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DROP SEQUENCE A_S; CREATE SEQUENCE A_S; DROP SEQUENCE B_S; CREATE SEQUENCE B_S; DROP TABLE A_TEST; CREATE TABLE A_TEST ( ANO NUMBER DEFAULT A_S.NEXTVAL PRIMARY KEY, ANAME VARCHAR2(20)); DROP TABLE B_TEST; CREATE TABLE B_TEST ( BNO NUMBER DEFAULT B_S.NEXTVAL PRIMARY KEY, BNAME VARCHAR2(20), ANO NUMBER, CONSTRAINT B_FK FOREIGN KEY (ANO) REFERENCES A_TEST(ANO));

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