【单选题】建立如下数据库表:Create table depa(Depid int primary key,Depname nvarchar(20) not null)Create table employee(Employeeid int not null,Depid int not null,Name nvarchar(20) not null)要想保证employee表中的每一个雇员是唯一的,且只能属...
【单选题】建立如下数据库表: create talbe Department( departID int not null primary key, deptName varchar(20) not null ) create table Employee( employeeID int not null, deptID int not null, name varchar(20) not ...
【单选题】建立如下数据库表: create table department( departid int not null primary key, deptname varchar(20) not null ) create table employee( employeeid int not null, deptid int not null, name varchar(20) not null ) 要...
【单选题】建立如下数据库表: create table Department( departID int not null primary key, deptName varchar(20) not null ) create table Employee( employeeID int not null, deptID int not null, name varchar(20) not null ) 要...