@$ORACLE_HOME\RDBMS\ADMIN\utlexcpt.sql; EXCEPTIONS 子句幫助識別違反約束的行 TRUNCATE TABLE EXCEPTIONS; ALTER TABLE "SCOTT"."ADDRESS" ADD FOREIGN KEY ("PARENTADDRESSID") REFERENCES "SCOTT"."ARDADDRESS" ("ID") ENABLE EXCEPTIONS INTO exceptions; select * from ADDRESS where rowid in (select row_id from exceptions);