Create a foreign key constraint against a different schema

Similar Questions

• How to create a foreign key constraint on a table nested column

  Dear Experts,
  I create 2 tables using the object type. the VESSEL_PARAM table contains the list of the parameters allowed.
  The table VESSEL_TYPE containe single item we list some parameters.
  
  On this table, I love the column VESSEL_PARAM table VESSEL_PARAM to check if the settings are and the reference value is allowed.
  How to create a foreign key?
  Here my script that generates this runtime error: 00904. 00000 - '% s: invalid identifier' on this line
  
  ALTER TABLE VESSEL_PARAM_TAB ADD CONSTRAINT FK_VESSEL_TYPE FOREIGN KEY (NAME, DATA_VALUE)
  REFERENCES VESSEL_PARAM (PARAM_NAME, LIST_PARAM_VALUE. DATA_VALUE)
  

  CREATE OR REPLACE TYPE OBJ_PARAM_VALUE AS OBJECT 
  ( 
    DATA_VALUE  VARCHAR2(20)
   ,DESCRIPTION VARCHAR2(125)
  ) NOT FINAL;
  /
  
  CREATE OR REPLACE TYPE LIST_PARAM_VALUE AS TABLE OF OBJ_PARAM_VALUE;
  /
  
  -- derive object subtype from object supertype
  CREATE OR REPLACE TYPE OBJ_PARAM_NAME UNDER OBJ_PARAM_VALUE (
    NAME VARCHAR2(30)
  )NOT FINAL;
  /
  
  CREATE OR REPLACE TYPE LIST_PARAM_NAME AS TABLE OF OBJ_PARAM_NAME;
  /
  
  Prompt create table VESSEL_PARAM;
  CREATE TABLE VESSEL_PARAM (
     PARAM_NAME   VARCHAR2(20) NOT NULL
    ,PARAM_DESC   VARCHAR2(125)
    ,PARAM_VALUE  LIST_PARAM_VALUE
    ,CONSTRAINT PK_VESSEL_PARAM PRIMARY KEY (PARAM_NAME)
  ) 
  NESTED TABLE PARAM_VALUE STORE AS PARAM_VALUE_TAB
  TABLESPACE CMS_ADMDATA;
  /
  ALTER TABLE PARAM_VALUE_TAB ADD CONSTRAINT UN_PARAM_VALUE_TAB UNIQUE (DATA_VALUE);
  /
  SHOW ERROR;
  
  Prompt create table CMS_ADM.VESSEL_TYPE;
  CREATE TABLE CMS_ADM.VESSEL_TYPE (
    VESSEL_TYPE  VARCHAR2(20) NOT NULL
   ,VESSEL_DESC  VARCHAR2(125)
   ,VESSEL_PARAM LIST_PARAM_NAME
   ,CONSTRAINT PK_VESSEL_TYPE PRIMARY KEY (VESSEL_TYPE)
  -- ,CONSTRAINT FK_VESSEL_TYPE FOREIGN KEY (VESSEL_PARAM) 
  --        REFERENCES VESSEL_PARAM (PARAM_NAME)
  ) 
  NESTED TABLE VESSEL_PARAM STORE AS VESSEL_PARAM_TAB
  TABLESPACE CMS_ADMDATA;
  /
  ALTER TABLE VESSEL_PARAM_TAB ADD CONSTRAINT UN_VESSEL_PARAM_TAB UNIQUE (NAME);
  ALTER TABLE VESSEL_PARAM_TAB ADD CONSTRAINT FK_VESSEL_TYPE FOREIGN KEY (NAME,DATA_VALUE) 
          REFERENCES VESSEL_PARAM (PARAM_NAME,LIST_PARAM_VALUE.DATA_VALUE)
  /
  SHOW ERROR;

  Thank you
  
  Salvatore

  Could you please indicate your answer as correct if you judge them correct.

  Best regards

  Mohamed Houri

• Add the foreign key refers to a different schema

  Hello

  We have a database with schemaA and schemaB and we use a data model for schemaA with SQL Data Modeler.

  Our data model is based on SchemaA and we do not want add schemaB or create subview in our current model for schemaB since our dev team do not want schemaB in the model

  We have created a synonym in tableB schemaB shcemaA after granting select them, references to schemaA

  We have added a foreign key on tableA in referencing TableB on schemaB schemaA.

  for example. Add ALTER table tableA foreign constraint key(column-name) references tableB(colum-name)

  So far so good.

  But if we try to produce the DDL for tableA it has not provided the ALTAR of the foreign key that is based on shcmeaB

  We know that we cannot add foreign key on dblinks.

  How can I get the Modeler DDL from SQL data for tableA, including the foreign key

  We appreciate the answers

  Kind regards

  Zafar

  Hi zak,.

  We have created a synonym in tableB schemaB shcemaA after granting select them, references to schemaA

  We have added a foreign key on tableA in referencing TableB on schemaB schemaA.

  You can do it in the database because TableB exists in the database and DB knows its definition, including the existing constraint of PK/UK.

  This is the same model of data Modeler - you must have the definition of the table referenced in order to create the FK that refer to the constraint of PK/UK.

  As it works now (we can change it) you can have modeled for SchemaA and ModelB for SchemaB. Then, you can drag & drop tableB form the Navigator to the diagram of the ModelA and TableB there will exist as an object remote read-only, you can use to create the FK.

  With the help of subviews, DDL generation and configurations of reports, you can display the dev team than objects that they want to see - on the charts in generated DDL and reports.

  Philippe

• Can we create a foreign key by using built in functions?

  Hi all

  I'm in the need to create a foreign key referring to an expression of a column in another table.

  For example, I try below and I got some errors.

  CREATE TABLE TABLE_A

  (

  student_id VARCHAR2 (30),

  student_name VARCHAR2 (100),

  CONSTRAINT fk_A FOREIGN KEY (student_id) REFERENCES TABLE_B (UPPER (column_name))

  );

  Please suggest if it is possible that a foreign key could be made in an expression or not?

  2761969 wrote:

  Hi all

  I'm in the need to create a foreign key referring to an expression of a column in another table.

  For example, I try below and I got some errors.

  CREATE TABLE TABLE_A

  (

  student_id VARCHAR2 (30),

  student_name VARCHAR2 (100),

  CONSTRAINT fk_A FOREIGN KEY (student_id) REFERENCES TABLE_B (UPPER (column_name))

  );

  Please suggest if it is possible that a foreign key could be made in an expression or not?

  No - it isn't.

  You can, however, create a VIRTUAL column in the parent table, and then create a foreign key that references.

• Question: Is foreign key references to a different column in the same table

  Hello

  I'm not grasp this concept. Would you be able to provide the logic how and why you need to create a foreign key that references a column of the same table?

  For example, referencing the schema, SupervisorNo @ here is a FOREIGN KEY to the "EmpNo" column in the same table.

  EMPLOYEE (EmpNo, title, Fname, Lname, phone, Email, date of birth, sex, salary, HireDate, OutNo, SupervisorNo @)

  
  

  Why would you want to do this and how can it be used? If you are filling out the data in the table, and this constraint is enabled, you will not be able to load whatever it is because the "EmpNo" column will be empty.

  
  

  Any input you can provide me with this would be greatly appreciated. Thank you!

  
  

  
  

  His name

  Self-referential integrity constraints

  Lets say that we have the table emp with emp_no and mgr_no columns.

  Now all managers should also be an employee too. How can I check this when inserting data into this table? I applied auto integrity constraint. It would help me to make sure no handler (doesn't mean no mgr_no) must be registered if this Manager is not an employee of this organization. Which means, I won't be able to enter any mgr_no in the column until and unless that the same employee also is an employee (emp_no from the same table).

  Check the link as well below.

  Data integrity

  Thank you

  Ishan

• How to associate an index with a foreign key constraint

  I understand how to associate a primary key constraint or a Unique key constraint index...
  Yet I don't see how to associate the index of a foreign key constraint. Is this possible?
  
  Thank you
  Bob Larsen

  Hi Bob,

  In Data Modeler, physical model for Oracle primary and unique keys dialog boxes offer an Index field using, which is used to generate the 'using_index_clause' in the DDL for primary and Unique key constraints.
  However the Oracle Database DDL does not have the "using_index_clause" for Foreign Key constraints, thus Data Modeler does not provide this feature for foreign keys.

  So, you will need to create a separate Index that uses the same columns as the foreign key (using the index page of the table properties dialog box in the relational model).

  David

• create a foreign key

  I'm creating a foreign key between two tables with the following command
  
  
  ALTER TABLE core_business.cb_insured_person ADD)
  CONSTRAINT fk_present_prov_cty_cbi
  FOREIGN KEY (present_province_code, present_city_code)
  General_information.cb_city (province_code, city_code) NOVALIDATE REFERENCES);
  
  
  I have the DBA privilege and I used to do this work, but when I run stated above I give error of insufficient privileges, how can I solve this problem...
  
  
  CREATE THE TABLE CORE_BUSINESS. CB_INSURED_PERSON
  (
  NUMBER OF IP_REGION_FO_CODE (4, 0) NOT NULL
  , IP_CHECK_DIGIT VARCHAR2 (1 BYTE) NOT NULL
  NUMBER OF IP_SERIAL_NO (6, 0) NOT NULL
  NUMBER OF EO_CODE (6: 0)
  NUMBER OF REGISTRATION_CODE (2, 0)
  TITLE VARCHAR2 (5 BYTE)
  , VARCHAR2 (35 BYTE) NAME NOT NULL
  OLD_NIC_NO VARCHAR2 (13 BYTE)
  NEW_NIC_NO VARCHAR2 (15 BYTE)
  VARCHAR2 (6 BYTE) FAMILY_CODE
  SEX VARCHAR2 (1 BYTE)
  RELATIVE_NAME VARCHAR2 (35 BYTE)
  NUMBER OF RELATIONSHIP_CODE (3, 0)
  DATE_OF_BIRTH DATE
  DATE_OF_JOINING_EOBI DATE
  PRESENT_ADDRESS VARCHAR2 (100 BYTE)
  NUMBER OF PRESENT_PROVINCE_CODE (2, 0)
  NUMBER OF PRESENT_CITY_CODE (5, 0)
  NUMBER OF PRESENT_POST_CODE (5, 0)
  PRESENT_TELEPHONE VARCHAR2 (30 BYTE)
  CONSTRAINT PK_CB_INSURED_PERSON PRIMARY KEY
  (
  IP_REGION_FO_CODE
  IP_CHECK_DIGIT
  IP_SERIAL_NO
  )
  ENABLE
  )
  LOGGING
  TABLESPACE "EOBI.
  PCTFREE 10
  INITRANS 1
  STORAGE
  (
  747634688 INITIAL
  MINEXTENTS 1
  MAXEXTENTS 2147483645
  USER_TABLES KEEP
  );
  
  
  CREATE TABLE GENERAL_INFORMATION. CB_CITY
  (
  NUMBER OF PROVINCE_CODE (2, 0) NOT NULL
  NUMBER OF CITY_CODE (5, 0) NOT NULL
  , NAME VARCHAR2 (25 BYTE) NOT NULL
  AREA_CODE VARCHAR2 (6 BYTE)
  VARCHAR2 (1 BYTE) STATUS NOT NULL
  , CREATED_BY VARCHAR2 (10 BYTE) NOT NULL
  CREATED_DATE DATE NOT NULL
  , MODIFIED_BY VARCHAR2 (10 BYTE) NOT NULL
  MODIFIED_DATE DATE NOT NULL
  NUMBER OF DIVISION_CODE (5, 0)
  NUMBER OF DISTRICT_CODE (5, 0)
  CONSTRAINT PK_PRV_CTY PRIMARY KEY
  (
  PROVINCE_CODE
  CITY_CODE
  )
  ENABLE
  )
  LOGGING
  TABLESPACE "EOBI.
  PCTFREE 10
  INITRANS 1
  STORAGE
  (
  81920 INITIAL
  MINEXTENTS 1
  MAXEXTENTS 2147483645
  DEFAULT USER_TABLES
  );
  
  
  CREATE A UNIQUE GENERAL_INFORMATION INDEX. CB_CITY_PK ON GENERAL_INFORMATION. CB_CITY (NAME ASC)
  LOGGING
  TABLESPACE "EOBI_IDX".
  PCTFREE 10
  INITRANS 2
  STORAGE
  (
  65536 INITIAL
  MINEXTENTS 1
  MAXEXTENTS 2147483645
  DEFAULT USER_TABLES
  );
  
  CREATE A UNIQUE GENERAL_INFORMATION INDEX. CB_CITY_UK ON GENERAL_INFORMATION. CB_CITY (CSA, CSA CITY_CODE PROVINCE_CODE)
  LOGGING
  TABLESPACE "EOBI_IDX".
  PCTFREE 10
  INITRANS 2
  STORAGE
  (
  65536 INITIAL
  MINEXTENTS 1
  MAXEXTENTS 2147483645
  DEFAULT USER_TABLES
  );

  The schema CORE_BUSINESS has REFERENCES and privileges SELECT on the table that you want to refer to the foreign key constraint?

• Entity Association depends on foreign key constraint?

  Hello
  
  I use JDeveloper 10.1.3.4 and have a question, as shown in the subject of this announcement. By a design flaw, I added a foreign key on a table constraint at the level of the database for any purpose other than to achieve a relationship between master/detail your. Now the foreign key constraint fell to remedy the irregularity, but I don't know if the application is not a problem on the road.
  
  The application in question has a table named BILL and another table called VALIDATIONS, both with the same primary key composite (LDAP_UID, TERM), where we hear per semester.
  
  BILL is on students, the balance they have, etc. VALIDATION records the commitment, students make:
  

  BILL
  ------------------------------------------------
  LDAP_UID       TERM      BALANCE
  -------------  --------  --------
  john.miller    200902       1500
  
  
  VALIDATIONS
  ------------------------------------------------
  LDAP_UID       TERM      CONFIRM_NUMBER
  -------------  --------  --------------
  john.miller    200902    0901100005

  The foreign key constraint has been added on the table of VALIDATION, validations (LDAP_UID, TERM) reference (LDAP_UID, TERM) BILL. When the data model is accumulated in the application, an entity association was created automatically for this foreign key constraint, and then a link has been created on the association of the entity to achieve the effect mater-detail of the application:
  

  Table:               BILL
  Table:               VALIDATIONS
  Foreign Key:         VALIDATIONS(LDAP_UID, TERM) references BILL(LDAP_UID, TERM)
  Entity object:       Bill
  Entity object:       Vallidations
  Entity Association:  ValidationsBillFkAssoc (based on the foreign key)
  View object:         LoggedInStudent (from Bill)
  View object:         OneValidation (from Validations)
  View link:           ValidationByOneStudent (based on ValidationsBillFkAssoc.  This achieves master/detail
                                               between LoggedInStudent and OneValidation)

  This foreign key is now asking problem and should be deleted: Bill table contains the data from more than three semesters, whereas student commitments cumulatively saved in the table of VALIDATIONS must be maintained permanently. When data from older semesters are unloaded from the table of BILL, the lines stored in the table of VALIDATION are orphaned.
  
  I thought that the link of the view and the association of the entity dependent on the foreign key, so I removed before dropping the foreign key in the order listed here:
  

  Removed usage of of the VO (OneValidation) from the application module
  Deleted the view link (ValidationByOneStudent)
  Deleted the entity association (ValidationsBillFkAssoc)
  Dropped the foreign key in the database

  The master/detail relationship between the two your is still necessary. I added the link display, which now is based on common attributes (LdapUid, term) between the two, rather than based on the association of the entity. The modified application works very well with the database has changed and now the rows in the table of VALIDATION will not be an orphan.
  
  What is interesting and also troubling is that when I run a copy of the application which has been registered before these amendments, on the basis of data which dropped the foreign key constraint, the application still works, with the master-detail and everything. And the dependencies do not seem to matter. But isn't it?
  
  My question is: an entity association requires a corresponding foreign key in the database? If I use the copy of the application before the changes, it will be OK or it will cause unforeseen problems on the road?
  
  Thank you!
  
  Newman
  
  Edited by: J. Newman, October 6, 2009 10:31

  Hello

  If you've proven yourself that in fact there is no dependency between the association and the foreign key constraint. in fact you can create everything that (the primary keys, foreign keys, other constraints) only for your same features if you have nothing
  defined in database tables, which is obviously not right approach. and JDeveloper tells you only about the dependence of its use (if you want to delete something that is used some part... e. g VL in AM, EO in VO, VO in AM...)
  just to note - it is important to synchronize your OA if you change the definition of the data table. for example if you remove the foreign key of the table then right-click on EO and chose to sync - JDeveloper should acknowledge and ask you
  If you want to remove this constraint of EO.

  Kind regards

  Branislav

• SQL statement error INSERT The conflicted with the FOREIGN KEY constraint

  I recently installed a reporting for vmware vsphere software, but I get a SQL error. I opened a request for assistance with vmware, but so far they have not come up with a solution. The error is caused by: com.microsoft.sqlserver.jdbc.SQLServerException: instruction INSERT The conflicted with the FOREIGN KEY constraint 'FK_CB_VSM_NETWORK_VC_ID '. The conflict occurred in database 'VCChargebackVCC02', table "dbo." " CB_VSM_SERVER', column 'VC_ID '. I don't know a lot about SQL, so I'm lost in the extent of troubleshooting is concerned. If anyone has any ideas I'd love to hear them.

  SQL questions are better posed on Technet.  They are better equipped to manage the

  http://social.technet.Microsoft.com/forums/en-us/categories/

• Foreign key constraint, not recognized during the synchronization of data with the model dictionary

  Hello

  Data Modeler is a foreign key constraints do not recognize when synchronizing data with the model dictionary, although the foreign key is there (in the database that a data dictionary is read). I can't find any criterion when a foreign key is not recognized by the Data Modeler. Are there limits to the length of the attribute, or the number of columns in a foreign key, or other limitations which may lead to this behavior not to recognize a fk by Data Modeler? I have columns more than 32 characters. I compared with the fk is recognized by DM, but I can't find anything that indicates why it is not recognized.

  I wonder if someone also has constraints of foreign keys that are not recognized in the comparison of data bases and model?

  Thank you

  Robert

  Hi Robert,.

  Thanks for the comments, I logged a bug.

  Philippe

• in the setup of freshclient and datadownload foreign key constraint

  Hello
  
  I use oracle database 10 GB lite R3 and oracle database 10g R2 as the database back end for her. When I do the client installation fees and datadownload of the client machine I don't get the foreign key constraint in the machune of customer. can someone explain to me the reason for this?
  
  Published by: 793097 on November 9, 2010 21:57

  The Mobile Server deploy foreign keys out of the box. You will need to add them through scripting. You can add scripts in the MDW or API.

  Let me know if you need an example.

• Details of the foreign key constraints

  Why foreign key constraints is not ongoing validation in case of null values?
  For example, in the table EMP and DEPT table, EMP. References DEPTNO Dept. DEPTNO.
  But I am able to insert rows into the EMP table that contains nulls for EMP. DEPTNO.

  Prasath N wrote:
  Why foreign key constraints is not ongoing validation in case of null values?
  For example, in the table EMP and DEPT table, EMP. References DEPTNO Dept. DEPTNO.
  But I am able to insert rows into the EMP table that contains nulls for EMP. DEPTNO.

  I guess he's saying essentially that a foreign key must have a parent key or can be an orphan. But may not be a key that is not listed in the parent.

  And also NULL is neither equal to anything, nor does not correspond to something.

  But still, you can put a NOT NULL constraint if you do not want your foreign key to contain orphaned records.

• Is this a BUG?  Export of data besides the foreign key constraints

  I use SQL Developer 1.5.4 with patches installed 59,47 and 59,59. I want to do an export of database from a scheme of 10 g XE and include all objects in the DOF resulting. So I select ALL the checkboxes in the Export Wizard and when I get to step 3 to specify the objects, I don't see any of my constraints in the list box... not foreign key constraints, without constraints of primary key, without check constraints, nothing. Is this a bug, or is there a workaround, or which could possibly hurt? We want to be able to use the database export function to easily transport and track the changes to our entire schema using source control compares.
  
  Any help or suggestions replacement would be apprieciated.
  
  Thank you
  Matt

  Bug 8679318 follows this question

• Maker of SQL data - how to create the foreign key in the relationship 1 to 1?

  Hi guys...
  
  I had 2 tables...
  
  Table 1 - CFR
  -----------------------
  CFR_ID = primary key
  
  
  Table 2 - USER_PLAN
  ----------------------------
  User_id = primary key
  PLAN_ID ARGUMENT,
  CFR_ID = reference foreign key (table 1)
  
  
  Business flow go like this...
  table insdie CFR, it contains all the documents / transactions of a particular plan user. each time a new transaction occurs for a plan/user, a new CFR_ID / row will be generated.
  After that, the newly generated for the new line, CFR_ID will be updated to the CFR_ID in USER_PLAN
  
  
  Thus, there is always a 1 to 1 relationship between table 2, no matter how much CFR_ID is generated for a particular USER_PLAN. as the CFR_ID in the USEr_plan table will always be the last being produced within the table of the CFR.
  
  
  However, in the Data Modeler, I am unable to create this foreign key relationship... NO idea how create a 1 on 1 relationship of foreign key? or there is no way...
  
  
  Thank you and best regards,
  Noob

  Hey Noob,

  Yes, that's correct.

  Best regards
  Philippe

• type a materialized view foreign key constraint?

  Hello.
  
  I have a materialized view that flows into a single column 'A' two different columns of different tables of a remote database.
  
  I also have a table that has a column 'B', whose values must exist in the column 'A' of the materialized view.
  
  So it's like defining a constraint foreign key of a table to a view, but this is not possible.
  
  Is it possible to do?
  
  I saw some triggers that verify the existence of the 'A' value before insertion in 'B', but this fails when a value is changed or deleted in 'A'
  
  Any suggestions?
  
  Thank you very much.
  
  Published by: user7029403 on 18-ene-2013 03:57

  There is no problem of definition of a primary key on a materialized view and then reference it with a foreign key. It works for me:

  create database link l1 connect to scott identified by tiger using 'orcl';
  create materialized view mv1 as select deptno||dname as a from dept@l1;
  alter table mv1 add constraint mv1pk primary key (a);
  alter table dept add (fkcol as (deptno||dname));
  alter table dept add constraint deptfk foreign key (fkcol) references mv1;
  

  I don't know there is a more elegant solution than to use a virtual column, which seemed the best way to get around the concatenation of two columns in a single