Assume that the table "employee" has fields such as number, name, age, title, and nationality. The field that can be used as key is().
A: number
B: name
C: age
D: title
A: number
B: name
C: age
D: title
举一反三
- 当你作为服务员询问客人预定信息时,至少应该询问以下什么信息? A: time;name;address;phone number;the number of people B: time;name;age;address;phone number C: name;age;phone number;date;the number of people D: time;name;date;phone number;the number of people
- In business situation, we can think about 3 most important things, namely, your________. A: name, age, company B: name, title, company C: name, company, marital status D: name, title, marital status
- 下来定义表的约束语法,错误的是() A: create table t1(id number primary key,name varchar2(10)) B: create table t1(id number constraint p_k primary key(id),name varchar2(10)) C: create table t1(id number constraint p_k primary key,name varchar2(10)) D: create table t1(id number,name varchar2(10),primary key(id))
- 有如下类的定义，创建Employee对象错误的是（） public class Employee{ private int age; private String name; public Employee(int age){ this.age = age; } public Employee(String name){ this.name = name; } public Employee(int age,String name){ this(age); this.name = name; } } A: Employee emp = new Employee(10); B: Employee emp = new Employee("Tom"); C: Employee emp = new Employee(); D: Employee emp = new Employee(10,"Tom");
- 1. LAST NAME: FIRST NAME: OCCUPATION: NATIONALITY: AGE: