两个问题
1。not null后面加逗号
2。deptno要加括号create table employees
(empno char(4),
ename varchar2(10),
deptno char(2) not null,
constraint emp_deptno_fk foreign key (deptno) references dept (deptno)
)
1。not null后面加逗号
2。deptno要加括号create table employees
(empno char(4),
ename varchar2(10),
deptno char(2) not null,
constraint emp_deptno_fk foreign key (deptno) references dept (deptno)
)
(empno char(4),
ename varchar2(10),
deptno char(2) not null,
constraint emp_deptno_fk foreign key (deptno) references dept (deptno)
)