Assigning a foreign key

Question

i have created a database which is administered by ora1 who created 2 tables called student and instructor then created a new user called dev1 with dba priviliges dev1 created a table called university assigned a primary key to the university_id column and has added new columns to the instructor and student tables owned by ora1 the problem i am having is i am unable to assign foreign keys to the 2 tables owned by ora1 even though dev1 could add the extra university_id columns to the 2 tables the code i am using to add extra columns and assign the foreign keys is as follows:
alter table ora1.student
add (university_id varchar2 (5));
alter table ora1.student add
constraint student_fk1
foreign key (university_id)
references university (university_id)
on delete cascade;
I keep getting error message saying table or view does not exist

Answer 1

hi u are using the right format
ALTER TABLE <table_name>
ADD <constraint_name> FOREIGN KEY
(<column_name1> ,
<column_name2> )
REFERENCES <table_name>
(<column_name1> ,
<column_name2>)
ALTER TABLE ora1.student
ADD student_fk1 FOREIGN KEY
(university_id)
REFERENCES university (university_id)the problem may be your table doesnot exist or u are refering the table which is in different schema
Regards
Hitesh