Question

create database MC120203207

create table employee
(
    id varchar (15) not null, 
    Name nvarchar (50) not null,
    Address nvarchar (75) not null,
    DoB date not null, 
    primary key(id)
);

create table Payroll
(
    id varchar (10)not null,
    Allowances float not null,
    Msalary float not null,
    References employee(id),
    primary key(id)
);

create table Hourly
( 
    id varchar (10)not null,
    HourlyRate float not null,
    References employee(id),
    primary key (id)
);

Create Table Projects 
(
    id varchar (10) not null,
    Code int (10) not null, 
    Description varchar (50) not null, 
    primary key (code)
);

Insert into employee (id, name, address, DoB) values ('MC120203207', 'Aurang Zeb Khan', 'Bannu', 27-02-1980)
Insert into employee (id, name, address, DoB) values ('BC120201875', 'Alam Zeb Khan', 'Bannu', 02-08-1992)

查询中存在问题，请帮助解决它...它显示消息

Msg 142，Level 15，State 2，Line 0
  用于定义'TABLE'约束的语法不正确。

Msg 142，Level 15，State 2，Line 0
  用于定义'TABLE'约束的语法不正确。

Answer 1

您的表格中需要有一个列，引用employee.id - 只需单独编写references employee(id) 就不够了！。

请注意您在Payroll（或Hourly）中定义的外键列必须 完全相同的数据类型作为您引用的列。

试试这个：

create table Payroll
(
    id varchar (10)not null,
    Allowances float not null,
    Msalary float not null,
    employeeId varchar(15) references employee(id),
    primary key(id)
);

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