Hi how Can I Add A Foreign key that references a table that
has composit primary key ?
example i had costumer table that has C_Id and SSN Both as
PK and another table has C_Id that must refernece C_Id in
Customers i done the usual way and got oracle error message
about uniqeness any ideas plz
Answers were Sorted based on User's Feedback
Answer / manish yadav
Problem:I think you are challenging the concept of foriegn
key here, a forign key should be unique or primary key in
the refrenced table,C_ID in your case is part of composite
key i.e. its not primary key itself and nither unique key.
Solution:In customer table you may not want to change
primary key but if possible add unique constraint on C_ID
column. It should work
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / mrs.priya
try to separate the composite key using str function when
referencing in another function to get only C_ID
Is This Answer Correct ? | 0 Yes | 0 No |
what is Materialized view? What is a snapshot? what are the similarities and differences between Materialized views and snapshots?
What is the difference between Sleep and Wait? (Java)
What is a read write transaction in oracle?
what is primary key and foreign key when and where have to use
create one table to capture an employee details with a primary key.
Please explain the difference between outer join and inner join? With examples would be appreciable..!
What are the tools for Oracle ?
Hi Can any one tell me what are the API's used in requisition import.
What is a trigger and what are its types?
How to delete multiple rows from a table in oracle?
What are the differences between char and nchar in oracle?
Define the terms primary key foreign key and also the difference between primary and the unique key