Foreign Key Reference Issue
Jun 12, 2008
Hi All,
Table FACT1 is located on SERVER1 & Database - DBS1 (SQL Server 2000) with a column 'Date_fk'
Table DIM1 is located on SERVER2 & Database - DBS2 (SQL Server 2005) with a column 'Date_pk'.
I m trying to create a foreign key relation ship as follows:
ALTER TABLE [dbo].[FACT1] WITH CHECK ADD
CONSTRAINT [FK_Issue] FOREIGN KEY([Date_fk])
REFERENCES [SERVER2].[DBS2].[DIM1] ([Date_pk])
but it throws the foll. error
Foreign key 'FK_Issue' references invalid table 'SERVER2.DBS2.DIM1'.
Please let me know if i m missing anything.
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Nov 2, 2007
Hi,
I don't know if this is possible, i believe not, so I'm here to ask the experts if is possible to have a foreign key constraint that references the key of one of two tables.
Like this:
I have 3 tables: TABLE X, TABLE A and TABLE B
Is it possible to the FK on TABLE X refernce the PK of TABLE A OR TABLE B?
If yes, how can I do this?
If not, I need to have a fourth table, so TABLE X references TABLE A and TABLE Y references TABLE B.
Thanks!
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Oct 26, 2007
The following SQL statements give me an error on the last line:
CREATE TABLE Employees (id int PRIMARY KEY NOT NULL, name nvarchar(50));
CREATE TABLE RandomTable (uniq int PRIMARY KEY NOT NULL, empid1 int NOT NULL, empid2 int NOT NULL);
ALTER TABLE RandomTable ADD CONSTRAINT RandomTable_FKey_1 FOREIGN KEY (empid1) REFERENCES Employees (id) ON DELETE CASCADE;
ALTER TABLE RandomTable ADD CONSTRAINT RandomTable_FKey_2 FOREIGN KEY (empid2) REFERENCES Employees (id) ON DELETE CASCADE;
The error is:
"The referential relationship will result in a cyclical reference that is not allowed."
Um...how is this cyclical? Is it because I have multiple cascade paths? If so, how do I go about doing the same thing?
Thanks,
Jeff
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Jul 23, 2005
I'm trying to create a local copy of a popular CRM database calledSalesforce.com. Many of the tables in the DB have FOREIGN KEYreferences that I want to preserve, but I've run into a chicken and eggproblem. Table "A" has a reference to table "B," and table "B" has areference to table "A." So I can't CREATE one until the other exists.Is there a way to disable these checks until I've created all theschema?Here's what I see (error first, then SQL that caused it):Server: Msg 1767, Level 16, State 1, Line 1Foreign key 'FK__UserRole__LastMo__48CFD27E' references invalid table'User'.Server: Msg 1750, Level 16, State 1, Line 1Could not create constraint. See previous errors.CREATE TABLE salesforce3.dbo."UserRole" ("Id" varchar(18) PRIMARY KEY ,"Name" varchar(40), "ParentRoleId" varchar(18) REFERENCES"UserRole"(Id), "RollupDescription" varchar(80),"OpportunityAccessForAccountOwner" varchar(40),"CaseAccessForAccountOwner" varchar(40), "LastModifiedDate" datetime,"LastModifiedById" varchar(18) REFERENCES "User"(Id), "SystemModstamp"datetime);CREATE TABLE salesforce3.dbo."User" ("Id" varchar(18) PRIMARY KEY ,"Username" varchar(80), "LastName" varchar(80), "FirstName"varchar(40), "CompanyName" varchar(80), "Division" varchar(80),"Department" varchar(80), "Title" varchar(80), "Street" text, "City"varchar(40), "State" varchar(20), "PostalCode" varchar(20), "Country"varchar(40), "Email" varchar(80), "Phone" varchar(40), "Fax"varchar(40), "MobilePhone" varchar(40), "Alias" varchar(8), "IsActive"bit, "TimeZoneSidKey" varchar(40), "UserRoleId" varchar(18) REFERENCES"UserRole"(Id), "LocaleSidKey" varchar(40), "ReceivesInfoEmails" bit,"ReceivesAdminInfoEmails" bit, "EmailEncodingKey" varchar(40),"ProfileId" varchar(18) REFERENCES "Profile"(Id), "LanguageLocaleKey"varchar(40), "EmployeeNumber" varchar(20), "WirelessEmail" varchar(80),"LastLoginDate" datetime, "CreatedDate" datetime, "CreatedById"varchar(18) REFERENCES "User"(Id), "LastModifiedDate" datetime,"LastModifiedById" varchar(18) REFERENCES "User"(Id), "SystemModstamp"datetime, "UserPermissionsMarketingUser" bit,"UserPermissionsOfflineUser" bit, "UserPermissionsWirelessUser" bit,"UserPermissionsSuperCssUser" bit, "UserPermissionsAvantgoUser" bit);
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Sep 10, 2014
I am using vs 2010 to write my dtsx import scripts.I use a script component as a source to create a flat file destination file.Everything have been working fine,but then my development machine crashed and we have to install everything again.Now when i use the execute package utility to test my scripts i get the following error:
Error system.NullReferenceException: Object refrence not set to an instance reference.
In PreExecute section
TextReader = new system.io.streamreader(" file name")
In the CreateNewOutputRows:
dim nextLine as string
nextLine = textReader.ReadLine
[code]...
is there something which i did not install or what can be the error?
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Feb 6, 2004
Hi y'all
Does anybody know reference or pdf file or free e-learning on the web?
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Jun 18, 2001
DECLARE Loan_cursor CURSOR FOR
SELECT Loan_No,store
FROM loan
WHERE maturity_date > '2001-04-30' and loan_no like 'ABL%'
OPEN Loan_cursor
-- Perform the first fetch.
FETCH NEXT FROM Loan_cursor
-- Check @@FETCH_STATUS to see if there are any more rows to fetch.
WHILE @@FETCH_STATUS = 0
BEGIN
Declare @LoanNo varchar(12)
** Set @LoanNo = Loan_No
-- This is executed as long as the previous fetch succeeds.
FETCH NEXT FROM Loan_cursor
END
CLOSE Loan_cursor
DEALLOCATE Loan_cursor
when l run the cursor l get the error
Server: Msg 207, Level 16, State 3, Line 15
Invalid column name 'Loan_No'.
.
If l reference it as Set @LoanNo = LoanTable.Loan_No l get the error
Server: Msg 107, Level 16, State 3, Line 15
The column prefix 'loan' does not match with a table name or alias name used in the query.
All l'm trying to do is to compare the loan number that l get from the cursor to the value in the loans table. Maybe reference is a better word
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Jun 6, 2008
Hi friends,
Just i modified one sub stored procedures which is not getting affected in the main stored procedures
Create procedure main
as
begin
set nocount on
--First sp
exec Data_transfer_sp
--Second sp
Exec Clearance_sp
set nocount off
end
In data_transfer_sp,i have commented the select statement
but still iam use to the select result while execution the main sp.
Note:I have compiled the data_transfer_sp after making comment
.Txs in advance
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Sep 11, 2007
Hi All ...
WITH myCTE (x,y,z) AS (SELECT x,y,z, from myTable)
SELECT x,y,sum(z) from myCTE
SELECT y,z,sum(x) from myCTE
the second SELECT fails, and says invalid object name. does the CTE go out of scope after i reference it once?
never mind the semantics of what I am SELECTing, I just want to be able to reference the CTE more than once in my SP
am I trying to use the CTE in a way that was not intended?
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Sep 11, 2007
Hi All ...
WITH myCTE (x,y,z) AS (SELECT x,y,z, from myTable)
SELECT x,y,sum(z) from myCTE
SELECT y,z,sum(x) from myCTE
the second SELECT fails, and says invalid object name. does the CTE go out of scope after i reference it once?
never mind the semantics of what I am SELECTing, I just want to be able to reference the CTW more than once in my SP
am I trying to use the CTE in a way that was not intended?
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Oct 15, 2007
hi ,
can any body help me that how can i use my .net dll into my rdl file.
thanks
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Feb 3, 2008
in this code ,whtat is the references of
RelationalDataSourceView
and also
what are the references of these?
OleDbConnection
OleDbCommand
OleDbDataAdapter
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Nov 16, 2006
Can anyone see why I would get the 'Object Referenece not set to an instance of an object error in the following code?
It happens on this line:
MyAdapter.SelectCommand = New SqlCommand(SelectStatement, MyConnection) 'Populate the text boxes from database for alumni fields.
Dim MyAdapter As SqlDataAdapter
Dim MyCommandBuilder As SqlCommandBuilder
Dim DetailsDS As DataSet
Dim Row As DataRow
Dim SelectStatement As String = "Select ClientID,ClassYear,HouseName,CampusName,EducationMajor,GraduationDate FROM tblclient Where [ClientID]=" & _
ClientIDSent
Dim ConnectStr As String = _
ConfigurationManager.ConnectionStrings("TestConnectionString").ConnectionString
Dim MyConnection As SqlConnection = New SqlConnection(ConnectStr)
MyAdapter.SelectCommand = New SqlCommand(SelectStatement, MyConnection)
MyCommandBuilder = New SqlCommandBuilder(MyAdapter)
MyAdapter.Fill(DetailsDS, "tblClient")
Row = DetailsDS.Tables("tblClient").Rows(0)
ClassYearText.Text = Row.Item("Classyear").ToString()
HouseNameText.Text = Row.Item("HouseName").ToString()
CampusNameText.Text = Row.Item("CampusName").ToString()
EducationMajorText.Text = Row.Item("EducationMajor").ToString()
GraduationDateText.Text = Row.Item("GraduationDate").ToString()
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Jan 21, 2004
Hi,
I'm looking for a good reference guide online as I am more used to mysql (and stil quite limited vocab at that)
I create table outside of a database by accident and I'm now looking for the sql syntaxt for moving tables, but I can't find it anywhere?
most simple guides don't seem to provide the syntax to do this. :(
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does any one know any good pages to get some sql commands
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Sep 20, 2000
Hi,
I am access SQL 7 via ADO in some ASP pages. My database objects were created under a user name aliased to the dbo. As a result, when I have my client logon to make a connection, I have to preface all my object references with the name of the owner, i.e., Select * from mydboname.people . Is there a way to avoid having to prefix all my transact sql statements with the owner?
thanks,
steve
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Sep 1, 2004
I have two tables that are reference to each other by foreign key, now I would like to alter the table so the it doesn't reference each other any more. What is the syntax to alter a table so that the fk field doesn't reference a table anymore. Thanks in advance for the help.
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What would you recommend for a good MDX book ?
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thx
C
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Jun 21, 2008
As I posted earlier, I am relatively new to TSQL. I have been given a few books:
O'Reilly SQL on SQL Server 2005
O'Reilly SQL in a Nutshell
Mastering SQL Server 2005 - Sybex
Beginning SQL Server 2005 Programming - Wrox
I have a copy of SQL2005 Developers Edition on a development server. So I think I have some decent tools at my disposal.
I was wondering if there are any other sites or forums that might be suggested for learning SQL programming? Right now, I am just making stuff up and following examples in books, etc. I would like to find a site where there are beginner level projects for no other purpose than educational. Something where I can get more hands on of the design and programming aspects. Just to practice.
Thanks,
grinch
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Jun 14, 2006
i have this code,
CREATE TABLE s
(sno VARCHAR(5) NOT NULL PRIMARY KEY,
name VARCHAR(16),
city VARCHAR(16)
)
CREATE TABLE p
(pno VARCHAR(5) NOT NULL PRIMARY KEY,
descr VARCHAR(16),
color VARCHAR(8)
)
CREATE TABLE sp
(sno VARCHAR(5) NOT NULL REFERENCES s,
pno VARCHAR(5) NOT NULL REFERENCES p,
qty INT CHECK (qty>=0),
PRIMARY KEY (sno, pno)
)
when i run this query i get an error saying:
Column 's.sno' is not the same length as referencing column 'sp.sno' in foreign key 'FK__sp__sno__5EBF139D'. Columns participating in a foreign key relationship must be defined with the same length.
can anyone assist me what to be done?
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Jul 14, 2006
Hi ,
I have the following structure:
Item table
----------
ItemId
ItemName
Item Transaction Table
----------------------
TransactionId
GiverItemId
SenderItemId
the data is somewhat like this:
Item table
__________
1abc
2xyz
3pnr
4rew
5dds
6djs
7dsf
Item Transaction table
---------------------
112
224
343
437
Now i have a reauirement to build a stored proc in which all the transactions starting from one transaction like, if i want to know the chain for item no 2 it shall give the following result:
24
43
37
if i want to know the chain for item no 3 then it shall give following
37
if i want to know the chain for item no 1 then it shall give following
12
24
43
37
Please help.. Its urgent.....
Thanks
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Mar 27, 2008
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I need to parse SQL statements directly and extract each segmentindividually. Is there a way reference the Microsoft SQL Parserdirectly from VB.Net?Thanks!*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Jan 12, 2007
Hello everyone !
Given a UDT, is there any way to get a reference to the table where the specific instance is running ?
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When an insert/update/delete operation on ATable or BTable occurs, the UDTPoint class needs to verify in which context it is running (ATable or BTable) before doing operations on data.
Is there any way to achieve that ?
Thanks
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Apr 21, 2008
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Feb 6, 2008
Hi,
Our tables have a reference field which users can enter their own references into.
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In our system, reference AAAA is greater than reference ZZZ; the next reference after AAAA is AAAB.
How would I calculate the greatest current reference in the table?
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Aug 2, 2007
Hi:
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ty
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Nov 24, 2006
The table above is my users table. It allows for a user to be at multiple sites or multiple locations within a single site or multiple sites. Would it be wise to use a auto incrementing primary key instead of the 3 column composite key? The reason I ask is because if I am referencing this SU table (which I will be a lot), a lot more data would be replicated to the tables which have the foreign key to this table, right? But if I used a single incrementing column as the primary key, only a small integer would be used as the foreign key, saving space?Does this make sense?
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Feb 27, 2007
Please help as I've no idea what to try next!
I had a 2003 project designed by someone else. I upgraded it to 2005 using the conversion wizard.
Now it all works find within vs2005, I deploy it to a location else where on my pc and create a virtaul directory and map it so that I'm using IIS. This all works fine.
As soon as I move it to a virtual machine (windows 2k server SP4 IIS5) I get object reference not set to an instance, basically what I can determine is my sqlconnection fails when it is opened. Can anyone tell me?
Private Sub DoLogin(ByVal bLogin As Boolean)
If bLogin Then
strQueryString = "exec MyQuery'"
End If
dsVerifyPW = GetDataSet(strQueryString, Application("SQL_Connect")) '***
.......
web.config
<configuration>
<appSettings/>
<connectionStrings>
<add name="MyConnectString" connectionString="Server=(local);Database=MyDB;Persist Security Info=True;User ID=Uzer;Password=Uzerpwd" providerName="System.Data.SqlClient"/>
</connectionStrings>
<system.web>
*****************************Below from App_Code folder MyModule.vb
Imports System.Data
Imports System.Data.SqlClient
Imports System.Security.Cryptography
Imports System.Web.Mail
Imports System.Text.RegularExpressions
Namespace My.NET
Public Module MyModule
Public Function GetDataSet(ByVal strSQL As String, ByVal strSQL_Connect As String) As DataSet
Try
Dim cnSQl As New SqlConnection(strSQL_Connect)
cnSQl.Open() '**********fails here
Dim dsLoad As New DataSet
Dim cmdLoad As New SqlCommand(strSQL, cnSQl)
Dim daLoad As New SqlDataAdapter(cmdLoad)
daLoad.Fill(dsLoad, "ReturnedData")
GetDataSet = dsLoad
cnSQl.Close()
Catch sqlex As SqlException
GetDataSet = Nothing
Catch ex As Exception
GetDataSet = Nothing
End Try
End Function
from Global.asax.vb on application start up
Application("SQL_Connect") = ConfigurationManager.ConnectionStrings("VacationConnectString").ConnectionString
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