CREATE TABLE EMPLOYEE
(
FNAME VARCHAR(15) NOT NULL,
MINIT CHAR,
LNAME VARCHAR(15) NOT NULL,
SSN CHAR(9) NOT NULL,
BDATE DATE,
ADDRESS VARCHAR(30),
SEX CHAR,
SALARY DECIMAL(10,2),
SUPERSSN CHAR(9),
DNO INT NOT NULL DEFAULT 1,
PRIMARY KEY (SSN),
INDEX (SUPERSSN),
INDEX (DNO)
)TYPE = INNODB;
CREATE TABLE DEPARTMENT
(
DNAME VARCHAR(15) NOT NULL,
DNUMBER INT NOT NULL,
MGRSSN CHAR(9) NOT NULL DEFAULT '888665555',
MGRSTARTDATE DATE,
PRIMARY KEY (DNUMBER),
UNIQUE (DNAME),
INDEX (MGRSSN)
)TYPE = INNODB;
ALTER TABLE EMPLOYEE
ADD FOREIGN KEY (SUPERSSN) REFERENCES EMPLOYEE(SSN)
ON DELETE SET NULL
ON UPDATE CASCADE;
ALTER TABLE EMPLOYEE # here is the buggy code
ADD FOREIGN KEY (DNO) REFERENCES DEPARTMENT(DNUMBER)
ON DELETE SET DEFAULT
ON UPDATE CASCADE;
ALTER TABLE DEPARTMENT
ADD FOREIGN KEY (MGRSSN) REFERENCES EMPLOYEE(SSN)
ON DELETE SET DEFAULT
ON UPDATE CASCADE ;
Please tell me what could be wrong,
Yours Sincerely
Morten Gulbrandsen
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