use Test
Create table Student(
ID int identity(1,1) primary key,
[Name] nvarchar(50) not null
)
Create Table Book(
ID int identity(1,1) primary key,
[Name] nvarchar(50)not null,
StudentID int not null
)
insert into Student values(\'ÕÅÈý\')
insert into Student values(\'ÀîËÄ\')
insert into Student values(\'ÍõÎå\')
select * from student
--ÕÅÈý½èµÄÊé
insert into Book values(\'ºìÂ¥\',1)
insert into Book values(\'´ó»°ºìÂ¥\',1)
--ÀîËĽèµÄÊé
insert into Book values(\'Èý¹ú\',2)
--ÍõÎåû½èÊé
--Ò»±¾´íÎóµÄ¼Ç¼
insert into Book values(\'´íÎóʱÔõÑùÁ·³ÉµÄ\',111)
--×óÁ¬½Ó
select s.name,b.name from student as s
left join Book as b on s.id=b.studentid
--ÓÒÁ¬½Ó
select s.name,b.name from student as s
right join Book as b on s.id=b.studentid
《简单的SQL语句.doc》
将本文的Word文档下载到电脑，方便编辑。
推荐度：
点击下载文档