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[문제1] 원인 : 부모테이블의 존재하지 않은 값을 자식테이블에 넣으려고 할떄 에러가 발생
해결 : 외래키(Foreign Key)를 삭제
ALTER TABLE TEMP1019 DROP CONSTRAINT FK_COL01;
[문제2]
insert into score values ('hong', …) ;
[문제3]
alter table grade disable constraint student_grade_ck;;
ALTER column grade DISABLE CONSTRAINT student_grade_ck;
DROP TABLE 테이블명 CASCADE CONSTRAINTS;
grade constraint student_grade_ck references department_id CONSTRAINT fk_deptno REFERENCES departments (department_id) ); /인라인/
The text was updated successfully, but these errors were encountered:
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문제
답
[문제1]
원인 : 부모테이블의 존재하지 않은 값을 자식테이블에 넣으려고 할떄 에러가 발생
해결 : 외래키(Foreign Key)를 삭제
[문제2]
[문제3]
The text was updated successfully, but these errors were encountered: