blob: 7bdce241d8871eac62c33a5cdcba4f7f6a97bc5b [file] [log] [blame]
DROP TABLE D;
DROP TABLE C;
DROP TABLE B;
DROP TABLE A;
CREATE TABLE A
(
id INT PRIMARY KEY,
name VARCHAR2(32) NULL
);
CREATE TABLE B
(
id INT PRIMARY KEY,
name VARCHAR2(32) NULL,
aId INT NULL,
FOREIGN KEY (aId) REFERENCES A (id)
);
CREATE TABLE C
(
id INT PRIMARY KEY,
name VARCHAR2(32) NULL,
aId INT NULL,
bId INT NULL,
FOREIGN KEY (aId) REFERENCES A (id),
FOREIGN KEY (bId) REFERENCES B (id),
UNIQUE (bId)
);
CREATE TABLE D
(
id INT PRIMARY KEY,
name VARCHAR2(32) NULL,
aId INT NULL,
bId INT NULL,
cId INT NULL,
FOREIGN KEY (aId) REFERENCES A (id),
FOREIGN KEY (bId) REFERENCES B (id),
FOREIGN KEY (cId) REFERENCES C (id)
);
commit;
quit;