SQL3 부모테이블삭제시 자식테이블까지 삭제 부모테이블 CREATE TABLE roomtb( ridx number, rtype VARCHAR2(100) NOT NULL, constraint mother_pk primary key (ridx), ); => constraint 제약조건명 primary key (pk값) 자식테이블 CREATE TABLE roomintb( roomin_idx NUMBER PRIMARY KEY, ridx number NOT NULL, . . . constraint child_pk foreign key (ridx) references roomtb (ridx) on delete cascade ); =>constraint 제약조건명 foreign key (fk값) references 부모테이블 (fk값) on delete cas.. 2022. 12. 9. 서브쿼리 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 SELECT * F.. 2022. 10. 11. INSERT,SEQUENCE,UPDATE,DELETE,SELECT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 INSERT INTO USERTB(uidx, id, PASSWORD, NAME, rdate) --INSERT문 p225 / --INS.. 2022. 10. 7. 이전 1 다음