sql 存储过程、事务、视图、触发器

1存储过程
1.1存储的格式
create proc name
as
begin
语句
end
1.2执行存储
exec name
1.3无参数
--创建存储过程
if (exists (select * from sys.objects where name = 'sstudent'))
drop proc sstudent
go
creates student
as
select * from student;

--调用、执行存储过程
exec student;
1.4带参数
--带参存储过程
create proc  stu

@startId int,

@endId int
as
select * from student where id between @startId and @endId
go

exec stu 2, 4;
1.5 输出参数
create proc get
@id int, --默认输入参数
@name varchar(20) out, --输出参数
@age varchar(20) output--输入输出参数
as
select @name = name, @age = age from student where id = @id and sex = @age;
go

--
declare @id int,
@name varchar(20),
@temp varchar(20);
set @id = 7;
set @temp = 1;
exec get @id, @name out, @temp output;
select @name, @temp;
print @name + '#' + @temp;

2视图
2.1创建视图
（1）使用视图向导

（2）使用语句
create view cang--创建视图的语法
as --as和go中间放上我所需要的一个查询语句
查询语句
go
2.2查看信息
select *from view_name

3事务
3.1开始事务
begin tran name
3.2提交事务
commit tran
3.3回滚事务
rollback tran

4触发器
4.1 delect
create trigger 触发的表名，delect
on 触发的表名
instead of delect
as
语句
go
instead of 替换
for 执行完成delect再触发
after执行完delect再触发
4.2 update
同上，将delect换成update
4.3 insert
同上，将delect换成update

练习
use lianxi
go
create table jin
(jcode int primary key,--序号
jname varchar(20), --商品名称
)
create table chu
(
ccode int primary key,--序号
cname varchar(20), --商品名称
cshu decimal(18,2), --出货数量
cjia decimal(18,2), --单价
cj int,
)

create table piao
(
pcode int primary key identity(101,1),--序号
pcname varchar(20), --商品名称
pshu decimal(18,2), --数量
pjia decimal(18,2) , --单价
pzong decimal(18,2),
)
go

insert into jin values(101,'摩托罗拉公司')
insert into jin values(102,'苹果公司')
insert into jin values(103,'诺基亚公司')
insert into jin values(104,'索尼公司')

insert into chu values(1001,'iphone 3gs',10,600,102)
insert into chu values(1002,'iphone 4',15,998,102)
insert into chu values(1003,'iphone 5',20,2800,102)
insert into chu values(1004,'iphone 5s',22,3300,102)
insert into chu values(1005,'VB',10,300,101)
insert into chu values(1006,'Mileston',7,600,101)
insert into chu values(1007,'N95',8,350,103)
insert into chu values(1008,'5320XM',10,450,103)
insert into chu values(1009,'L36H',14,180,104)
insert into chu values(1010,'L39H',10,2780,102)
go
select *from jin
delete from chu
select *from chu
--在没有此货物并且为进货时，添加上这一行信息；
--在没有此货物并且为出货时，打印没有此货物！

if (exists (select * from sys.objects where name = 'cunchu'))
drop proc cunchu
go
create proc cunchu
@ccode int,
@cname varchar(20),
@cshu decimal(18,2),
@cjia decimal(18,2),
@cj int
as
begin
declare @shu decimal(18,2)
declare @count int
select @count=COUNT(*) from chu where ccode=@ccode
select @shu=cshu from chu where ccode=@ccode
if @COUNT>0
begin
if @cshu >0
update chu set cshu=cshu+@cshu where ccode=@ccode
if @cshu <0
if @cshu+ @shu >0
begin
update chu set cshu=cshu+@cshu where ccode=@ccode
declare @zong decimal(18,2)
declare @xcshu decimal(18,2)
set @xcshu=-@cshu
set @zong=@cjia*@cshu
insert into piao values(@cname,@xcshu,@cjia,@zong)
end
if @cshu+ @shu <=0
print '请及时补充货物'
end
else
begin
if @cshu>0
insert into chu values(@ccode,@cname,@cshu,@cjia,@cj)
if @cshu<0
print '没有此货物'
end
end
go

select *from chu
exec cunchu @ccode=1001,@cname='iphone 3gs',@cshu=10,@cjia=600,@cj=102
exec cunchu @ccode=1001,@cname='iphone 3gs',@cshu=-5,@cjia=600,@cj=102
select *from piao
exec cunchu @ccode=1021,@cname='iphone 3gs',@cshu=10,@cjia=600,@cj=102
exec cunchu @ccode=1022,@cname='iphone 3gs',@cshu=-10,@cjia=600,@cj=102