| Constraint question. [message #372458] |
Wed, 14 February 2001 04:33  |
Jonas Blomqvist
Messages: 3
Registered: February 2001
|
Junior Member |
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Hello,
I'm quite new to SQL and haven't figured out how to set up a CONSTRAINT.
Here's the scenario with SQL:
CREATE TABLE FB_S_1 (
S_1 NUMBER NOT NULL,
S_2 NUMBER NOT NULL,
S_3 NUMBER,
S_4 NUMBER,
S_5 NUMBER,
S_6 NUMBER,
S_7 NUMBER,
S_8 NUMBER,
S_9 NUMBER,
PRIMARY KEY ( S_1, S_2 )
);
COMMENT ON COLUMN FB_S_1.S_2 IS 'The comment';
/* Create table */
CREATE TABLE FB_U_1 (
U_1 NUMBER NOT NULL,
U_2 VARCHAR2(32) NOT NULL,
U_3 VARCHAR2(32),
U_4 VARCHAR2(32),
U_5 VARCHAR2(64),
/* Set primary keys */
PRIMARY KEY ( U_1, U_2 )
);
/* Unique key */
CREATE UNIQUE INDEX U_2_PK ON
FB_U_1(U_2);
/* Sequence to update ID for new field with */
CREATE SEQUENCE U_1_SEQ START WITH 1;
/* Create trigger to launche when inserting new record */
CREATE OR REPLACE TRIGGER U_1_TRG
BEFORE INSERT ON FB_U_1
FOR EACH ROW
BEGIN
SELECT U_1_SEQ.NEXTVAL INTO :NEW.U_1
FROM DUAL;
END;
/* Here is the problem ! */
ALTER TABLE FB_S_1 ADD CONSTRAINT FB_S_1_FK1
FOREIGN KEY (S_1)
REFERENCES FB_U_1 (U_1);
It's this last clause I cant get to work. I'll get the error: "ORA-02270: no matching unique or primary key for this column-list"
Please, any help appriciated !
Regards, Jonas
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