Oracle get foreign keys
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'
Using @maephisto solution will case a little bug:
If the source tables primary key is a composite key
then running the query will result duplicate unnecessary records
.
Consider T1 and T2 tables:
Master table T1:
create table T1( pk1 NUMBER not null, pk2 NUMBER not null);alter table T1 add constraint T1PK primary key (PK1, PK2);
Detail table T2:
create table T2( pk1 NUMBER, pk2 NUMBER, name1 VARCHAR2(100));alter table T2 add constraint T2FK foreign key (PK1, PK2) references T1 (PK1, PK2);
The result of the @maephisto query will be:
To over come the problem the query bellow will serve:
SELECT master_table.TABLE_NAME MASTER_TABLE_NAME, master_table.column_name MASTER_KEY_COLUMN, detail_table.TABLE_NAME DETAIL_TABLE_NAME, detail_table.column_name DETAIL_COLUMN FROM user_constraints constraint_info, user_cons_columns detail_table, user_cons_columns master_table WHERE constraint_info.constraint_name = detail_table.constraint_name AND constraint_info.r_constraint_name = master_table.constraint_name AND detail_table.POSITION = master_table.POSITION AND constraint_info.constraint_type = 'R' AND constraint_info.OWNER = 'MY_SCHEMA'
They are listed in the system view ALL_CONSTRAINTS
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_1037.htm#i1576022
Edit
The columns involved in the constraints are listed in ALL_CONS_COLUMNS
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_1035.htm#i1575870