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?//显示器，键盘，鼠标，内存条 display,keyboard,mouse
SELECT
???? 产品号 as productid,
???? productname =
????? CASE 产品名称
???????? WHEN '显示器' THEN 'display'
???????? WHEN '键盘' THEN 'keyboard'
???????? WHEN '鼠标' THEN 'mouse'
???????? WHEN '内存条' THEN 'memory'
???????? ELSE '尚未分类'
????? END,
??? 供应商号 as supplierid,
??? 价格 as price,库存 as stocks
??
????
FROM 产品
go
/*3 将显示器，键盘，鼠标，内存条的价格分别上调8%，7%，6%，5%*/
update 产品 set 价格=价格*1.08 where 产品号=001
update 产品 set 价格=价格*1.07 where 产品号=002
update 产品 set 价格=价格*1.06 where 产品号=003
update 产品 set 价格=价格*1.05 where 产品号=004
?
update 产品
set 价格=
case??
?? when? 产品号='001' then 价格*1.08
?? when? 产品号='002' then 价格*1.07
?? when? 产品号='003' then 价格*1.06
?? else 价格*1.05
end
select *
from 产品
?
create table course
(
? course_id char(6)? not null primary key,
? course_name varchar(20) not null,
? course_hours int not null,
? course_credit float(6) not null
)
go
create table grade
(
?grade_id char(10) not null,
?course_id? char(6) not null
?foreign key (course_id) references course(course_id),
?course_name varchar(20) not null,
?mark int,
?makeup int
)
go
alter table grade
add constraint? pk_grade primary key (grade_id,course_id)
go??
create table empleoyee
(
empid int not null primary key,
empname varchar(10) not null,
sex char(2) not null,
department varchar(20) not null,
job varchar(20) not null,
startdate datetime not null,
gongling as datediff(yy,startdate,getdate()),?
tel varchar(11)
)
go?
insert into course values('030110','面向对象数据库基础',30,3.4)
insert into course values('030111','计算机网络',32,2)
insert into course values('030112','数据仓库',24,2)
insert into course values('030113','近世代数',16,1)
insert into course values('030114','计算机高新计术',1)
select * from course
insert into grade values('050310','030111',45,65)
insert into grade(grade_id,course_id,course_name,mark) values('050311',80)
insert into grade(grade_id,mark) values('050312',84)
insert into grade values('050313',56,75)
insert into grade(grade_id,mark) values('0503114',91)
?
insert into empleoyee(empid,empname,sex,department,job,tel) values(1,'wang','m','sqlserver','teacher','1989-01-01','1234567890')
select * from empleoyee
?
create index 成绩_课程号学号_index1 on? grade( course_id,grade_id)
go
create index 成绩_成绩_index1 on? grade(mark)
go
sp_helpindex grade
go
sp_rename? 'grade.成绩_成绩_index1','成绩_01'
go
sp_rename? 'grade.成绩_课程号学号_index1','成绩_02'
go
select * from grade where? mark='84'
drop table grade
sp_helpindex grade
create? index ga on grade(mark)
?
Select? @@SERVERNAME? as 本地服务器
Select getdate() as 'Today''s date and time'
（编辑：李大同）
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