Oracle 9i primary and foreign key constraint

Question

I had created table in the following way
create table dept(deptno number,dname varchar2(20));
create table emp(empno number primary key,ename varchar2(25), deptno number references dept(deptno));
One can get constraint name and constraint type from user_constraints table. But I want to know name of the column of table from which column is used as foreign key in another table. How to get such information?

Answer 1

SQL> Select *From user_cons_columns  A
  2   Where Constraint_Name In (Select r_Constraint_Name
  3                           From User_Constraints B
  4        Where Table_Name='EMP'
  5          And Constraint_Type='R'
  6          Group By r_Constraint_Name
  7          )
  8  /
OWNER                          CONSTRAINT_NAME                TABLE_NAME                     COLUMN_NAME                       
SCOTT                          PK_DEPTNO                      DEPT                           DEPTNO                             Edited by: babaravi on Oct 5, 2009 3:34 PM