SQL存储过程

(1)不带参数：

use studb

go

if exists (select * from sysobjects where name ='proc_stu')

drop procedure proc_stu

go

create procedure proc_stu

as

declare @writtenAvg float,@labAvg float

select @writtenAvg=AVG(writtenExam),@labAvg=AVG(labExam) from stuMarks

print  '笔试平均分： ' + convert(varchar(5),@writtenAvg)

print '机试平均分:'  +convert(varchar(5),@labAvg)

if(@wirttenAvg>70 and labAvg>70)

print '本班成绩：优秀'

else

print '本班成绩:较差'

select  stuname,stuinfo.stuno,writtenExam,labExam fomr stuinfo innner join stuMarks on stuinfo.stuno=stuMarks.sutno where writtenExam<60 or stuExam<60

go

exec proc_stu

 

(2)创建带输入参数的存储过程

use studb

go

if exists(select * from sysobjects where name='proc_stu')

drop procedure proc_stu

go

create procedure proc_stu

@writtenPass int=60,

@labpass int=60

as

select stuname,stuinfo.stuno,writtenExam,labExam from stuinfo inner join stumarks on stuinfo.stuno=stumarks.stuno where writtenExam<@writtenPass or labExam<@labpass

go

exec proc_stu     相当于（exec proc_stu 60,60）

exec proc_stu 64 相当于（exec proc_stu 64,60）

exec proc_stu 60,50

exec proc_stu @labpass=55,@writtenpass=65   相当于（exec proc_stu 65,55）

(3)创建带输出参数的存储过程

use studb

go

if exists (select * from sysobjects where name='proc_stu')

drop procedure proc_stu

go

create procedure proc_stu

@notpasssum in output,

@writtenpass int=60,

@lapass int=60

as

select stunam,stuinfo.stuno,writtenexam,labexam from stuinfo inner join stuMarks on stuinfo.stuno=stumarks.stuno where writtenexam<@writtenpass or labExam<@labpass

select @notpasssum=count(stuno) from stumarks where writtenexam<@writtenpass or labExam<@labpass

go

declare @sum int

exec proc_stu @sum output,64

if

@sum>=3

print '未通过人数:' +convert(varchar(5),@sum) + '人'

else

print '为通缩人数:' +convert(carchar(5),@sum) + '人'

go