Attempt to over-write foreign key column "Code" where table A has 3 foreign keys to table XGenerating from CDM to Logical.
PD 9.5.2.889
This is a weird one - 4 tables in my model have more than one foreign key
reference to table COROrg. By default a foreign ket to COROrg generates as
COROrgKy. I have renamed the other foreign keys appropriately - e.g.
COROrgKyEmpGrp. After the rename when I generate from CDM to Logical
everything's fine for all but on of the foreign key columns (i.e. the new
name/code are maintained in all but one).
The list of changes to happen (obtained from Merge dialog -> Merge Preview)
says it's going to
'Modify Column "...
Foreign key to other table, with foreign key back to first one: ok?Is it ok for two tables to have foreign keys to each other based on the same
columns? If so, are there rules about the cascade settings in such a case? I
am thinking of tables that are virtually one-to-one with each other and can
tend to be viewed or deleted equally "from either end".
--
Steve
http://www.geocities.com/SiliconValley/Sector/6376
The first problem I see with this is that it is a "which came first, the
chicken or the egg" type of a problem.
When you insert into one table the FK is going to want to check to see if
the value is in the other...
Table design and Foreign Keys
G'day guys,I am writing a small project - of which I allow the user to select the country, and then the state in which they live. Some 'states' though, are sub-divided. For example, the United Kingdom has Scotland, England, Ireland, Wales. These are then sub divided into smaller 'states'. However, South Africa has Western Cape, Gauteng etc.. and that's their smallest division. So, I have 3 tables. Country, which has many Areas, which States.In the UK example, United Kingdom is the country, which has a few 'Areas' (Scotland, England etc), and then each Are...
integer primary/foreign key vs. varchar(255) primary/foreign keyHello.
Is there any principal performance (or some other) difference between using
the integer primary/foreign key and using the string (varchar(255)) keys in
queries that use tables joins?
Server is Sybase SQL Anywhere 5.5.04
Yes! The primary key will only be made up of 12 bytes. By using an
integer you ensure that your entire column is in the key.
--
Jim Egan [TeamPS]
Dynamic Data Solutions, Inc. http://www.dyn-data.com
Houston, TX
***********************************************************
Enterprise Applications in Your F...
Updating tables in sequence with primary key and foreign key relations
Hi all,
In my project i will have the data in a collection of objects, I need to update series of tables with foreign key relations
Right now my code looks like this
foreach(object obj in Objects){
int accountId=Account.Insert(obj.accountOpenDate,obj.accountName);//this will update the accounts table and returns account id which is a Identity column in Acccounts table
int DebtId=Debt....
Primary Keys containing common foreign keys from different tablesI have 2 tables Table 1 and Table 2 which have primary keys which include
the same foreign key from a third Table 0.
Table 1 has a primary key consisting of T1_KEY<pk> and T0_KEY<pk,fk>.
Table 2 has a primary key consisting of T2_KEY<pk> and T0_KEY<pk,fk>.
Now I want Table 3 to reference both Table 1 and Table 2 so that it has a
primary key consisting of:
T3_KEY<pk>, T0_KEY<pk, fk>, T1_KEY<pk, fk>, T2_KEY<pk, fk>
I am trying to manually reverse engineer a database for which I only have a
verbal description.
I manage to achieve ...
Two foreign keys to same table (LINQ question)
Apologies if this is the wrong place to put this, this forum needs a LINQ section!I have a table, Activities. Another table, ActivityPredecessors links an Activity with predecessor Activities. Working in Visual Studio 2008 using LINQ to SQL, I can usually access the contents of the table related by foreign key by using the foreign table's name (eg Activity.Group.grp_name). How should I do this in the case where the table which contains foreign keys has more that one foreign key to the same table? Will I need to write custom queries rather than using the built-in L...
Primary Key/Foreign KeyCan I use SQL Commands to add Primary key or reference keys to existed
tables? (Not a new table, that's why I can't use CREATE TABLE command.)
If does, could someone give me some sample codes? Thanks.
Hi John,
What you need is the ALTER TABLE statement. Look for it in SQLA help for the
syntax.
Regards,
Nat.
John Chyan wrote in message <35A4FF5D.5F192806@dissol.com>...
>Can I use SQL Commands to add Primary key or reference keys to existed
>tables? (Not a new table, that's why I can't use CREATE TABLE command.)
>
>If does, could someone ...
primary key and foreign Key????
Hi i have 2 table.. Table1UID Username1 AB2 CD3 DD Table 2ITEM Price UIDPOO1 20.00 1POO2 10.00 2POO3 15.00 1 Now i am letting the Admin to delete the user in table1But since UID 1 and 2 are ...
SQL statement failed, no primary key value for foreign key ... in table ...Problem: SQL statement failed, no primary key value for foreign key ...
in table ...
After deleting or changing primary key values in either consolidated
or remote
database.
Question:
Are there any triggers that can resolve inserting a record that has a
foreign
key value with no existing primary key value in primary table?
Description:
We have a serious problem with the dbremote program. I think it's a
general
problem that could appear in every database with related tables.
Everytime
the problem turns up we must create new remote databases from the
consolidated datab...
Primary key Hello,
I've got a modeling problem betwin a conceptual model and a physical model
and espacially about the foreign key.
See below the illustrated exemple of the problem :
-Whether the entity � ARTICLE � with two informations : CODE & WORDING
-Whether the entity � UNITE � with two informations : CODE & WORDING
An article has necesseraly three unity, the unity of command, of storage and
of sails.
These three unity can be differents.
Conceptual model
phycical model
The generated physical model doesn't suitable me.
How ...
foreign key as a primary keyhi,
I am using a foreign key (which is a primary key in a secondary table)
as a primary key in a primary table.
There is also another primary key in the primary table.
Do You have to declare the foregin key as a primary key ?
regards
Jan Eikeland
email:jaeikela@c2i.net
url :http://home.c2i.net/jaeikela
In article <368b0234.5056065@forums.powersoft.com>, jaeikela@c2i.net
says...
> hi,
>
> I am using a foreign key (which is a primary key in a secondary table)
> as a primary key in a primary table.
> There is also another primary key in the primary table...
Primary key/Foreign key againThanks, Nat and David.
Under "SQL Anywhere", I get into ISQL to use "ALTER TABLE" command
to add my primary key:
ALTER TABLE Client
ADD PRIMARY KEY (SYSID)
I got an error: user 'dba' has the row in 'Client' locked.
How can I release the locking condition?
Click on another table in Sybase Central. Is suspect this is the issue.
Dave Wolf
Jaguar Product Team
John Chyan wrote:
> Thanks, Nat and David.
>
> Under "SQL Anywhere", I get into ISQL to use "ALTER TABLE" command
> to add my primary key:
>
...
AutoUpade UserId [Foreign Key] From the Primary Key UserId in the aspnet_Users table ?
Hello everyoneI want the userId PrimaryKey in the aspnet_Users Table in the ASPNETDB.mdf to Update it's foreign key in another table called ClientInfo in the same database, Once the User is created a new userId is created, i want this userId to be automatically entered in the foreign key table ClientInfo...how can that be accomplished?
You can have a trigger on aspnet_Users table doing the insert into the ClientInfo table.Regards,PrashantDont forget to click "Mark as Answer" on the post that helped you.
thanks for the fast reply..it would be great i...