CREATE TABLE Customers(
CustID number(5,0),
EmpID CHAR(1),
Cust_Name varchar(20) not null,
Cust_Address varchar(20) not null,
Cust_City varchar(20) not null,
Cust_State char(2) not null,
Cust_Zipcode number(5,0) not null,
Ship_Date date not null,
Order_Date date not null,
constraint ci_fk FOREIGN KEY (EmpID) references EMPLOYEES(EmpID),
constraint ci_ck check (Ship_Date>Order_Date)
)
В чем проблема?