add constraint fk
ALTER TABLE Orders
ADD CONSTRAINT FK_PersonOrder
FOREIGN KEY (PersonID) REFERENCES Persons(PersonID);
add constraint fk
ALTER TABLE Orders
ADD CONSTRAINT FK_PersonOrder
FOREIGN KEY (PersonID) REFERENCES Persons(PersonID);
how to create table in oracle sql syntax example and foreign key
CREATE TABLE hr.admin_emp (
empno NUMBER(5) PRIMARY KEY,
ename VARCHAR2(15) NOT NULL,
ssn NUMBER(9) ENCRYPT,
job VARCHAR2(10),
mgr NUMBER(5),
hiredate DATE DEFAULT (sysdate),
photo BLOB,
sal NUMBER(7,2),
hrly_rate NUMBER(7,2) GENERATED ALWAYS AS (sal/2080),
comm NUMBER(7,2),
deptno NUMBER(3) NOT NULL
CONSTRAINT admin_dept_fkey REFERENCES hr.departments
(department_id))
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