Question

I’d like to get all foreign keys in a schema, like this.
Let’s say I have tables

users(id, username, pass, address_id)

and

addresses(id, text)

I have defined a FK on users-address_id to the id column in addresses.
How should I write a query that would return me the FK columns like :
users, address_id, addresses, id ?

Thanks!

SELECT *
FROM all_cons_columns a
JOIN all_constraints c ON a.owner = c.owner
    AND a.constraint_name = c.constraint_name
JOIN all_constraints c_pk ON c.r_owner = c_pk.owner
    AND c.r_constraint_name = c_pk.constraint_name
WHERE  C.R_OWNER = 'TRWBI'

Answer 1

found it!

this is what i was looking for, thanks everybody for helping.

SELECT a.table_name, a.column_name, uc.table_name, uc.column_name 
                FROM all_cons_columns a
                JOIN all_constraints c ON a.owner = c.owner
                    AND a.constraint_name = c.constraint_name
                JOIN all_constraints c_pk ON c.r_owner = c_pk.owner
                       AND c.r_constraint_name = c_pk.constraint_name
                join USER_CONS_COLUMNS uc on uc.constraint_name = c.r_constraint_name
                WHERE  C.R_OWNER = 'myschema'