SQLServer查詢已知數相鄰前後數

1. 資料庫的設計和實現

--建立資料庫

create database school
on primary
(name =
'school_data'
,filename =
'd:\data\school_data.mdf'
,size =
5mb,
maxsize =
50mb,
filegrowth =10%
)log on
(name =
'school_log'
,filename =
'd:\data\school_log.ldf'
,size =
1mb,
filegrowth =10%
)

--建立資料表

create table student
(stuno varchar(16
) not null
,stuname varchar(32
) not null
,stu*** varchar(8
) not null
,stuage int not null
,stuseat int not null
,)

insert into student values

('s2001'
,'張三丰'
,'男',17
,1)insert into student values
('s2002'
,'張無忌'
,'男',15
,2)insert into student values
('s2003'
,'梅超風'
,'男',20
,3)

方法一

declare @number int

select @number =  stuseat from student where stuname =
'張無忌'
select * from student where stuseat = @number+
1 or stuseat = @number-
1

declare @number int

select @number =  stuseat from student where stuname =
'張無忌'
select * from student where stuseat in
(@number+
1, @number-
1)

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