (3, 'Smith','Lucille');--Insert row for each ENROLLMENTINSERT INTO ENROLLMENT VALUES (1,10);INSERT INTO ENROLLMENT VALUES (1,40);INSERT INTO ENROLLMENT VALUES (1,80);INSERT INTO ENROLLMENT VALUES (2,10);INSERT INTO ENROLLMENT VALUES (3,20);INSERT INTO ENROLLMENT VALUES (3,25);
View 3 Replies View RelatedI had to to relocate the database log file and I issued an Alter database command but by mistake I put a space in the file name as below. The space is at the beginning file name. Now I am unable get the database loaded to SQL Server. The database has 2 replications configured, so deleting and re-attaching the database means the replication needs to be re-configured. Is there an alternative way to issue a command to update the database FILENAME ? Not sure if this can be edited in master database (sys files).
ALTER DATABASE [User_DB]
MODIFY FILE (NAME = User_DB_log, FILENAME = 'I:SQLLogs User_DB_log.ldf')
GO
hi we are in the process of developing a project and we r at the initial phase i.e. at the analysis phase and we have been discusssing on what is physical and logical database design. can any body send any links or articals on this will be hightly appreciated.
View 1 Replies View RelatedI want to move 2 databases to another physical disk. They are both single file databases. It looks like a fairly straigtforward attach and detach procedure, but I have a couple of questions:
The log files (.ldf) currently reside on a separate physical disk from the data files, if I attach and reattach the data files will the logs remain where they are by default or do I have to re specify there location?
Is there any advantage to running the update statistics portion of the sp_detach_db?
I have been trying to use DMO(C++) to backup a database and then restore from that backup to a new db name AND physical data and log files, with no success. I have been able to successfully restore the backup to the same database and change the physical file names using the RelocateFiles property on the Restore object, but not change both.
Any help would be greatly appreciated.
I have detached the database via sp_detach_db in a job, (I was trying to use a job to detach the database, then make copies of the mdf file, then attach the databases as different copies, somehow the job failed due to file locked) I tried to delete the physical files, but they were still locked. I tried several times, two of them I was able to delete the mdf files, but not the ldf file. The other one both mdf file and ldf file can not be deleted. I was not able to see the database via Management studio.
Can anyone help?
Thanks
Hi,We have a situation where we want to move our current databaseserver to a different hardware and rename the server.If we change the Physical server name, do we have to go thru the wholeprocess of changing it in sql server by running sp_dropserver,sp_addserver?Can we have an alias for the server name in DNS and can sql serverresolve the server name internally by going thru DNS?For eg: Our current database server name is FFSQL-PRD01. We have itregistered in EM as FFSQL-PRD01. Now we renamed the server toSTLSQL-PRD01, and added an entry in DNS for STLSQL-PRD01 with alias ofFFSQL-PRD01( the same old name as alias). After doing this when I goto EM and click on FFSQL-PRD01 would it give me an error? or can itresolve the server name by going to DNS.When you install SQl server the default instance has to be the physicalserver name, Why? Is the physical server name stored in Masterdatabase( SYSSERVERS table)?Thanks for your help.Geetha
View 2 Replies View RelatedIs there a method in SQL Server 2k to re-locate the physical databasefiles at the time the server reboots. Currently, the only way I know todo this is by scripting some OS-level commands.Thanks in advance for your help.Amy BoydDatabase AdministratorNetwork Associates*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
View 1 Replies View RelatedI have a folder with 1000 text(.txt) files in it.
I want to insert the filenames into a table in sql server.
Is it possible in SQL Server 2008..?
Hi,
i want to do the physical modeling using MS Visio. Whether is it availble with Microsoft Visual Studio 2005 or not?? If Yes, Could you please asssit what necessary loaded with Studio and Version Details.
Amirineni
Hi All,
Is it possbile to define connection string for web and database server which is running on different machine. Note( Not same LAN).
E.g (My Web Server is in London and Database server in Sydney).
Please can any one help me.??
Thanks in advance...
Dj
Hello!
What is the best way to make a copy of an existing sql server database to another (physical) server?
Plan to make a full backup of another sql server database to another server. I've read about detach and attach
and copying the datafiles and log files but some say it is prone to data loss? Is this true?
And another thing, what if the existing sql server can't affor downtime for me to copy db files etc.?
Anybody here who have done the same?
Any help is very much appreciated.
Thanks!
Hi,guys!I have a table below:CREATE TABLE rsccategory(categoryid NUMERIC(2) IDENTITY(1,1),categoryname VARCHAR(20) NOT NULL,PRIMARY KEY(categoryid))Then I do:INSERT rsccategory(categoryname) VALUES('url')INSERT rsccategory(categoryname) VALUES('document')INSERT rsccategory(categoryname) VALUES('book')INSERT rsccategory(categoryname) VALUES('software')INSERT rsccategory(categoryname) VALUES('casus')INSERT rsccategory(categoryname) VALUES('project')INSERT rsccategory(categoryname) VALUES('disert')Then SELECT * FROM rsccategory in ,I can get a recordeset with the'categoryid' in order(1,2,3,4,5,6,7)But If I change the table definition this way:categoryname VARCHAR(20) NOT NULL UNIQUE,The select result is in this order (3,5,7,2,6,4,1),and 'categoryname 'in alphabetic.Q:why the recordset's order is not the same as the first time since'categoryid' is clustered indexed.If I change the table definition again:categoryname VARCHAR(20) NOT NULL UNIQUE CLUSTEREDthe result is the same as the first time.Q:'categoryname' is clustered indexed this time,why isn't in alphabeticorder?I am a newbie in ms-sqlserver,or actually in database,and I do havesought for the answer for some time,but more confused,Thanks for yourkind help in advance!
View 2 Replies View RelatedHi friendsI have one Table called tblCategory.I have three Column CatID, CatName, ParentIDI have many records in this TableCatID CatName ParentID1 Cat1 0 2 Cat2 13 Cat3 14 Cat4 25 Cat5 26 Cat6 07 Cat7 68 Cat8 69 Cat9 710 Cat10 711 Cat11 8 Here I have Main Category which has ParentID 0 [ Cat1 and Cat6 ]I Have Sub categories of Cat1 Which has ParentID 1(CatID 1 of Cat1) [ Cat2 and Cat 3 ]Cat 2 has also sub category with ParentID 2 (CatID 2 of Cat2) [ Cat4 and Cat5]I want result looks like asCat1 Cat6 ->>>>>ParentID 0- Cat2 -Cat7 ->>>>>ParentID 1(CatID of Root Cat1) and ParentID 6(CatID of Root Cat6)- - Cat4 - -Cat9 ->>>>>PaerntID 2(CatID of Root Cat2) and ParentID 7(CatID of Root Cat7)- - Cat5 - -Cat10 ->>>>>PaerntID 2(CatID of Root Cat2) and ParentID 7(CatID of Root Cat7) - Cat3 -Cat8 -->>>>>ParentID 1(CatID of Root Cat1) and ParentID 6(CatID of Root Cat6)--No record --Cat11 Can anybody give me solution?Thanks
View 4 Replies View RelatedIf i add a new table to my database with a stored procedure, using that same sp or another can i also add a 1-M relationship with another table that is currently in the database. Please if you can provide an example.
Thank you,
This one shouldn't be too hard to do, just can't seem to figure it out.
I have two tables
tNames which contains 'ID' and 'Name'
tLocations which contains 'ID' and 'Location'
each ID may be associated with many Locations
I want to run a query to display these results:
[ID, Name, Location]
but only to return the first Location associated with that ID (or the max, min, I don't really care as long as it's only one result)
right now I have
Code:
SELECT tNames.ID, tNames.Name, tLocation.Location
FROM tNames INNER JOIN tLocations
ON tNames.ID = tLocations.ID
but this returns a new row for each different Location of the same ID
Thanks.
hi all
i want to insert null values into a column which is a foreign key
It has relation form other table.Is it possible to insert null to such a field .if so please tell the synatax to insert(i mean the process)
Thanks In Advance
Malathi Rao
Hi everyone...got a question.
How could i remove a relation from 2 tables using a script?
Thanks
RON
________________________________________________________________________________________________
"I won't last a day without SQL"
Hello,I'm relative new to sql and databases and the last few weeks I learnedmyself a lot. I'm trying to make a hotel reservation application.I have a database with a table Booking, a table Room, a tableRoomsPerBooking. So a booking contains date/time etc and a fieldRoomsPerBookingID. The table RoomsPerBooking contains number ofpersons, unitprice etc. and a field ID and a field RoomID. The tableRoom contains data like name, notes etc.now i have two questions:First about relations:The table Booking has relationship: PK table RoomsPerBooking - ID <-->FK table Booking - RoomsPerBookingID.The table RoomsPerBookingID has relationship: PK table Room - ID <-->FK table RoomsPerBooking - RoomIDIs this relationset good for my purpose? I think it is, but I am notsure.The second question is:How do I get available rooms per nightI came this far.... what are the "some statements"?CREATE PROCEDURE dbo.GetAvailableRooms(@BeginDate DATETIME,@EndDate DATETIME)ASSELECT Room.*FROM RoomWHERE Room.ID NOT IN (SELECT DISTINCT room.IDFROM Room room JOIN RoomsPerBooking roomsPerBookingON room.ID = roomsPerBooking.RoomID--Some statements--WHERE booking.FromDate <= @EndDateAND booking.ToDate >= @BeginDate)GO
View 1 Replies View RelatedI have defined a relation between 2 tables in "database diagrams" (IDE)but when a fill my tables vith a sqldataadapter i obtaina tables without relations why??how i can reslve this problem?my code is:Dim da As New SqlDataAdapter("SELECT * FROM table1", cn)Dim ds As New DataSetda.FillSchema(ds, SchemaType.Source, "table1")da.Fill(ds, "table1")--> ds.tables(0).relations.count =0 !!!!!!!!????????!!!
View 5 Replies View RelatedHI!I have a ASPNETDB as my login databas. but now i want to connect this databas or the aspnet_user table to my table, how do i?I want to check the username in aspnet_user table and select the same username in my table?I want to write all sql code in a sql file. so i want to know how i can connect to the sql file from my c# code?I hope somebody understand me...
View 2 Replies View Related When we have Table1 and Table2, then we
link both tables using a third table Table3 that relates n records in
Table1 to n records in table2, how do we call Table3? There is a name
in dataBase modeling for that, right?
hi, If I want to make one to many relationship, I put the pk of the parent as a fk in the child . like this
customer table (cust_id, fname,lname)
customer_order table(order_id,cust_id,qty,price)
I do understant this, but what about look up table, can I consider cust_id inthe customer_order table as a lookup field to the customer table?
Thanks
Al
Hi
I have about six different entities that can have zero or more note entities associated with them. The easy way to do this is obviously to have a different "note" table for each of the entities i.e. WorkItemNote, CustomerNote etc.. But I would much rather have a single "note" table since they would all be identical, so I came up with this design:
CREATE TABLE WorkItem
(
WorkItemGuid uniqueidentifier PRIMARY KEY DEFAULT (newid()),
-- rest of table declaration removed for bravity
)
CREATE TABLE Customer
(
CustomerGuid uniqueidentifier PRIMARY KEY DEFAULT (newid()),
-- rest of table declaration removed for bravity
)
CREATE TABLE Note
(
NoteId int IDENTITY(1,1) NOT NULL PRIMARY KEY,
ReferenceGuid uniqueidentifier NOT NULL,
Text ntext NOT NULL,
-- rest of table declaration removed for bravity
)
This way I can get notes associated with a given entity, either Customer or WorkItem, by just selecting from the Note table with its WorkItemGuid or CustomerGuid.
My question is: Is this the best approach to what I am trying to accomplish?
(ps: Apologies if "many to one" is not the right terminology)
Regards, Egil.
Hi,
This is my table setup
http://www.mshelp.be/img/logs.JPG
I want to retrieve the logs by profileId.
This is the stored procedure which I'm using. Don't get any syntax error, only not the correct output.
create procedure sp_Select_log_By_ProfileId
@ProfileId int
as
select
l.LogId, l.LogDescription, l.CreatedOn, l.LogAuthorId
from
Logs l inner join ProfileLogs pl
on
pl.LogId = l.LogId
where
pl.ProfileId = @ProfileId;
Can anyone help me ?
hi, I got confused for a moment about creating data structure for UMLcomposition (strong aggregation) relation one-to-many.I used Rose/DataModeler to do so.[Parent] <filled_diamond>-------- [Child]I got P/FK (primary key of my component is foreign key of it's container) inmy child table:Parent: PK Parent_IDChild: P/FK Parent_IDthat way I found out I got relation 1:1, I'm still not sure how to createdata structure realizing compositiona one-to-many.
View 4 Replies View RelatedHi All,
I have a little problem and i hope u will help me.
Well, my problem is, i want to make a relation between 2 tables which r not in the same databse.
Database D1 >>> Table T1
Database D2 >>> Table T2
So i want something like this:
Table T1:
ID >>> PK
Table T2:
ID >>> PK
Table1ID >>> FK from Table T1
so, i will have a relation between the 2 tables.
Thanks in Advance,
I have two tables: TableX & TableY
there is two similar fields (Size) with the same datatype, I want to make a relation in a way if I change the value in (TableX.Size) the same value will be applied to (TableY.Size).
How to?
Hi,
I am new to sql and is working with sql server managment 2005 +c# 2005.
My application needs to create a blockdiagram sort of thing say
if in my database i got a table 'Addition' with 'a', 'b', 'c',and the primary key addition_id, and c is related to a and b as c = a+ b.
there is stored procedure name usp_addition which contains this relation. Each time any insert or update is done this sp is executed and all the values are updated for accordingly.
My problem starts in the front end where i need to draw the graphical representation of table addition.
In this graphical representation, I need to draw the labels a, b, c and the arrows from a and b which will connect to c, showing that c has a, b as inputs.
I got the label using dataset and datacolumns but hte problem is how to create the arrows the name of labels (i.e my column names from which the arrow should start and end)
How does I get the information that c as two inputs a, b. I dont need the values since i just want to view the columns in table and which column is input to another column.
Since I need to do this dynamically because my tablename, and the number and name of column would differ does any body knows how to do this.
Priyadarshini
I want a PK-FK relation between my tables:
Products (PK = ProductID)Orders = (FK = ProductID)
How can I do this in SQL 2005?
Hi Listers,
Can any one clarify me on the following doubt.
I have 2 w2k servers with different domains and On which SQL2k is running on both the Servers. Both the servers don't have any Trust Relations between them.
My questions is, Is it possible to create Linked Servers between sql servers but their Operating Systems doesn't have Trust Relationships?.
Any help would be appreciated.
tks in advance,
Sam