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1.创建存储过程
create or replace 存储过程名 （输出参数 in or out ）
is/as
--定义参数
v_name varchar2（10）：= ‘某某’；
--可以进行赋值
v_number T1_student.number1%type;
--%type 可以便捷获取数据类型
begin
select 表名.列名 into 变量名 from 表 where 条件
dbms_output.put.line( 变量名 )
--赋值并且输出变量名
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-- 更新数据
select 表名.列名 into 变量名 from 表 where 条件
select 临时表名 from 数据
--传入参数后
--变量名 = v_name
update 临时表.数据列 from 数据来源表 set 变量名 = ‘’ ；
设置或更改 触发器
create triigit name
数据更新
并且输出日志
log
可以确保数据出现失误时候查看日志 方便管理
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--实例
- Function : sps_log_add
-- Description : record all sps change log
--1 get all new sps (find sps which in new table not in old table)
--2 get all deleted sps (find sps which in old table not in new table)
--3 get all updated sps (find sps which in old talbe are not same in new table)
-- any change will record into sps_log table
------------------------------------------------------------------------------------------------------*/
CREATE procedure [dbo].[sps_log_add]
as
-- clear out sps_new
truncate table sps_new
-- fill into sps_new
insert into sps_new
(sp_id,colid,sp_name,sp_content,record_date)
select
a.id,
a.colid,
b.name,
a.[text],
getdate()
from
syscomments a
left join
sysobjects b
on a.id = b.id
where b.type='P' and b.name not like 'dt_%'
-- Find new sp
insert into
sps_log
select distinct
sp_id,
getdate(),
'Added',
sp_name
from
sps_new
where
sp_id not in (select distinct sp_id from sps_old)
-- Find deleted sp
insert into
sps_log
select distinct
sp_id,
getdate(),
'Removed',
sp_name
from
sps_old
where
sp_id not in (select distinct sp_id from sps_new)
-- compare existing sp
DECLARE @ProcID int
declare @count_new int
declare @count_old int
declare @text_new varchar(4000)
declare @text_old varchar(4000)
declare @name varchar(150)
declare @i int
DECLARE SearchProc CURSOR FOR
select distinct
sp_id
from
sps_new
where
sp_id in (select distinct sp_id from sps_old)
order by
sp_id
open SearchProc
FETCH NEXT FROM SearchProc
INTO @ProcID
WHILE @@FETCH_STATUS >=0
BEGIN
-- colid quantity
select @count_new=count(colid) from sps_new where sp_id = @ProcID
select @count_old=count(colid) from sps_old where sp_id = @ProcID
-- if count of colid is unequal, sp was updated.
if @count_new <> @count_old
begin
-- Record change
insert into sps_log(sp_id,change_date,action_type) values(@ProcID,getdate(),'Update')
end
else -- @count_new = @count_old, if count of colid is equal
begin
set @i=1 -- Reset Counter
while @i<=@count_new -- colid
begin
-- sp content
select @text_new = sp_content from sps_new
where sp_id = @ProcID and colid = @i
select @text_old = sp_content from sps_old
where sp_id = @ProcID and colid = @i
-- if content is different, sp was updated.
if @text_new <> @text_old
begin
-- Record change
select @name = [name] from sysobjects where id=@ProcID
insert into sps_log(sp_id,change_date,action_type,sp_name)
values(@ProcID,getdate(),'Update',@name)
end
set @i= @i+1 -- Counter + 1
end
end
FETCH NEXT FROM SearchProc
INTO @ProcID
END
CLOSE SearchProc
DEALLOCATE SearchProc
-- clear out sps_new
truncate table sps_old
-- fill into sps_old with sps_new
insert into sps_old select * from sps_new
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3创建一个存储过程从sps_log中获取指定时间内的数据
/*
-- Function : sps_log_get
-- Description : Show sps change in a period of time
*/
CREATE PROCEDURE [dbo].[sps_log_get]
@from_date datetime,
@to_date datetime
as
select
sp_name,
action_type,
CONVERT(varchar(10),change_date,102) as change_date
from
sps_log
where
change_date between @from_date and @to_date
group by
sp_name,action_type,CONVERT(varchar(10),change_date,102)
order by
CONVERT(varchar(10),change_date,102) asc
注意数据的对应关系
以及数据中实现多表的连接
数据的可行性
以及系统的性能优化问题
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