Retrieve First Row Only In Many-to-many Relationship
Jul 20, 2005
I have a db with three tables - books, sections, and a joining table.
The normal way of getting a many to many relationship (i.e. one book
may belong to many sections, and one section may contain many books)
I want to extract the data with a single row for each book so that I
only retrieve the first section description for any book. (e.g. title,
author, section, description)
Structure as follows:
tbl_book
book_id, title, author, description etc...
tbl_section
section_id, section_desc
tbl_book_section
book_id, section_id
DBA is away and I can't figure this out at all...any help gratefully
received.
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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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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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May 19, 2007
Hi,
do you use ISA relationship or do you avoid it? Why?
Could you write me some its benefitsand drowback?
Thanks
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Aug 30, 2005
Hey,
is it possible to get the relationship of a table via sql? Like I need to know which relations the table t has. Is that possible?
Thanks
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Jul 23, 2005
I created 2 tables with one to one relationship. if I add a record intable A, how does table B record get created? Does SQL do thisautomatically because it is one to one relationship? or do I need tocreate a trigger? if i need a trigger, how do I get the ID of newrecord to create the same ID in table B?thanks for any help.Joe Klein
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Oct 10, 2005
Hi,Do you guys know what's wrong with a one-to-one relationship?The reason I want to make it like this is that at the very end of the chain,the set of keys is huge. I want to limit the number of columns to be thekey. i.e. the [company] table has 1 column as the key. The [employee]table will have 2 columns as the key.e,g,If I add a [sale] table to the [company]-[employee] relationship, the thirdtablewill have 3 columns as the key -- "company id", "employee id", and "saleid".(e.g.)I have a company with many employees and computers. But instead of classifyall these, I just want to call all these as an entity. A company is anentity. An employee is just another entity. etc.So, instead of a one-to-many:[company]---*[employee]---*[sale]||*[computer]I make it one-to-one.[entity]---*[entity]If I want to know the name and address of the entity "employee", I will havea 1-to-1 table [employee] to look up the information for this employeeentity.[entity]---*[entity]||[company]||[employee]||[computer]||[sale]--[color=blue]> There is no answer.> There has not been an answer.> There will not be an answer.> That IS the answer!> And I am screwed.> Deadline was due yesterday.>> There is no point to life.> THAT IS THE POINT.> And we are screwed.> We will run out of oil soon.[/color]
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Feb 14, 2006
How do I create a one to one relationship in a SQL2005 Express database? The foreign key needs to be the same as the primary key so it can't just increment to the next number.
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Nov 17, 2007
Hi.
I get this error when i try to create a relationship in a db diagram (sql 2005)
"'tblActivedir' table saved successfully
'tblClient' table
- Unable to create relationship 'FK_tblClient_tblActivedir1'.
Introducing FOREIGN KEY constraint 'FK_tblClient_tblActivedir1' on table 'tblClient' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
Could not create constraint. See previous errors."
What i have is 2 tables.
1 named client
1 named activedir
In the client table the columns i want to bind with activedirtable are FR1 and DC1
I want to bind them in the ID of the activedir table (both, in different fk relationships) so that they get the id of activedir.
Fr1 has an fk relationship with activedir (pk is activedir' id)
and DC1 exactly the same in another fk.
So i want both columns to comunicate with activedir.
If p.e. activedir has 3 elements (a,b,c) when i delete element a then werever FR1 or DC1 have this element(binded to it's id) then the element will also be deleted (id of the element) from both FR1 and DC1
I don't want to set Delete and Update action to none because i want the element changed or deleted from activedir, to do the same on Fr1 or DC1 or both.
Any help?
Thanks.
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Nov 2, 2006
I am trying to create a 1:1 relationship, but not primary key to primary key. In table 1 I have a uniqueidentifier as a primary key. In table 2 I have an int as the primary key and a column that takes the uniqueidentifier from table 1. Everytime I drag and drop the relationship line and link table 1 to table 2 it creates a 1:N relationship: ie. tbl1.primarykey links to tbl2.column2. So I'm not linking primary key to primary key however I still want a 1:1 relationship.
How do I do that?
Thanks in advance.
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Jan 24, 2008
SQLServer 2005 - I have two tables. One has a field defined as a Primary Unique Key. The other table has the same field, but the Index is defined as non-Unique, non-clustered. There is no primary key defined on the second table. I want to set up a one-to-many relationship between the two, but am not allowed.
This should be simple. What am I doing incorrectly?
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Apr 22, 2007
This is the message that i get when trying to assign keys when creating diagrams in visual express:
'tbh_Polls' table saved successfully
'tbh_PollOptions' table
- Unable to create relationship 'FK_tbh_PollOptions_tbh_Polls'.
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK_tbh_PollOptions_tbh_Polls". The conflict occurred in database "C:USERSSTICKERDOCUMENTSMY WEB SITESPERCSHARPAPP_DATAASPNETDB.MDF", table "dbo.tbh_Polls", column 'PollID'.
PollID is my primary key in tbh_Polls
And PollID is in tbh_PollOptions table
No matter what I do, I get this message, I'm Lost!
Help plz.
Thanks
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May 19, 2008
I have a fact table with 2 fields : "Dim Code 1" and "Dim Code 2" that I want to link with a Dim table.
I don't want to create two dimensions Dim1 and Dim2 but only one dimension with something like :
Code Snippet
Dim.Code=Fact.DimCode1 OR Dim.Code=Fact.DimCode2
Is it possible to do this ?
Thanks in advance
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Nov 23, 2007
Hi.
(Sorry if i am not posting this in the right forum)
well i am learning to create a small software and have come up with four tables which are as follows;
Client
date
<!--[if !vml]--><!--[endif]-->client_id
name
address
contact_num
Smoking
smoking_id
client_id
meas_arm
meas_neck
meas_shoulder
Color_code
description
Trousers
trousers_id
client_id
meas_leg
meas_hips
meas_waist
color_code
description
Shirt
shirt_id
client_id
meas_arm
meas_neck
meas_shoulder
color_code
description
My question
Is it possible to have a relationship linking one single table to other several one.
For example i wanted to relate the field client_id from table client which is the primary to tables shirt,trousers and smoking with the client_id field which is the foreign key ?
thanks
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Nov 22, 2006
Hi there everyone, this is my first post so go easy on me :)
Basically I am trying to get my database to copy the value in the UserId (unique identifier field) from the aspnet_Users table to a foreign key UserId in a table called userclassset. I have made this field the same datatype and created a relationship between the two. Unfortunately, when I add a user using the ASP.Net configuration tool it does not automatically copy this value into my own custom table. I have noticed it is however automatically copied into the aspnet_Membership table. Any pointers on how to solve this would be great!
Thanks :)
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Dec 18, 2006
Hi, how can i make optional relationship?
for example: In table A, there is column 1, column 2, column3. In table B, there is column 4, column 5 and column 6.
column 1 and column 2 are primary keys for table A and table B. The relationships between table A and table B are column 2 and column 5; column3 and column 6. but optional (ie. when data exists in column 2, then column3 is null)
how can i set the relationship? because one of the columns data is null each time, error always occurs.
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Apr 5, 2007
Hello, I created some SQL 2005 tables using Microsoft SQL Server Management Studio. I need to get the script code of those tables. I was able to do that by right clicking over each table. But how can I get the code for the relationships between the tables? Can't I create relationships between two tables by using T-SQL? Thanks, Miguel
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Jul 3, 2007
When I try to insert a record on my DB (SQL 2005 Express) I get a constraint error. This is my table setup which has been simplified to expose the problem I have:
Categories TABLEint CatId PKvarchar CatName :
Items TABLEint ItemId PKvarchar ItemName :
X_Items_Categoriesint CatIdint ItemId
So basically I have a one-to-many relationship between Items and Categories, in other words each item is associated to one or more categories and this association is done via the X_Items_Categories cross table. On this cross table I set two constraints:
The CatId of each entry in the cross table (X_Items_Categories) must exist in the Category table, and
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Oct 4, 2007
Hi there, I just set up my AppData and i'm trying to connect the Membership to a tbl_Profile that i created.I notice there's an application_id and a user_id which are uniqueidentifiers. I've been trying create a relationship to tbl_Profile's user_id column but it won't let me saying it's not compatible. Am i suppose to set tbl_Profile's user_id column to int or uniqueidentifier? I've tried both and it won't let me... THanks!
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Dec 20, 2007
hi all geeks,
I have a problem regarding joins.
I have 2 tables,
Customer ( Customer_code, Agent1, Agent2, Agent3)
Agent( Agent_Code, Agent_name)
and data is like this:
Customer_code
Agent1
Agent2
Agent3
1
1
2
3
2
2
3
4
3
1
4
3
Agent Table
Agent_Code
Agent_name
1
X
2
Y
3
Z
4
P
5
Q
Now I want to retrieve all customer_code with their corresponding agent names, like 1 X Y Z2 Y Z P3 X P Z, any suggestions please,thanks a lot.
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Jan 7, 2008
HiI have 2 tables one is called QuickLinks and another called QuickLinkItemsQuickLinksQuickLinkID<PK> UserID QuickLinkName-------------------------- ----------- ------------------------1 111-111-111-111 QuickLink12 111-111-111-111 QuickLink23 222-222-222-222 QuickLink1 QuickLinkItemsQuickLinkID <FK> CharacterName CharacterImagePath---------------------- ------------------------------- ---------------------------------------- 1 a path11 b path22 d path32 e path43 a path14 b path 2 So thats how I see the data will look like in both of these tables the problem however I don't know how to write this into Ado.net code. Like I have made a PK to FK relationship on QuickLinkID(through the relationship builder thing). I am just not sure how to I do this. For the sake of an example say you have 5 text boxes 2 text boxes for inserting the character names and 2 text boxes for inserting the CharacterImagePath. Then one for the Name of the QuickLink. So how would this be done? Like if it was one table it would be just some Insert commands. Like if this was all one table I would first get the userID from the asp membership table then grab all the values from the textBoxes and insert them where they go to and the QuickLinkID would get filled automatically. The thing that throws me off is the QuickLinkID since it needs to be the same ID as in the QuickLink table. So do I have to first insert some values into the QuickLink table then do a select on it and grab the ID then finally continue with the inserts Into the QuickLinkItems table? Or do I have to join these tables together?Thanks
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Feb 2, 2008
hi there, after a lot of fussing about i found it would be a lot easier to use an SQLDS and a gridview to display my data rather than code it. However i cant for the life of me work out how to replace some of the numbers (IDs) with their accompanying names. so i have a QTY which is an INT and a Location1 which is an INT in tbl_stock_location and in tbl_locations i have the appropiate 1 = shop etc this is what i came up with for my string
SELECT tbl_stock_part_multi_location.stock_part_multi_location_ID, tbl_stock_part_multi_location.stock_ID, tbl_stock_part_multi_location.Description, tbl_stock_part_multi_location.Qty1, tbl_stock_part_multi_location.Location1, tbl_stock_part_multi_location.Qty2, tbl_stock_part_multi_location.Location2, tbl_stock_part_multi_location.Qty3, tbl_stock_part_multi_location.Location3, tbl_stock_part_multi_location.Qty4, tbl_stock_part_multi_location.Location4, tbl_stock_part_multi_location.Qty5, tbl_stock_part_multi_location.Location5 FROM tbl_stock_part_multi_location INNER JOIN tbl_location ON tbl_stock_part_multi_location.Location1 = tbl_location.Location_ID AND tbl_stock_part_multi_location.Location2 = tbl_location.Location_ID AND tbl_stock_part_multi_location.Location3 = tbl_location.Location_ID AND tbl_stock_part_multi_location.Location4 = tbl_location.Location_ID AND tbl_stock_part_multi_location.Location5 = tbl_location.Location_ID WHERE (tbl_stock_part_multi_location.stock_ID = @stock_ID)"
I used the query builder for this but it just dosnt seem to work and throws an error at me. Any help would be great!
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Feb 7, 2008
Hi I have two tables:
1.) Operator-OperatorID{PK, int, not null}-OperatorName{varchar(100), not null}-Enabled{bit, not null}-PasswordChange{bit, not null}-BirthDate{datetime, not null}
2.) Password-PasswordID{PK, int, not null}-Password{varchar(50), not null}-ExpirationDate{datetime, not null}
I'm not sure how to design and layout these two tables. The layout of these two tables is completely flexible as the application has not been deployed. I'm open to any good suggestions.
For each Operator I want to stored up to 3 previous passwords plus their current password. The password change field is so that if the operator's password expires or gets reset, they will be forced to enter a new password. This is a simple internal company application, so password encrypting is not necessary. The ExpirationDate indicates the date that the password will expire.
Hope to hear from someone soon! Thank you!
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Mar 21, 2008
HiI have a FK to PK relationship problem. I have 2 tablesQuickLinks<PK>QuickLinkItems<FK>So what I had this is I made a relationship. I put in the relationship options this. I turned off "enforce FK contraint" and I put for the delete rule "cascade". So I turned off the FK contraint since I don't think with it on the cascade delete would work. So now I tried it out. I launched my website and tried to delete something but no cascading happened. I then went to MS SQL and added some new values in and tried to delete it there(by clicking on the column and hitting delete). No cascadeing happened. What am I doing wrong?
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Aug 15, 2005
Here is the error I am getting'role' table saved successfully'users' table- Unable to create relationship 'FK_users_role'. ODBC error: [Microsoft][ODBC SQL Server Driver][SQL Server]ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK_users_role'. The conflict occurred in database 'raintranet', table 'role', column 'role_id'.table rolerole_id intname varchar 50table usersusers_id introle_id inTrying to get table.role_id to be related to role.role_idAny help would be appreciated
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Feb 20, 2006
Hi
I have a one to many relationship between two MS SQL tables.
When inserting a record in the master table (primary key is autoinc) how can I get this value for setting in the foreign key details table?
TIA
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May 29, 2006
Hi:
I'm using SQL SERVER 2005 EXPRESS
How Can I view the relationship diagram of a database on Management Studio?
Thanks!!
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