Is There Such A Thing As Too Many Relationship?
Jul 20, 2005
Hi,
I have a corporate database with about 60 different tables that spans
manufacturing, accounting, marketing, etc.
It is possible, but unwieldy, to establish a relationship for each
table in the entire database through critical fields like customer_id
or product_id.
But should I do that?
My question is: Is there such a thing as too many relationships? Can
I establish referential integrity via relationships with critical
tables like Accounting, but leave the rest unconnected and simply use
JOINS in my business code?
Thanks,
HC
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Mar 25, 2006
How can I create a one-to-one relationship in a SQL Server Management Studio Express Relationship diagram?
For example:
I have 2 tables, tbl1 and tbl2.
tbl1 has the following columns:
id {uniqueidentifier} as PK
name {nvarchar(50)}
tbl2 has the following columns:
id {uniqueidentifier} as PK
name {nvarchar(50)}
tbl1_id {uniqueidentifier} as FK linked to tbl1.id
If I drag and drop the tbl1.id column to tbl2 I end up with a one-to-many relationship. How do I create a one-to-one relationship instead?
mradlmaier
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Oct 14, 2015
I have four tables with relationships as shown. They have a circular relationship and so one of the relationships is forced to be inactive.
Operation (Commodity, OperationKey) ==========>
Commodity (Commodity)
/
/
|
|
Advice (OperationKey) ====== (inactive)=======>
Operation Commmodity (Commodity, OperationKey)
I have the following measure:
Advice No. Commodity:=CALCULATE (
COUNTROWS ( 'Advice' ),
USERELATIONSHIP(Advice[OperationKey],'Operation Commodity'[OperationKey]),
operation
)
However, the userelationship function does not override the active relationship between Operation & Advice and so the measure is limited to Advices directly filtered by the Operation table.
If I delete the relationship between Operation and Advice, then the measure works as expected i.e. Operation indirectly filters Operation Commodity which filters Advice.
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Dec 6, 2007
As a burgeoning SQL developer I have never really understood the need for SQL Server / Enterprise Manager to show us the whole dbo.Table name thing. What is dbo, and why do we need to know deal with it?With that said, in my SQL 2005 Express database all of my project tables for my project management demo were named guard.pgUsers for example and not dbo.pgUsers.How come? Why did they get named different on their own?
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Mar 25, 2003
After being put in a position where I had to deal with a SQL problem without very little SQL knowledge I have screwed a clients main database up.
I backed up the transaction log and then deleted the log. The database is shown as suspect and won't let me restore.
Am I F&%ked?
Any help in sorting this out will be rewarded with much kudos and thanks
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Mar 31, 2008
I try to do:
DECLARE
@ThisMinute DateTime,
@ThisDay DateTime
SET@ThisMinute = DATEADD(MINUTE, DATEDIFF(MINUTE, '20000101', CURRENT_TIMESTAMP), '20000101')
SET@ThisDay = DATEADD(DAY, DATEDIFF(DAY, '20000101', CURRENT_TIMESTAMP), '20000101')
SELECT
row_number() over (order by MAX(HeadlineDate)) as Number,
COUNT(ArticleID) AS [Count],
MIN(DATEADD(dd, - (DAY(HeadlineDate) - 1), HeadlineDate)) AS HeadlineDate
FROM
dbo.ZMArticle
WHERE
PortalID=0
GROUP BY
MONTH(HeadlineDate), Year(HeadlineDate)
ORDER BY
MAX(HeadlineDate) desC
Which works fine, but when I do:
DECLARE
@ThisMinute DateTime,
@ThisDay DateTime
SET@ThisMinute = DATEADD(MINUTE, DATEDIFF(MINUTE, '20000101', CURRENT_TIMESTAMP), '20000101')
SET@ThisDay = DATEADD(DAY, DATEDIFF(DAY, '20000101', CURRENT_TIMESTAMP), '20000101')
SELECT
row_number() over (order by MAX(HeadlineDate)) as Number,
COUNT(ArticleID) AS [Count],
MIN(DATEADD(dd, - (DAY(HeadlineDate) - 1), HeadlineDate)) AS HeadlineDate
FROM
dbo.ZMArticle
WHERE
PortalID=0
AND
Expiredate <> Null
GROUP BY
MONTH(HeadlineDate), Year(HeadlineDate)
ORDER BY
MAX(HeadlineDate) desC
it doesn't return anything....
How can I change that
The secret to creativity is knowing how to hide your sources. (Einstein)
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Jan 8, 2007
Hey all,I have a datagrid with populated by this query: SELECT TABLE_NAME, TABLE_TYPE FROM INFORMATION_SCHEMA.TABLES WHERE (TABLE_TYPE = 'BASE TABLE')I have paging, sorting and selection enabled.Now I am looking for a way to use a wild card as a placeholder for the table name in my select statements so I can use the valued selected from the datagrid.Example : SELECT * FROM %TABLENAME%TIAWOOHOO! my first post.
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May 23, 2008
i got this stored procedure.
i tried to modify it and now its giving me this scaler error.
Msg 137, Level 15, State 2, Procedure insertuser, Line 4
Must declare the scalar variable "@seller_id".
USE [DBCars]
GO
/****** Object: StoredProcedure [dbo].[insertuser] Script Date: 05/23/2008 20:44:37 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[insertuser]
(@Make nchar(10),@Model nchar(10),@City nchar(10),@SellerID varchar(50),@MileAge nchar(10),@Year_Model int)
as
insert into tbcar values(@make,@model,@city,@seller_id,@mileage,@year_model);
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Feb 10, 2004
I'm have a stored procedure that iterates through a list of numbers and adds an item for each number (user id) some of these ids are duplicates which is fine even necessary for the first part of my query but for the last I need to ensure that no duplicates id's are passed to the stored procedure, in this case called 'spInsertForBackupNote'. My thoughts here was to do something like this:
SET @Note_Buffer = @UserID -- @Note_Buffer being some kind of array?
IF @Note_Buffer = @UserID -- If its been added to the buffer we dont execute sp
BEGIN
Do Nothing here
END
ELSE
BEGIN
EXECUTE spInsertForBackupNote @FK_UserID, @FK_NoteID
END
I know this would never work because it would always be false since I just added the same userid to the buffer that I want to add. But I think you see my problem. I know it should be an easy one but my TSQL is limited. I've posted the whole sp. Hope someone can help.
CREATE PROCEDURE spInsertAssignedNotesByList
@FK_UserIDList NVARCHAR(4000) = NULL,
@FK_NoteIDList NVARCHAR(4000) = NULL,
@By_Who INT,
@UserID INT
AS
SET NOCOUNT ON
DECLARE @Length INT
DECLARE @Note_Length INT
DECLARE @Note_Buffer INT
DECLARE @FirstUserIDWord NVARCHAR(4000)
DECLARE @FirstNoteIDWord NVARCHAR(4000)
DECLARE @FK_UserID INT
DECLARE @FK_NoteID INT
SELECT @Length = DATALENGTH(@FK_UserIDList )
SELECT @Note_Length = DATALENGTH(@FK_NoteIDList )
DECLARE @TempFK_NoteIDList NVARCHAR(4000) --= NULL
DECLARE @Temp_NoteLength INT
SET @TempFK_NoteIDList = @FK_NoteIDList
SET @Temp_NoteLength = DATALENGTH(@FK_NoteIDList )
-- IF @Length > @Note_Length -- If we have more users than notes
BEGIN
WHILE @Length > 0
BEGIN
IF @Length > 0
EXECUTE @Length = PopFirstWord @FK_UserIDList OUTPUT, @FirstUserIDWord OUTPUT
SELECT @FK_UserID = CONVERT(INT, @FirstUserIDWord)
IF @Length > 0
BEGIN
SET @FK_NoteIDList = @TempFK_NoteIDList
SET @Note_Length = @Temp_NoteLength
WHILE @Note_Length > 0
BEGIN
EXECUTE @Note_Length = PopFirstWord @FK_NoteIDList OUTPUT, @FirstNoteIDWord OUTPUT
SELECT @FK_NoteID = CONVERT(INT, @FirstNoteIDWord)
IF @Note_Length > 0
EXECUTE spInsertAssignedNoteDetail @FK_UserID, @FK_NoteID
SET @Note_Buffer = @UserID
EXECUTE spInsertForBackupNote @FK_UserID, @FK_NoteID, @By_Who, @UserID -- NEW HERE
END
END
END
END
--------------------------------------------------
GO
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Nov 27, 2001
I have this field in a table.
NAME
--------------------
Johnson, Bill P.
I need to cut it up into this in another table:
LAST_NAME FIRST_NAME MID_INIT
-----------------------------------------------------
Johnson Bill P
I can't use SUBSTRING command because the length of this field will change with every row.
Is there a way I can tell it to truncate past or prior to the comma or spaces?
Thanks!
Lance
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Apr 30, 2007
Hello all,
I'm working on an ASP.NET with a SQL server for database. Some of the tables, for example, contain information such as different types of Fabrics (silk, cotton, etc..) . I'd like to have this table localizable (English and French for instance). Is this possible ? Is there an equivalent of resource files in SQL server ?
Or do I have to do this manually ? (have 2 separate fields in the table for those 2 locales)
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Apr 25, 2007
This should be so easy.
All I want to do is have a cumalative counter that counts from 1 to whatever.
any ideas how i can do this?
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Sep 24, 2007
I have a DTS Package that I am running from a command line via .bat file. Does anyone know if there is a command to have the command window minimized or running in the background? I used the /Rep N command but that still leaves the window open until the package has executed.
Thanks!
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Aug 3, 2007
Hi ALl,
When I open the VarDecimal option in our SAP R3P system, I found the space used is increased.
Before turn on the option:
Total space:528315.31MB
Fee Sapce:0.00MB
After trun on the option:
Total Space:733815.31MB
Free Space:119006.31MB
it is very interestion, anyone has this experience?
thanks.
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Apr 13, 2006
in MySql:
SELECT * FROM table LIMIT 5,10
How to do this in MicroSoftSql?
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Jul 2, 2007
In a previous post, someone helped me with creating stored procedures, and I am grateful because I am transitioning from the Access World.
Anyway, I get an error at .ExecuteNonQuery in visual studio 2005 when I run the following code:
Dim strsql As String Dim strconn As String strsql = "sp_Roster" strconn = "server=xxxx; user=xxxx; pwd=xxxx; database=xxxx;" With comm .Connection = New SqlConnection(strconn) .CommandText = strsql .CommandType = CommandType.StoredProcedure With .Parameters.Add("TeacherID", SqlDbType.Char) .Value = "DawsMark@aol.com" End With With .Parameters.Add("ClassID", SqlDbType.Int) .Value = classid End With With .Parameters.Add("sID", SqlDbType.Int) .Value = ssID End With With .Parameters.Add("sLastName", SqlDbType.Char) .Value = lastname End With With .Parameters.Add("sFirstName", SqlDbType.Char) .Value = firstname End With With .Parameters.Add("sMiddleName", SqlDbType.Char) .Value = middlename End With With .Parameters.Add("Student", SqlDbType.Char) .Value = fullname End With With .Parameters.Add("Password", SqlDbType.Char) .Value = password End With .Connection.Open() .ExecuteNonQuery() With comm.Connection If .State = ConnectionState.Open Then .Close() End If End With End With
The error was: Error converting data type char to int.
The stored procedure in sql server was as follows
CREATE PROCEDURE sp_Roster -- Add the parameters for the stored procedure here@TeacherID varchar(50),@ClassID int,@sID int,@sLastName varchar(50),@sFirstName varchar(50),@sMiddleName varchar(50),@Student varchar(50),@Password varchar(50)ASBEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; -- Insert statements for procedure here INSERT INTO Roster (TeacherID, ClassID, sID, sLastName, sFirstName, sMiddleName, Student, Password) VALUES (@TeacherID, @ClassID, @sID, @sLastName, @sFirstName, @sMiddleName, @Student, @Password)ENDGO
The error also says "sqlexception was unhandled by user code.
This is strange because this code worked perfectly when connecting to Access and when I used oledb.
So how is it the code's problem? Is the stored procedure causing the error or the code. Can someone please help. thanks.
<Edited by Dinakar Nethi>
Please mask your useird/pwd info in the connection string when posting to a public forum like this
</Edit>
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Jul 4, 2005
I would like to write a fun or stored procedure to do some operation. It require me to know that what category is currently belong to certain people(people_table: category_table1 to Many)However, when i use the select statement in stored proc, it return a set of result, not a scalar , therefore, i cannot use the variable to hold it. In addition, there are no array in SQL server.Question:1. Is there any way to hold the collection of result(like array)?2. Also, how to determine to use fun or stored procedure?(Since a integer is need to return by them)Thx
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Sep 15, 2005
Every morning our sql server runs very slowly which means our log on
page times out on a simple query. If we stop and start the sql server
everything runs fine for the rest of the day until the follwing
morning. the server is not used out of business hours excpet for a few
very small and simple jobs to delete records, These all run to
completion. Any help with this would be much aprreciated! Thanks.
Rob
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Aug 20, 2003
Hi ..
i am SqL beginner. i having trouble output what i want from table.
table contain 3 columns
________________________________
|(names)|(item)|(location)|
1.| Jimmy | pizza| TX |
2.| Joe | ball | CA |
3.| Joe | ball | WA |
4.| Jim | shoes| AZ |
________________________________
i try to select all records out from this table. but column 2 and 3 contain same information in names and item only different is location. how can distinct one of them?? and display like the below, please advise.
|(names)|(item)|
1.| Jimmy | pizza|
2.| Joe | ball |
3.| Jim | shoes|
________________________________
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Jul 19, 2006
My thread titles need work, I know. :o
Ok, lets say I've got:
tblDocuments
id INT PK
documentName VARCHAR
tblUsers
id INT PK
userName VARCHAR
tblDocumentApprovals
userID INT
documentID INT
approvalDate DATETIME
If I want to get a list of documents, and the users who've signed them off (if any), I'd do something like:
SELECT [tblDocuments].[documentName], [tblUsers].[userName ], [tblDocumentApprovals].[approvalDate ]
FROM [tblDocuments]
LEFT JOIN [tblDocumentApprovals] ON [tblDocumentApprovals].[documentID] = [tblDocuments.id]
INNER JOIN [tblUsers] ON [tblUsers].[id] = [tblDocumentApprovals].[userID]
...which is lovely. Except - I don't want a row returned for each user that's signed it off. I want one row for each document, with a field containing a list of the people who've signed it off.
I know that it's bad design. I was reading an article only yesterday on how they're putting this kind of thing into the latest version of Access, and how it's a bit of a kludge. But it'd really, really help me.
How do you do it?
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Sep 18, 2007
Hi,
I have seen many examples at MSDN library related to SQL Querries in all queries one thing is same the way they use tables in there queries. BUT wht is this really i am not getting this, can anyone tell me.. the code and the problem is as follows:
Code Snippet
FROM Purchasing.ProductVendor JOIN Purchasing.Vendor
ON (ProductVendor.VendorID = Vendor.VendorID)In the above code u see "Purchasing.ProductVendor", I want to ask that wht is this
Purchasing Stands for, If we suppose that purxchasing is the database name then also
normally we use database name as Purchasing.dbo.ProductVendor BUT I am not getting that
what is this,
Please if someone knows then explain it to me,
Thanks.
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May 10, 2004
I have a query stack that uses local variables that I declare & set at the top. That stack takes a minute & runs the processor at 100%. If I substitute actual values in place of the variables the stack runs in 10 seconds! Why!?.. I need it to run that fast with variables!
-Brian Flynn
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Apr 21, 2008
Hi, experts here,
I found a very strange problem with the OLE DB connection in SSIS package though.
What happened was when I set the connection type to be OLE DB, whenever I declare a package variable it still gives me the error saying: please declare the scalar variable.
Once I changed the connection type to be ADO.NET, then it works fine.
Why is that? Anything wrong with OLE DB connection?
Looking forward to hearing from you for any ideas on it.
Best regards,
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Feb 22, 2008
...we understand that perhaps some xp's might come with the product, but for sp's that we author ourselves, are they two different things in 2005, and if so, why would one be chosen over the other?
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Dec 6, 2005
Dear Anyone,
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Jan 24, 2005
I have a table which contains suppliers that can supply certain articles.
There can be many suppliers to each article, and therefore there is a field that tells you if this supplier is the main supplier for the article, this field is called "arthuvudavt". However, you aren't forced to use this field in the table.
As a alternative you can use priority. Each supplier has given priority where
0 means "most preferred" and any other means "less preferred"
What I want to do is to pick the right supplier for a given article in one SQL-statement regardless of if you choose to use the priority or if you choose to use the main supplier field.
Abbreviated description of the table, called AL.
SuppNo Article Arthuvudavt Prio
10101 A-10 NULL 0
10202 A-10 1 0
10303 A-10 NULL 1
10101 B-10 NULL 0
10202 B-10 NULL 0
10303 B-10 NULL 1
10101 C-10 NULL 1
10202 C-10 NULL 0
10303 C-10 NULL 1
In the above case, I'd like the statement to return supplier 10202 for article A-10 (the one that has the arthuvudavt checked), and
only one row for B-10, which one doesn't really matter, since someone has been making a fault here, this should not happen, but my SQL-statement should break because of this scenario. For C-10 supplier 10303 should be returned.
Is there any way this could be done?
The reason I ask is that I try to learn new ways of solving things, and this problem was kind'a easily solved using variables, but I was wondering if it was possible to do it without it.
Thanks in advance
Jonas
Sorry for the poor formatting, I didn't have the time to make it right.
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Jun 22, 2006
1) I have the Beta Preview of Roger Wolter's book on the subject. Has anything major changed from the beta version to the full version (of the book as well as the product)?
2) I want to build a front-end that queues requests for processing that is ultimately done by a standalone console application. The console app knows nothing about SQL Server 2005, so the database will have to fork/execute this app, pass it arguments on its command line, and pick up the result (written to either standard output or standard error) when it finishes. Is this possible with Service Broker? If so, how?
TIA
Andrew
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Feb 4, 2007
How can I set a one-to-one relationship using the Management Studio Express and SQL Server 2005 Express
tblClient, CleintID (PK)
tblProcess, ClientID (FK)
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Feb 22, 2007
Hello
I have need to write a query that I can pass in a bunch of filter criteria, and return 1 result....it's just ALL of the criteria must be matched and a row returned:
example:
Transaction table: id, reference
attribute table: attributeid, attribute
transactionAttribute: attributeid, transactionid
Example dat
Attribute table contains: 1 Red, 2 Blue, 3 Green
Transaction table contains: 1 one, 2 two, 3 three
transactionAttribute contains: (1,1), (1,2), (1,3), (2,3), (3,1)
If I pass in Red, Blue, Green - I need to be returned "one" only
If I pass in Red - I need to be returned "three" only
If I pass in Red, Green - nothing should be returned as it doesn't EXACTLY match the filter criteria
If anyone's able to help that would be wonderful!
Thanks, Paul
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Aug 3, 2007
How to create a relation between gf_game and gf_gamegenre here? gf_gamegenre is responsible for the relation between a game and it's genre(s). The relationship between gf_genre and gf_gamegenre worked. (http://img361.imageshack.us/my.php?image=relationzl9.jpg)
When I try to set a relationshop between gamegenre and game I'm getting this error:
'gf_game' table saved successfully'gf_gamegenre' table- Unable to create relationship 'FK_gf_gamegenre_gf_game'. The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK_gf_gamegenre_gf_game". The conflict occurred in database "gamefactor", table "dbo.gf_game", column 'gameID'.
Thanks for any help!
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Aug 12, 2002
Can anyone provided insight on how to create a one-to-one relationship between
SQL tables? Every time I try to link two tables that should be one-to-one, the link says one-to-many.
How can I specify one-to-one when SQL Server automatically thinks it is a one-to-many?
Thanks,
Kellie
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May 22, 2006
hi all,
how to implement the many to many relation ship....
i get stucked it.......
plz help
thanx
sajjad
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Jul 18, 2006
Hey,
I know I'm asking a stupid question but I need to get a clear response please:
why using One-to-One relationship instead of meging the 2 tables in only one?
thanks.
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