Urgent!drop Foreign Key Constraint
Mar 1, 2001I have to drop foreign key constraint from one table. How can I do that? Is it possible?
Also,
Is it possible to add a foreign key constraint on the table once it has a data?
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Database Diagrams: FOREIGN KEY Constraint Fell Off; Can't Drop/recreate It...
Mar 25, 2006Hello,
I have two tables Person & Location where Location has a primary key LocationId and Person has a foreign key LocationId.
Sometime ago I used the Database Diagrams visual tool of SQL Server Management Studio Express to create the foreign key relationship between the two tables - i.e. "visually" (drawing a line between the PK & FK LocationId elements of both tables).
Time has passed and I recently noticed that, upon retrieving my saved diagram, the foreign key relationship had "fallen off" (i.e. the many-to-one line was no longer showing in the diagram).
After recreating the relationship (redrawing the line) I find that I get an error message when I try to save the diagram:
Post-Save Notifications
[!] Errors were encountered during the save process. Some database objects were not saved.
'Location' table saved successfully
'Person' table
- Unable to create relationship 'FK_Person_Location'.
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK_Person_Location". The conflict occurred in database "mydb", table "dbo.Location", column 'LocationId'.
When I go back to the object explorer and view the dependencies for the two tables, there is no dependency (between these two tables) revealed. When I try to create the foreign key constraint manually (T-SQL) it again says can't add the constraint. It comes up with an error as follows:
ALTER TABLE Person
ADD FOREIGN KEY (LocationId) REFERENCES Location (LocationId)
Msg 547, Level 16, State 0, Line 2
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK__Person__LocationId__793DFFAF". The conflict occurred in database "mydb", table "dbo.Location", column 'LocationId'.
(Note: Each time I do this, the 8 hexadecimal character suffix changes.)
When I try to drop the foreign key:
alter table Person
drop constraint FK__Person__LocationId
it comes back with the error:
Msg 3728, Level 16, State 1, Line 2
'FK__Person__LocationId' is not a constraint.
Msg 3727, Level 16, State 0, Line 2
Could not drop constraint. See previous errors.
So it seems that there's some kind of goof up here. Can anybody shed light on this / tell me how to fix it?
Foreign Key Constraint
Aug 11, 1999student --- enrollment is 1- to - many . ssn is pk in student. ssn and courseid is pk in enrollment. later I added the foreign key constraint FK_SSN in enrollment table reference student table. it is ok.
enrollment --- lessonhistory is 1-to -many, ssn, courseid and lessonid is pk in lessonhistory . I tried to set FK_SSN foreign key constraint in lessonhistory table reference enrollment table, it always show error message " no primary key in referewnce talbe enrollment "
I don't know how to fix it. could you help me out, thanks!!
Foreign Key Constraint
Nov 20, 2011I have a created a database with nearly 20 tables in it, so I cannot post all of my statements. I am having an issue though with two tables' referential integrity when it comes to foreign key constraints. I want to constrain them to cascade updates from the primary key tables, but I keep getting the error msg 1785
Introducing FOREIGN KEY constraint 'FK__PURCHASE___ITEM___64F971E5' on table 'PURCHASE_ORDER_LINE' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
Here is the table with the primary key:
create table MERCHANDISE (
ITEM_ID varchar (8) NOT NULL PRIMARY KEY,
DESCRIPTION CHAR (60),
STANDARD_PRICE MONEY,
[code]...
I have tried making an update trigger but it does not work.
Foreign Key Constraint
Apr 25, 2006i have a publication that is composed of
many articles. The publication is composed of many
realated tables. I'm doing a snapshot replication
Is there a way to specify the order by which table
must synchonize.
lets say. article 1 synchonizes first, then article 3, then article 2
Can't Drop Constraint...?
Aug 30, 2006Hello, I have hit the wall here...can't make sense of this one.
I have a script that creates a PRIMARY KEY constraint called PK_tblDRG
CODE:
ALTER TABLE [dbo].[tblDRG]
ALTER COLUMN [record_id] Uniqueidentifier NOT NULL
Go
ALTER TABLE [dbo].[tblDRG]
WITH NOCHECK ADD PK_tblDRG PRIMARY KEY CLUSTERED
(
[record_id]
) WITH FILLFACTOR = 90 ON [PRIMARY]
All is fine with that. I run this to verify:
EXEC sp_pkeys @table_name = 'tblDRG'
,@table_owner = 'dbo' ,@table_qualifier = 'Relational_05Q3'
which returns this:
TABLE_QUALIFIERTABLE_OWNERTABLE_NAMECOLUMN_NAMEKEY_SEQPK_NAME
Relational_05Q3dbotblDRGrecord_id1PK_tblDRG
Now I want to drop the constriant if it exists:
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[PK__tblDRG]') and OBJECTPROPERTY(id, N'IsPrimaryKey') = 1)
ALTER TABLE [dbo].[tblDRG] DROP CONSTRAINT PK__tblDRG
AND I get this in return:
The command(s) completed successfully.
So, lets double check:
EXEC sp_pkeys @table_name = 'tblDRG'
,@table_owner = 'dbo' ,@table_qualifier = 'Relational_05Q3'
AND I STILL GET THIS:
TABLE_QUALIFIERTABLE_OWNERTABLE_NAMECOLUMN_NAMEKEY_SEQPK_NAME
Relational_05Q3dbotblDRGrecord_id1PK_tblDRG
Hmmmmm. Looks like the IF statement didn't do it's job. Ok fine. I'll just kill it myself:
ALTER TABLE [dbo].[tblDRG] DROP CONSTRAINT PK__tblDRG
AND I GET THIS?!?!?!?!
Server: Msg 3728, Level 16, State 1, Line 1
'PK__tblDRG' is not a constraint.
What am I not getting here? Is it me...I can take If I am a bone head here.
Any help would be appreciated. Thanks!
How To Drop Foreign Key
Jul 26, 2013I want to delete a table.This table is created with foreign key.How to remove foreign key.
View 3 Replies View RelatedDTS And Foreign Key Constraint Problem
Jan 3, 2002Hi
I am attempting to write a DTS package that copies the data across from one instance of a db on a test server to a second instance on to the live server. It has to replace all the exisiting date so I can't append. Unfortunately, the package keeps giving me errors all of the type "unable to truncate tbl due to foreign key constraints". Is there a way round this?
Thanks
Steve
Disabling FOREIGN KEY Constraint...
Jan 11, 2007sql 2000, northwind databse
code in sql analyzer:
Code:
ALTER TABLE categories NOCHECK CONSTRAINT ALL
TRUNCATE TABLE categories
ALTER TABLE categories CHECK CONSTRAINT ALL
but still i am getting the error:
Quote: Server: Msg 4712, Level 16, State 1, Line 2
Cannot truncate table 'categories' because it is being referenced by a FOREIGN KEY constraint.
what i need to do is write a query that just cleans all the tables of all data.
Introducing FOREIGN KEY Constraint
Feb 10, 2004"Introducing FOREIGN KEY constraint 'FK__APPLICANTMA__SEX__414EAC47' on table 'APPLICANTMASTER' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints."
ive a foreign key reference on the table APPLICANT MASTER
of the form
FOREIGN KEY (SEXCODE) REFERENCES
APPLICANTSEX(SEXCODE)
ON DELETE NO ACTION
ON UPDATE CASCADE,
can any one help me WHAT THE MESSAGE MEANS ?
Foreign Key Constraint Error
Apr 9, 2008Hi all, I'm new here so I hope this is the right place to post!!
I'm having a really big problem trying to make a table. I'm not new to the coding, but I'm no expert either.... as far as I can see I haven't done anything wrong...
I have many tables, but the first two are JobDetails and Promotions... in JobDetails, there is a primary key Job which needs to link to Promotions as a foreign key.... here is my code and errors, I'd really appreciate some help...
create table JOBDETAIL
(Job varchar2(15) primary key,
Dept varchar2(10) not null,
Salary number(7) not null);
create table PROMOTION
(PCID number(6) primary key,
PDate date,
Constraint fkey_p1 foreign key (Job) references JOBDETAIL(Job));
ERROR at line 4:
ORA-00904: "Job": invalid identifier
... any help would be appreciated, this is quite important... thank you!!!
Need Help Adding Foreign Key Constraint
Dec 13, 2007Here is my sqlce:
Code Block
alter table tblV
add constraint
foreign key (T_ID)
references tblT(T_ID)
on delete set null on update cascade
Error is:
Major Error 0x80040E14, Minor Error 25501
There was an error parsing the query. [ Token line number = 3,Token line offset = 1,Token in error = foreign ]
I'm new with SQL Mobile, so sorry for the novice question.
Thanks
Foreign Key Constraint Conflict
Jan 21, 2007Hi,
I am fairly new to SQL server Express and I have quite a simple database set up and I am trying to test it out with data. I have €śPain Reading€? and €śWorsen Factors€? tables with a 1: M relationship. The primary key in the Pain reading table is ReadingID which is being set using getdate() for the default value. I am getting the following error when attempting to add a new row to the €śWorsen Factors€? table:
No row was updated
The data in row 1 was not committed.
Error source:.Net SqlClient Data Provider
Error Message: The insert statement conflicted with the FOREIGN KEY constraint "FK_WorsenFactor_PainReading1". The confilct occurred in database "paindata", table "dbo.PainReading", column 'ReadingID'.
The statement has been terminated.
Any help or suggestions would be very helpful.
Thanks
Creating Foreign Key Constraint
Aug 1, 2007I have two tables; each has multi-column primary keys. I need to create a foreign key relationship between the two tables.
Sales:
DKey, int, PK
OKey,int, PK
RKey,int, PK
...
Rep:
Bkey, int, PK, identity
Rkey, int, PK
...
When I try to like Rkey from both tables as a foreign key relationship, I get an error that the columns in one table "do not match an existing primary key or UNIQUE constraint. (I've tried it both ways and get the same error.)
How can I link these two tables?
Thanks.
Error FOREIGN KEY Constraint
Dec 3, 2007
Hi,
i have two tables, one is department-Table(Master table) and other is employee-table(Child table).
DNO is a data field which is common in both the table. "DNO" is primary key in department-table and "DNO" is foreign key in child table.
I am trying to insert rows in the table i found the following error:
The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Employee_Department". The conflict occurred in database "Project", table "dbo.Department", column 'Dno'.
What's the solution to replace this error
Thanks.
Foreign Key Constraint Issue..please Help
Oct 11, 2006Hi there
Yesterday I made alot of updates to to various tables within a databse, to update some records I had to drop the foreign key constraint, but when I try to add the constraint back I get an error message (in red)
ALTER TABLE [dbo].[ITEMS] ADD
CONSTRAINT [FK_ITEMS__ITEM_CATEGORIES] FOREIGN KEY
(
[ITC_ID]
) REFERENCES [dbo].[ITEM_CATEGORIES] (
[ITC_ID]
) ON UPDATE CASCADE NOT FOR REPLICATION ,
CONSTRAINT [FK_ITEMS__ITEM_TYPES] FOREIGN KEY
(
[ITY_ID]
) REFERENCES [dbo].[ITEM_TYPES] (
[ITY_ID]
) ON UPDATE CASCADE NOT FOR REPLICATION
GO
Server: Msg 1785, Level 16, State 1, Line 1
Introducing FOREIGN KEY constraint 'FK_ITEMS__ITEM_CATEGORIES' on table 'ITEMS' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.
Server: Msg 1750, Level 16, State 1, Line 1
Could not create constraint. See previous errors
any suggestions? I tried modifying the statement to ON UPDATE NO ACTION, but I get exactly the same error message.
Any help would be much appreciated...thanks in advance
Override A Foreign Key Constraint
Aug 9, 2007A website that I'm working on has users sign in and keeps a log of the pages they go to. The log table has a foreign key in it that links to the username is the users table. I need to update the username for one of the users but the foreign key is preventing me from doing so. What is the benefit of having a foreign key like this? Can I delete it to update the username or is there a better way?
View 1 Replies View RelatedDrop And Reacreate CONSTRAINT
Oct 9, 2001ALTER TABLE doc_exe ADD
/* Add a PRIMARY KEY identity column. */
column_b INT IDENTITY
CONSTRAINT column_b_pk PRIMARY KEY,
/* Add a column referencing another column in the same table. */
column_c INT NULL
CONSTRAINT column_c_fk
REFERENCES doc_exe(column_a)
go
ALTER TABLE doc_exe
DROP CONSTRAINT column_c_fk
How to recreate CONSTRAINT column_c_fk without droping and reacreating column column_c or add new CONSTRAINT on column column_c ?
Thanks a lot .
Drop Constraint Never Finishes
Oct 13, 2002I need to make some changes to tables in a database. To do this requires that I "alter table" and "drop constraint" All constraints drop properly, except one. The last one will churn away forever in query analyzer and never drop. I am unable to make the necessary changes until this completes. I am guessing that there is a data issue that is keeping the constraint from being dropped. Any ideas on how to proceed? Thanks!
View 2 Replies View RelatedDrop Column With Constraint
Sep 25, 2007
Hello !
I am using Microsoft SQL Server 2000
I am trying to drop a column that has a constraint, executing the script inside a transaction:
BEGIN TRANSACTION
ALTER TABLE MOPTeste DROP CONSTRAINT FK_IDMOPPais
ALTER TABLE MOPTeste DROP COLUMN IDMOPPais
COMMIT
If i dont commit the drop constraint, it wont let me drop the column
Solutions?
Foreign Key As Drop Down Menu
Apr 5, 2006hi all,
I have a table called suppliers where i type my suppliers details.
I have also a table called supp_corellation in which i have the proffesion of my suppliers.
there is one column in the table of suppliers which it takes data from the table supp_corellation . Is it possible to choose the values from a list instead of typing in my table (lets say drop down list)???
Foreign Key Constraint- Reference 1 Of 2 Tables
Nov 2, 2007Hi,
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!
Foreign Key Constraint To A Composite Primary Key
Mar 6, 2008I have two tables: table 1 and table 2. The primary key of table is composite key of two collumns and table 2 is the child of parent table 1. Is it possible to create / define a foreign key constraint using a composite primary key?
View 10 Replies View RelatedColumn Foreign Key Constraint 'EOR_ITE_REF_EOR'
Mar 17, 2004I am importing data from a flat, comma delimited text file. It appears to properly import all the records and then on the last record it give me the error
INSERT statement conflicted with COLUMN FOREIGN KEY constraint for 'EOR_ITE_REF_EOR'.
Then it goes on to tell me the database, table and column in which the problem occured which is the first column in the table. It looks like it doesn't like the end of the file for some reason (EOR, end of record?) so I tried deleting the last record from the file and it still does it. I do have a file that I have imported that worked so I tried copying the last record of that file and pasting it into the last record of the file I wanted but that did not work either. The ends of file that works and the file that doesn't work look the same and I can find nothing on 'EOR_ITE_REF_EOR'. Any help would be appreciated.
Create A Foreign Key To Unique Constraint?
Jul 3, 2015why it is not possible to create a Foreign key to a Unique constraint?
Table A has column 1 holding a Primay key and two columns (2 and 3) holding a Unique combination (and some more columns).He created an Unique constraint on column 2 and 3 together.
He wanted to use this Unique combination to point to table B (instead of the table 1's PK) so he tried to create a foreign key on a column in table B but an error popped up prompting;
The columns in table 'TABLE_A' do not match an existing primary key or UNIQUE constraint.
Ok - these two columns ar no PK but the hold an Unique constraint......
Enforcing Foreign Key Constraint On Tables
Mar 5, 2008Greetings all!
How can I enforce a foreign key constraint when I have two tables each one residing on a different database?
Thanks for your help in advance.
Determining If Foreign Key Constraint Exists
Jul 20, 2005Hello,I'm working with a number of databases. I need a way to determine if aforeign key with given name exists and determine what tables andfields are linked to it. Any ideas?I know I can issue the following statement to get a list of the fieldsthat are constrained by a foreign key constraint.SELECT * FROM INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGEHow can I get a list of fields pointed to by the constraints?Thanks,WillJoin Bytes!
View 1 Replies View RelatedAdding A Column With Foreign Key Constraint
Oct 1, 2007
Hello!
I am trying to alter a table adding a column with foreignkey constraint. The table that holds the primary key in that relation has data, so i am not being able to execute the alter statement.
This is the error:
Server: Msg 547, Level 16, State 1, Line 1
ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK_MOPAeroportoICAO_IDMOPAlimentacaoFerroviaTipo'. The conflict occurred in database 'MOP', table 'MOPAlimentacaoFerroviaTipo', column 'IDMOPAlimentacaoFerroviaTipo'.
This is the script:
ALTER TABLE MOPAeroportoICAO
ADD IDMOPAlimentacaoFerroviaTipo [int] DEFAULT 0 NOT NULL
CONSTRAINT [FK_MOPAeroportoICAO_IDMOPAlimentacaoFerroviaTipo] FOREIGN KEY
REFERENCES MOPAlimentacaoFerroviaTipo (IDMOPAlimentacaoFerroviaTipo)
How can i turn of check when i add the foreign key ?
Thanks in advance
Problem Creating A Foreign Key Constraint
Feb 8, 2007Hello, I'm having some problems trying to create this foreign key constraint:
ALTER TABLE dbo.t2_demaclie
ADD CONSTRAINT FK03_T2_DEMACLIE FOREIGN KEY (dclPerfilCompania, dclOrdenPedido)
REFERENCES DBO.T2_PEDIDOCLIENTE (cdPerfilCompania, nmOrdenPedido)
Server: Msg 547, Level 16, State 1, Line 1
ALTER TABLE statement conflicted with TABLE FOREIGN KEY constraint 'FK03_T2_DEMACLIE'. The conflict occurred in database 'Comfruta_dllo', table 't2_pedidoCliente'.
I'm sure there's no other constraint with the same name, and there's no othe one with the same columns...
Thanks a lot !!
Updating A Table Having A Foreign Key Constraint
Nov 10, 2006Hi
I am trying to update tables "Table A" & " TableB" with a new value for a particular column1. Now "TableA" contains a foreign key "FK1" defined on it and is referencing another table "Table B" containing the similar column "Column1"
Because of this constraint I was not able to update TableA and TableB. My question is
1) If i wanted to go ahead with this update, what are the possible ways?
2) If only solution is to drop the constraint. Then How do i know the definition for this particular Foreign key, i mean it may refer some columns in Table B. I wanted to know the complete definition of it so that i can rebuild the constraint after the update. Right now i can see only the constraint name when i use sp_help TableA. But how do i know the complete reference made by this foreign key.
Early reply is much appreciated
Thanks!
Programatically Finding If A Row Has A Foreign Key Constraint
Jul 11, 2006Hello,
Does anyone know a way from within a .net application to find out if a row has a foreign key constraint before updating it? Or possibly in a SQL Stored Procedure if necessary.
What I am trying to do is basicly simulate a delete of a row in a SQL 2005 database from a .net application. Instead of actually deleting the row I want to set a bool column as deleted. The problem is that I can't orphan records that have a relationship to the one deleted.
This is normaly taken care of automaticly with refrential integrity working properly, but not actually calling delete comands I can't seem to find that out without writing a lot of code to check manually in other tables for that key.
Any help would be appreciated greatly,
Thanks,
Patrick
How To Drop UNIQUE CONSTRAINT On Only One Column
May 5, 2014I am very new to sql and I have got this doubt.
CREATE TABLE employee
{ EMP-ID VARCHAR UNIQUE,
DESIG VARCHAR UNIQUE,
SALARY INT };
Probably this is worst table ever created :).Now How to drop UNIQUE constraint on only column lets DESIG.
if i write
ALTER TABLE employee
DROP CONSTRAINT myuniqueconstraint;
will drop constraints on both columns which I dont want.
Any query that remove UNIQUE CONSTRAINT only on DESIGN column.
and one more clarification,
ALTER TABLE employee
MODIFY SALARY INT NOT NULL;
ALTER TABLE employee
ALTER COLUMN SALARY INT NOT NULL;
which of the above two is right query to add NOT NULL constraint to the above employee TABLE?
Drop Primary Key Constraint Of (#) Hash
Jul 20, 2005Hi there,I have created a hash table. After using it, somehow the primary keyconstraint of this hash table still exist in database. Which causeerror.When I delete this constraint with Alter table Drop con....It gives no table exist error.Can anybody give any idea.Thanks in Adv.,T.S.Negi
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