Primary key and foreign key

Hi all

I'm confused. If I create a primary key of table constraints, it willl create a unique index by default. If I create a foreign key, it also creates an index? of any kind?

Thank you very much

Kinz

Laughing out loud. foreign key does not have a unique index on the table.

Tags: Database

Similar Questions

Recreation of primary keys?

One of our databases was supposed to be one clone of another, but I think that it was created with a bunch of 'create a table in select' statements, if none of the primary, unique and foreign key constraints fell.
Now I am interrogating the original (source) database for the SQL code that would recreate these constraints. For now, I'm just interested in primary keys.
My SQL is not the height, however. So far, I created this:
Select "alter table myuser." | c.table_name |' add the constraint ('| c.constraint_name |') primary key ('|) CC.column_name
of dba_cons_columns cc,.
c dba_constraints
where c.owner = cc.owner
and c.constraint_name = cc.constraint_name
and c.owner = 'MYUSER'
and c.constraint_type = 'P';

Who does not treat well multi-column primary keys, of course. I get results like:
ALTER table myuser. AFC_TRANSACTION_BATCH add the primary key of the constraint (PK_AFC_TRANSACTION_BATCH) (BATCH_ID
ALTER table myuser. AFC_TRANSACTION_BATCH add the primary key of the constraint (PK_AFC_TRANSACTION_BATCH) (ACQUIRER_ID
Someone has the code to generate a properly formatted 'add constraint' statement that can cope with the single - and multi - multi-column keys correctly? Because I'm going to need a list separated by commas of the column names, I have a feeling that the pipeline functions will make an appearance any time now :-) wrecked all tips/pointers would be appreciated.

How about something like this:

ORCL > select "select dbms_metadata.get_ddl ("CONSTRAINT"," ' |) " constraint_name | " (', "SCOTT") twice; »

2 from dba_constraints where owner = 'SCOTT ';

' SELECTDBMS_METADATA. GET_DDL ("CONSTRAINT", "' |) CONSTRAINT_NAME | " (', "SCOTT") FROMDUAL;'

----------------------------------------------------------------------------------------------------------------

Select dbms_metadata.get_ddl ('CONSTRAINT', 'FK_DEPTNO', 'SCOTT') of double;

Select dbms_metadata.get_ddl ('CONSTRAINT', 'PK_DEPT', 'SCOTT') of double;

Select dbms_metadata.get_ddl ('CONSTRAINT', 'PK_EMP', 'SCOTT') of double;

ORCL >

Post edited by: JohnWatson

I should have mentioned, you need to SET LONG 10000 until you won't miss the generated instructions.

How to join two tables to retrieve the data from the columns in table two. Tables have primary and foreign key relationships

Hello
I want to join the two tables to retrieve the data from the columns of the two table passing parameters to the join query. Tables have primary and foreign key relationships
Details of the table
Alert-1 - AlertCode (FK), AlerID (PK)
2 AlertCode-AlertDefinition-(PK)
Help, please

----------

Hi Vincent,.

I think that you have not worked on adf 12.1.3. In adf 12.1.3 you don't have to explicitly create the association. When you create the EO to your table, Association xxxxFkAssoc, will be created by ADF12.1.3 for you automatically. Please try this and do not answer anything... You can also follow the links below. I solved the problem by using the following link

Oracle ADF Guide step by step - Oracle ADF tutorial: creating a relationship of the master / detail using Oracle ADF

---

Primary key and foreign key between the different schemas

Hi all;
SCOTT user have a 'rank' of table-> it contains the primary key-> users tablespace
The U1 user have a 'emp' table-> it contains the foreign key-> test tablespace
U1 > select constraint_name, constraint_type, r_owner, owner, r_constraint_name of all_constraints where table_name = 'EMP ';
OWNER CONSTRAINT_NAME C R_OWNER R_CONSTRAINT_NAME
------------ ------------------------------ - -------------------------- ----------------------- -----------------------------------------------------
U1 EMP_EMPLEV_C12_FK R SCOTT GRADE_GRL_C1_PK
If I have connection U1, no possibility to find the name of the primary key without connection scott table?
Thank you

Hello

So, you want to know what picture of the SCOTT schema has the constraint that is named "GRADE_GRL_C1_PK." Isn't it?

If so,.

SELECT table_name

Of all_constraints

Owner WHERE = 'SCOTT '.

AND the argument constraint_name = 'GRADE_GRL_C1_PK. '

;

Creation of primary keys, foreign keys and indexes

Hello

I created 60 new tables based on 60 existing tables.

The 60 current tables are named FY11_ACC1, FY11_ACC2, FY11_SALES1, FY11_SALES2..., but all of the 60 tables start with FY11. I created the same structured tables but with names like FY12_ACC1, FY12_ACC2, FY12_SALES1, FY12_SALES2 FY12...

I used the below SQL and generated SQL code.

Select 'create table ' | Replace (table_name, 11, 12).
' in select * from '. table_name | "where 1 = 0'.
from user_tables;

But this did not generate the PRIMARY KEYS, FOREIGN KEYS and INDEXES. How can I automatically or with similar like SQL above? _

Thanks for your time and your help.

How can I create primary keys, foreign keys and indexes for all

ssk1974 wrote:
Can you please provide me with more information or examples.

Something like:

SET SERVEROUTPUT ON FORMAT WORD
DECLARE
    h   NUMBER;
    th  NUMBER;
    ddl CLOB;
BEGIN
    h := DBMS_METADATA.OPEN('TABLE_EXPORT');
    DBMS_METADATA.SET_FILTER(h,'SCHEMA','SCOTT');
    DBMS_METADATA.SET_FILTER(h,'NAME','DEPT');
    DBMS_METADATA.SET_FILTER(h,'EXCLUDE_PATH_EXPR','=''TABLE_DATA''');
    DBMS_METADATA.SET_FILTER(h,'EXCLUDE_PATH_EXPR','=''STATISTICS''');
    th := DBMS_METADATA.ADD_TRANSFORM(h,'DDL');
    DBMS_METADATA.SET_TRANSFORM_PARAM(th,'PRETTY',false);
    DBMS_METADATA.SET_TRANSFORM_PARAM(th,'SQLTERMINATOR',true);
    LOOP
      ddl := DBMS_METADATA.FETCH_CLOB(h);
      EXIT WHEN DDL IS NULL;
      DBMS_OUTPUT.PUT_LINE (ddl);
    END LOOP;
    DBMS_METADATA.CLOSE(h);
END;
/

  CREATE TABLE "SCOTT"."DEPT" ("DEPTNO" NUMBER(2,0), "DNAME" VARCHAR2(14),
"LOC" VARCHAR2(13),  CONSTRAINT "PK_DEPT" PRIMARY KEY ("DEPTNO") USING INDEX
PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS  STORAGE(INITIAL 65536
NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1
FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE
DEFAULT) TABLESPACE "USERS"  ENABLE) SEGMENT CREATION IMMEDIATE PCTFREE 10
PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE(INITIAL 65536 NEXT
1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST
GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
TABLESPACE "USERS" ;

  CREATE UNIQUE INDEX "SCOTT"."PK_DEPT" ON "SCOTT"."DEPT" ("DEPTNO") PCTFREE 10
INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS  STORAGE(INITIAL 65536 NEXT 1048576
MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) TABLESPACE
"USERS" ;

  ALTER TABLE "SCOTT"."DEPT" ADD CONSTRAINT "PK_DEPT" PRIMARY KEY ("DEPTNO")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE
DEFAULT CELL_FLASH_CACHE DEFAULT) TABLESPACE "USERS"  ENABLE;

PL/SQL procedure successfully completed.

SQL>

SY.

Published by: Solomon Yakobson January 5, 2012 16:22

Problem with the migration of key primary and foreign from SQL Server to Oracle
Hi people, I use SQL Developer to migrate Oracle to a SQL database, and I'm stuck with a few questions:

So far, the worst of them is the fact that I can not migrate the PKs and FKs. After having successfully captured the model DB in SQL Server and Oracle conversion, when the tool generates scripts, all ALTER TABLE queries that add pharmacokinetics and the FKs have their columns duplicate targets.

for example: when I'm trying to migrate a simple table that contains an Id (PK) and the columns name, the tool generates the following scripts:

PROMPT create Table TestTable...
CREATE TABLE TestTable)
ID NUMBER (10,0) NOT NULL,
Name VARCHAR2 NOT NULL
);

The PROMPT create constraint primary key on the table TestTable PK_TestTable...
ALTER TABLE TestTable
ADD CONSTRAINT PK_TestTable PRIMARY KEY
(
ID,
ID
)
ENABLE

Regarding the FKs, the tool duplicates the columns thus:

ALTER TABLE SomeTable
ADD CONSTRAINT FK_SomeTable_SomeTable2 FOREIGN KEY
(
SomeTable2Id,
SomeTable2Id
)
REFERENCES SomeTable2
(
ID,
ID
)
ENABLE
;

Does anyone have an idea on how to solve these problems? I would be very grateful for answers!
Hi Fernando,

I was unable to reproduce this problem. My primary / foreign keys when defined using unique columns.

The PROMPT create constraint primary key on the suppliers table PK_Suppliers...
ALTER TABLE suppliers
ADD CONSTRAINT PK_Suppliers PRIMARY KEY
(
Vendor No.
)
ENABLE
;

I tried a few things like
capturing twice and rename the two models of the same
Rename the converted templates
but without success.
I think that this problem occurs is in the capture phase or convert.

(1) you perform the capture online or offline?
(2) can provide you a DDL together for one of these tables and the indexes to see if I can reproduce?
(3) made of capture or convert fail or be again at any stage?

I all else fails I would attempt a capture and convert again using a new repository (create a new schema in Oracle and associate him the migration repository).

Kind regards
Dermot
SQL development team

Published by: Dermot ONeill on October 22, 2009 12:18

Key Reg primary and foreign at the same table
Hello

It is - ok if create primary and foreign keys on the same table itself?

For example:

In a table X, I have two columns such as Codeunite and ParentUnitcode.
Is it ok if create Mt10 as principal and ParentUnitcode as foreign keys in the table itself?

The foreign key base table: OrganizationalUnit
Foreign key columns: ParentUnitCode
Primary/Unique key base: OrganizationalUnit
Primary/unique key col: Mt10

Can anyone answer me on that?

Concerning
Rajesh
OWB,

If the two tables are favouring a one-to-one relationship so there no need to have two separate tables and so you can have free referential foreign keys in the same table where the primary key.

How to set the condition of rule to check the Primary Key, Foreign Key and Unique
I use Oracle 10.2
Could someone tell me please how to set the rule condition to check the primary key, foreign key constraint of uniqueness?
Hello

Primary key, unique constraints and foreign key are better applied using the native functionality of database constraint. If you like the rules to check if a key exists at the time of the evaluation, you can use a function defined by the user in a rule condition and this function can ask to turn the table keys.

Hope this helps,
-Aravind.

How can I make sure that changes in a primary key (in the parent table) would also appear directly in the FOREIGN KEY in the child table?

Forgive my question. I am very new to Oracle.
How can I make sure that changes in the key primary supplier_id (concerning the supplier table) would also appear directly in the FOREIGN KEY (supplier_id) in the products table?
Is that not all the primary key and FOREIGN KEY on?
My paintings:
I created 2 tables and connect to apply in the data base referential integrity, as I learned.
CREATE TABLE - parent provider
(the numeric (10) of supplier_id not null,)
supplier_name varchar2 (50) not null,
Contact_Name varchar2 (50).
CONSTRAINT supplier_pk PRIMARY KEY (supplier_id)
);
CREATE TABLE - child products
(the numeric (10) of product_id not null,)
supplier_id numeric (10) not null,
CONSTRAINT fk_supplier
FOREIGN KEY (supplier_id)
REFERENCES beg (supplier_id)
);
I inserted the following text:
INSERT INTO provider
(supplier_id, supplier_name, contact_name)
VALUES
(5000, 'Apple', 'first name');
I expect that the supplier_id (5000) to the provider of the table also appears in the products table under key supplier_id having the same value which is 5000. But this does not happen.
How to get there?
Thanks in advance!

Hello

What is a foreign key in Oracle?

A foreign key is a way to ensure referential integrity in your Oracle database. A foreign key means that the values of a table must appear also in another table.

Ok!??

What is now the right way to implement referential integrity in your Oracle database that the values of a table must also be included in another table?

A foreign key referential integrity indeed enfore in ensuring that the value in the child table must have a corresponding parent key (otherwise you will encounter an error, as evidenced by "SomeoneElse"). However, it will never automatically insert a row in the other table.

If you are looking for a solution that automatically inserts a record in the other table, maybe you should go for triggers:

See:
- http://docs.Oracle.com/CD/B28359_01/AppDev.111/b28370/triggers.htm#BABCIBBJ
- Oracle: Help after HAVING INSERT and AFTER UPDATE triggers

index and foreign key

I just read an article on the index.
Jonathan Lewis - during indexing
The author says that if you update the primary key or a unique key at the end of 'parent' of the referential integrity constraint Oracle locks the "child" table to find the rows of children committed and uncommitted if a suitable index does not exist. After that he says do not create indexes 'foreign key '. I mean, there is a contradiction. What do you think?

delete this thread!

manually assign primary key and copy to the detailed form

Hi experts,
Oracle Apex 4.2, 11g database, using windows 7.
I created a form and created automatic product no. (not only sequence) with logic and SQL. SQL query produced good wise exercise, and exercise begin from 01 July and ends 30 June each year. This means if the 07/01/2015 start it will create a new voucher No.
The main Table name is GL_PV and the columns are:
Number of PV_No
Date of PV_Date
Number of CC_code
number amount
Remarks varchar2 (100)
Created a process to submit before the calculations and validations.
The codes are
NVL SELECT (MAX (to_number (nvl(pv_no,0))) + 1, 1) AMENDMENTS
IN: P15_pv_no
OF GL_PV
WHERE pv_date
BETWEEN to_date (' 01-07-' |) (extract (year from to_date (: P15_pv_date, "dd-mm-yyyy")))
+ case when extracted (month of to_date (: P15_pv_date, "dd-mm-yyyy")) < = end of another 0, then 6-1), "dd-mm-yyyy")
AND to_date (30 - 06-' |) (extract (year from to_date (: P15_pv_date, "dd-mm-yyyy")))
(+ case when extracted (month of to_date (: P15_pv_date, "dd-mm-yyyy")) < = 6 then 0 otherwise 1 end), "dd-mm-yyyy")
and cc_code =: P15_cc_code;
and press the button when Conditions = Generate_Button
In the form of master I put the data and click on create button is working well and generating good can result.
Now that I've created a detail of my detail table is pv_detail and the columns are
pv_voucher_no
pv_date
account_code
Remarks
amount
I want to create the relationship of the master / detail form.
I tried:
- primary key and foreign key, but does not. column GL_PV table primary key (PV_NO, PV_DATE), PV_DETAIL (pv_voucher_no, pv_date) foreign key table columns: -.
- has created one for master and 2nd 2 form for details, good master shape generates but not detail of.
I want to assign pv_no, pv_date in both value table (master / detail), in other words copy value pv_no and pv_date of main table in detail table pv_voucher_no and pv_date.
Please advise how I can solve this problem.

Thank you forum oracle to solve my problems.

error report: ORA-01790: expression must have the same type of data, matching expression

Find the solution on this forum

Solution:

Attributes and the tabular form:

Change the default type = PL/SQL Expression on the function

Default = to_date(:P15_PV_DATE,'DD-MON-YYYY')

ORA-02266: permit to unique/primary keys in table referenced by foreign keys
Hello
I'm trying to delete data from a table by dropping a partition. I've identified all the child tables by running the following command.

Select "select count (*) from ' |" table_name |' where employee_id = 100; »
of dba_constraints
where constraint_type = 'R '.
and r_constraint_name in
(select constraint_name from dba_constraints
where constraint_type in ('P', 'U') and table_name =' EMPLOYEE);

"SELECTCOUNT (*) OF | TABLE_NAME | "WHEREEMPLOYEE_ID_ID = 100; »
-----------------------------------------------------------------------------------------------
Select count (*) in the PT_ORDERS where employee_id = 100;
Select count (*) in the PT_DEP where employee_id = 100;
Select count (*) in the PT_SKILLSET where employee_id = 100;

I dropped the score for number 100 in all child tables. The count (*) select returns 0 rows for each of the foregoing.

When I try to run the command on the EMPLOYEE table, below I get ' ORA-02266: unique/primary keys in table referenced by foreign keys enabled.

Drop partition ALTER table EMPLOYEE EMP_ID_100;

I don't see why I am unable to give up this partition now because it is data child present in any of the referenced tables. Any suggestions or help on this would be greatly appreciated.

Thank you.

RGS,
Rob
You must first disable foreign key constraints and delete the partition. Deletion of lines or a fall in childs partitions do not work in this case
as you have the overall dependence:
```
SQL > create table scott.t (x int primary key, int y)

2 partition by (list (y)

3 values p_1 (1) partition, partition values p_2 (2))

4.
Table created.
SQL > create table scott.t_c (x int references scott.t (x), int y)

2 partition by (list (y)

3 values p_1 (1) partition, partition values p_2 (2))

4.
Table created.
SQL > insert into scott.t values (1,1)

3 N
1 line of creation.
SQL > insert into scott.t values (2,2)

3 N
1 line of creation.
SQL > insert into scott.t_c values (1,1)

3 N
1 line of creation.
SQL > insert into scott.t_c values (2,2)

3 N
1 line of creation.
SQL > commit;
Validation complete.
SQL > alter table scott.t_c drop partition p_2.
Modified table.
SQL > alter table scott.t drop partition p_2.

ALTER table drop partition p_2 scott.t

*

ERROR on line 1:

ORA-02266: permit to unique/primary keys in table referenced by foreign keys
SQL > select constraint_name from dba_constraints

2 where owner = 'SCOTT' and constraint_type = 'P '.

3 and table_name = 't';
CONSTRAINT_NAME

------------------------------

SYS_C0011058
SQL > select constraint_name from dba_constraints

2 where owner = 'SCOTT' and constraint_type = 'R '.

3 and r_constraint_name = "SYS_C0011058";
CONSTRAINT_NAME

------------------------------

SYS_C0011059
SQL > alter the constraint to disable scott.t_c table SYS_C0011059;
Modified table.
SQL > alter table scott.t drop partition p_2.
Modified table.
SQL > alter table scott.t_c enable novalidate constraint SYS_C0011059;
Modified table.
```
I guess you should consider options such as partitioning Referencial (with some restrictions).

Best wishes
Dmitry.

Key foreign primary key
Dear all,

I have 30 paintings. of which some tables with primary key and the foreign key relationship.

How can I find which table is to have a primary and key to the primary key column, what table is a foreign key for all tables.

Saludos.
```
select a.table_name as parent_table, b.table_name as child_table from user_constraints a,user_constraints b where a.constraint_type='P'
and b.constraint_type='R'
and a.constraint_name = b.r_constraint_name
```

Difference between the immediate and normal constraint primary key value

Hello
I tried the following to understand the difference between immediate constraint set and the primary normal stress

create table cust (cust_id number ,cust_name varchar2(25));

alter table cust add constraint cust_id_pk primary key(cust_id)
deferrable initially deferred;

SQL> insert into cust values(1,'raj');

1 row created.

SQL> insert into cust values(1,'sam');

1 row created.

SQL> commit;
commit
*
ERROR at line 1:
ORA-02091: transaction rolled back
ORA-00001: unique constraint (SCOTT.CUST_ID_PK) violated


SQL> set constraint cust_id_pk immediate;

Constraint set.

SQL> 
SQL> insert into cust values(1,'lata');

1 row created.

SQL> insert into cust values(1,'lata');
insert into cust values(1,'lata')
*
ERROR at line 1:
ORA-00001: unique constraint (SCOTT.CUST_ID_PK) violated

The above error violation even works for a normal constraints primary / unique

So what is the use of the command

immediate Set constraint cust_id_pk;

Thank you

So what is the use of the command

In fact, the use of the command when you're dealing with foreign key constraints. As explained below

 SQL>  create table cust (cust_id number ,cust_name varchar2(25), supplier_id number);

Table created.

SQL> create table supp(supplier_id number);

Table created.

SQL> alter table supp add primary key(supplier_id);

Table altered.

SQL>  ALTER TABLE cust ADD CONSTRAINT fk_cust_supp
  2    FOREIGN KEY (supplier_id)
  3    REFERENCES supp (supplier_id)
  4    DEFERRABLE
  5    INITIALLY deferred;

Table altered.

To insert a line in the cust table without entering Ref provider table supp

SQL> insert into cust values(1,'raj',111);

1 row created.

Line by 1 created successfully (attention this validation is not yet done) because the foreign key constraint is initially deferred.

Now

SQL> set constraint fk_cust_supp immediate;
set constraint fk_cust_supp immediate
*
ERROR at line 1:
ORA-02291: integrity constraint (OWNER.FK_CUST_SUPP) violated - parent key not found

Since Ref no outs in extra table so forced provider violated.

allows to insert a row in the vendor corresponding with the vendor id in the cust table id

SQL> insert into supp values(111);

1 row created.

Now, try

SQL> set constraint fk_cust_supp immediate;

Constraint set.

but now, if you try to insert a row into the table cust without this vendor id in table supp, it give error (since now forced to check from the inserted row, even will not wait for commit)

SQL>  insert into cust values(3,'bob',222);
 insert into cust values(3,'bob',222)
*
ERROR at line 1:
ORA-02291: integrity constraint (OWNER.FK_CUST_SUPP) violated - parent key not found

Also, in the case of primary key constraints will be checked when you perform VALIDATION, otherwise that it will allow you to insert the second row.

SQL> alter table cust add constraint cust_id_pk primary key(cust_id)
  2  deferrable initially deferred;

Table altered.

SQL> insert into cust values(1,'raj');

1 row created.

SQL> insert into cust values(1,'sam');

1 row created.

SQL> insert into cust values(1,'bob');

1 row created.

SQL> commit;
commit
*
ERROR at line 1:
ORA-02091: transaction rolled back
ORA-00001: unique constraint (OWNER.CUST_ID_PK) violated

SQL>

SQL> drop table cust;

Table dropped.

SQL> create table cust (cust_id number ,cust_name varchar2(25));

Table created.

SQL> alter table cust add constraint cust_id_pk primary key(cust_id)
  2  deferrable initially deferred;

Table altered.

SQL> set constraint cust_id_pk immediate;

Constraint set.

SQL> insert into cust values(1,'raj');

1 row created.

SQL>  insert into cust values(1,'sam');
 insert into cust values(1,'sam')
*
ERROR at line 1:
ORA-00001: unique constraint (OWNER.CUST_ID_PK) violated

SQL>

Published by: Azhar Husain on July 27, 2011 12:01

Problem with the primary key and indexes
Hi all

I'm looking a mess on one of our main tables.
One of the developers here added an index on 3 columns in the table, thinking that it would speed up (not noticing that it had not a PK).

Subsequently another developer has noticed there do not have a primary on key. So they added a touch of primry on the single column.

The problem is that now the index created on 3 columns is bein used as the primary key index. As when the primary key is created a new index was not created.

Is there anyway to get rid of this index/change it correct?

This table is related to many many other tables, so when we tried to remove the index we could not due to the primary key and foreign key violations with other tables.

Thanks in advance
Oracle, as you found, is quite capable to use a column enformce multi index a single column primary key, as long as the pk column is the leader in the index. This should not cause performance issues for a search of PK and if the three indexed columns are often selected only may benefit from these types of queries.

The only way to change that now, would be to drop all CF, drop and add the PK constraint and then add all the FK constraints. A long time and potentially dangerous (if you miss to add back of the FKs) endeavour. Certainly not worth the risk in my opinion.

John

Primary key and foreign key

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