閱讀this和also this
例如
CREATE TABLE DATASET (VAL1 CHAR (1 CHAR),
VAL2 VARCHAR2 (10 CHAR),
VAL3 NUMBER);
INSERT INTO
DATASET (VAL1,
VAL2,
VAL3)
VALUES
('b',
'b-details',
2);
INSERT INTO
DATASET (VAL1,
VAL2,
VAL3)
VALUES
('a',
'a-details',
1);
INSERT INTO
DATASET (VAL1,
VAL2,
VAL3)
VALUES
('c',
'c-details',
3);
INSERT INTO
DATASET (VAL1,
VAL2,
VAL3)
VALUES
('a',
'dup',
4);
INSERT INTO
DATASET (VAL1,
VAL2,
VAL3)
VALUES
('c',
'c-details',
5);
COMMIT;
CREATE VIEW TESTER (C1,
C2,
C3 UNIQUE RELY DISABLE NOVALIDATE)
AS
SELECT
VAL1,
VAL2,
VAL3
FROM
DATASET;
您可以創建唯一鍵或主鍵(最初禁用)視圖 – SriniV
我可以做即使我在桌子上沒有主鍵? 如果是這樣怎麼樣? – PAVITRA