Linq学习(二)-本次学习用到的资料

本次学习用到的数据库初始化脚本如下

use KMS
create table Blog_User
(    
    UserId int primary key identity(1,1),
    NickName nvarchar(10),
    CreateTime datetime
)
create table Blog_LeaveMsg
(
    ID int primary key identity(1,1),
    ReceiverId int,
    foreign key(ReceiverId) references Blog_User(UserId),
    LeaverId int,
    foreign key(LeaverId) references Blog_User(UserId),
    CreateTime datetime,
    [Content] nvarchar(255)
)
create table Blog_UserInfo
(
    ID int,
    foreign key(ID) references Blog_User(UserId),
    Introduce nvarchar(255),
    RealName nvarchar(10)
)
insert into Blog_User values('Kimisme','2016-1-11')
insert into Blog_User values('FriendLee','2016-1-12')
insert into Blog_User values('FriendZhao','2016-1-13')
insert into Blog_UserInfo values(1,'大家好，我叫金某','金某')
insert into Blog_UserInfo values(2,'大家好，我叫李某','李某')
insert into Blog_UserInfo values(3,'大家好，我叫赵某','赵某')
insert into Blog_LeaveMsg values(1,1,'2016-1-20','我在看书，你在干嘛')
insert into Blog_LeaveMsg values(1,2,'2016-1-20','我在运动')
insert into Blog_LeaveMsg values(1,3,'2016-1-21','我在玩游戏')
insert into Blog_LeaveMsg values(1,2,'2016-1-23','羽毛球打的手好酸')
insert into Blog_LeaveMsg values(1,3,'2016-1-22','LOL五黑中')
insert into Blog_LeaveMsg values(1,2,'2016-1-25','每天散散步真不错')
insert into Blog_LeaveMsg values(1,3,'2016-1-24','我剑灵游戏又满级了')
insert into Blog_LeaveMsg values(1,2,'2016-1-25','要不要来打网球')

各表关系如下