The opposite end of a 'foreign key' has to be
a 'unique key' or 'primary key'. You have only
two 'nominally correct' options -
a) declare a unique key on table1.col1
or
b) Create a table where the unique values
of table1.col1 are held, and declare a
primary key on it - them make table1
and table2 reference it.
Your question does, of course, suggest that
there may be a flaw in your physical database
structure.
Jonathan Lewis
Host to The Co-Operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
Author of:
Practical Oracle 8i: Building Efficient Databases
See http://www.jlcomp.demon.co.uk/book_rev.html
For latest news of public appearances
See http://www.jlcomp.demon.co.uk
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Use spare CPU to assist in cancer research.
-----Original Message-----
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
Date: 27 August 2001 17:42
|Hi DBAs,
|
|Table1 PK is on columns col1,col2,col3
|I want to create a FK on table2 to table1 for col1.
|
|What is the alternative to
|ALTER TABLE table2
|ADD CONSTRAINT fk_table2
|FOREIGN KEY (col1) REFERENCES table1(col1);
|
|I always get ORA-2270: No matching unique or primary key for this
|column-list.
|Every value for table2.col1 is in the table table1.col1. I want to
enforce
|this at the database server level.
|
|Thanks
|Rick
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