Syntax for creating foreign key across users in a database

Question

There are two user present A,B.They are granted all privileges.Now in USER A, there is a table PARENT whose primary key is PARENT_NO.In USER B I have created a table CHILD whose primary key is CHILD_NO.
In the CHILD table of USER B, I want to create a foreign key relation to the PARENT table of USER A.For this I have created a column CHILD_PARENT_NO in the CHILD table.If anybody knows the syntax please post the syntax for creating the required foreign key relationship?

Answer 1

Please post your code. Cut'n'paste from SQL*Plus like this...
SQL> conn a/a
Connected.
SQL> desc t1
Name                                      Null?    Type
COL1                                               NUMBER
COL2                                               VARCHAR2(10)
SQL> grant references on t1 to b;
Grant succeeded.
SQL> conn b/b
SQL> create synonym a_t for a.t1;
Synonym created.
SQL> alter table test add constraint fk foreign key (n) references a_t(col1);
Table altered.
SQL> Note that Oracle will translate the synonym anyway...
SQL> select constraint_name, r_owner, r_constraint_name
  2  from  user_constraints
  3  where table_name = 'TEST'
  4  /
CONSTRAINT_NAME R_OWNER R_CONSTRAINT_NAME
FK              A       T1_PK
SQL> By the way, this ...
GRANT ALL PRIVILEGES TO B;... is a mindbendingly unsafe way of proceeding. In real life you would have given user B the power to utterly destroy your database. It's always easier to start with good habits than to break bad ones so please get used to granting only the minimum set of privileges necessary.
Cheers, APC