Oracle中查看primary key 和 foreign key 的方法

查看table中的primary key

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner
FROM all_constraints cons, all_cons_columns cols
WHERE cols.table_name = 'TABLE_NAME'
AND cons.constraint_type = 'P'
AND cons.constraint_name = cols.constraint_name
AND cons.owner = cols.owner
ORDER BY cols.table_name, cols.position;

查看user的所有的foreign key

SELECT a.constraint_name, a.table_name, a.column_name, c.owner,
        c_pk.table_name r_table_name, b.column_name r_column_name
   FROM user_cons_columns a
   JOIN user_constraints c ON a.owner = c.owner
        AND a.constraint_name = c.constraint_name
   JOIN user_constraints c_pk ON c.r_owner = c_pk.owner
        AND c.r_constraint_name = c_pk.constraint_name
   JOIN user_cons_columns b ON C_PK.owner = b.owner
        AND C_PK.CONSTRAINT_NAME = b.constraint_name AND b.POSITION = a.POSITION
  WHERE c.constraint_type = 'R';