在SQLserver中，一般寫一些儲存過程能提高資料庫操作效率。簡單記錄幾個儲存過程，以備查詢。

一、利用一個欄位進行分組求平均值、最大值、最小值；

USE [Mengtougou]
GO
/****** Object:  StoredProcedure [dbo].[extracter_Site_651031]    Script Date: 05/15/2015 09:48:14 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		
-- Create date: 2015-03
-- Description:	<Description,,>

/*
 程式碼編寫：
 
 --呼叫示例--
extracter_Site_651031 @month=7,@day=11
 
*/
-- =============================================
PROCEDURE  [dbo].[extracter_Site_651031]
	-- Add the parameters for the stored procedure here
	@month nvarchar(20), -- 輸入月份
	@day nvarchar(20)-- 輸入日份
	AS


DECLARE @str nvarchar(300)
DECLARE @str1 nvarchar(300)
DECLARE @str2 nvarchar(300)
DECLARE @filename nvarchar(30)


BEGIN
----------------------------------Site_651031---------------------------------------------------
select  Site_651031.站號,
AVG(MTG_2012clear.氣溫)as t_avg,
max(MTG_2012clear.氣溫)as t_max,
min(MTG_2012clear.氣溫)as t_min 
into temp
from Site_651031  left join MTG_2012clear 
on Site_651031.站號=MTG_2012clear.站號 
where  MTG_2012clear.月
 
[email protected] and MTG_2012clear.日[email protected] 
GROUP BY Site_651031.站號;END

set @str1='update Site_651031 set Site_651031.平均值=null, Site_651031.最大值=null,
Site_651031.最小值=null from Site_651031,temp where Site_651031.站號=temp.站號'

set @str='update Site_651031 set Site_651031.平均值=temp.t_avg, Site_651031.最大值=temp.t_max,
Site_651031.最小值=temp.t_min from Site_651031,temp where Site_651031.站號=temp.站號'

set @str2='drop table temp'
set @filename='Site_651031_'
 
[email protected]+'_'[email protected]+'_'+'.xls'
Exec(@str1)
Exec(@str)
Exec p_exporttb @tbname='Site_651031',@path='E:\MTG_TEST\',@[email protected]
Exec(@str2)

PROCEDURE [dbo].[Procedure_24SQL]
	-- Add the parameters for the stored procedure here 下面是處理過程的兩個引數
	@month nvarchar(20), -- 輸入月份
	@day nvarchar(20)-- 輸入日份
	AS
DECLARE @i int
DECLARE @str nvarchar(300)
DECLARE @str1 nvarchar(300)
DECLARE @strname nvarchar(30)
DECLARE @filename nvarchar(30)
set @i=0

WHILE @i < 24
BEGIN
set @strname='MTG2012_'
 
[email protected]+'_'[email protected]+'_'+convert(nvarchar(3),@i)
set @filename='MTG2012_'[email protected]+'_'[email protected]+'_'+convert(nvarchar(3),@i)+'.xls'

--set @str='select * into '+'MTG2012'[email protected][email protected]+'_'+convert(nvarchar(3),@i)+' 
--from MTG_2012data WHERE 月='[email protected] +' and 日='[email protected]+' and 時='+convert(nvarchar(3),@i);

set @str='select MTG_2012asp.站號,MTG_2012asp.坡向,MTG_2012data.海拔,
MTG_2012data.經度,MTG_2012data.緯度,MTG_2012data.氣溫 
into  MTG2012_'[email protected]+'_'[email protected]+'_'+convert(nvarchar(3),@i)+
' from MTG_2012asp  left join MTG_2012data on MTG_2012asp.站號=MTG_2012data.站號 
WHERE 月='[email protected] +' and 日='[email protected]+' and 時='+convert(nvarchar(3),@i);


set @str1='DROP TABLE '+ @strname
Exec(@str)
Exec p_exporttb @[email protected],@path='E:\MTG_TEST\',@[email protected]
Exec(@str1)
set @[email protected]+1 

end

@str='update MTG_2012asp set 氣溫'+convert(nvarchar(3),@i)+' =MTG_2012data.氣溫 
           from MTG_2012asp,MTG_2012data 
            where MTG_2012asp.站號=MTG_2012data.站號 and 月='[email protected] +' and 日='[email protected]+' and 時='+convert(nvarchar(3),@i);
            

--資料匯出EXCEL 

--匯出表中的資料到Excel,
--包含欄位名,
--檔案為真正的Excel檔案,
--如果檔案不存在,將自動建立檔案,
--如果表不存在,將自動建立表，
--基於通用性考慮,僅支援匯出標準資料型別
 
--鄒建 2003.10(引用請保留此資訊)--*/
 
--呼叫示例
--p_exporttb @tbname='地區資料',@path='c:\',@fname='aa.xls'

ALTER proc [dbo].[p_exporttb]
@tbname sysname,    --要匯出的表名
@path nvarchar(1000),   --檔案存放目錄
@fname nvarchar(250)=''  --檔名,預設為表名
as
declare @err int,@src nvarchar(255),@desc nvarchar(255),@out int
declare @obj int,@constr nvarchar(1000),@sql varchar(8000),@fdlist varchar(8000)
 
--引數檢測
if isnull(@fname,'')='' set @[email protected]+'.xls'
 
--檢查檔案是否已經存在
if right(@path,1)<>'\' set @[email protected]+'\'
create table #tb(a bit,b bit,c bit)
set @[email protected][email protected]
insert into #tb exec master..xp_fileexist @sql
 
--資料庫建立語句
set @[email protected][email protected]
if exists(select 1 from #tb where a=1)
 set @constr='DRIVER={Microsoft Excel Driver (*.xls)};DSN='''';READONLY=FALSE'
       +';CREATE_DB="'[email protected]+'";DBQ='[email protected]
else
 set @constr='Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties="Excel 8.0;HDR=YES'
    +';DATABASE='[email protected]+'"'
 
 
--連線資料庫
exec @err=sp_oacreate 'adodb.connection',@obj out
if @err<>0 goto lberr
 
exec @err=sp_oamethod @obj,'open',null,@constr
if @err<>0 goto lberr
 
/*--如果覆蓋已經存在的表,就加上下面的語句
--建立之前先刪除表/如果存在的話
select @sql='drop table ['[email protected]+']'
exec @err=sp_oamethod @obj,'execute',@out out,@sql
--*/
 
--建立表的SQL
select @sql='',@fdlist=''
select @[email protected]+',['+a.name+']'
 ,@[email protected]+',['+a.name+'] '
  +case 
   when b.name like '%char' 
   then case when a.length>255 then 'memo'
    else 'text('+cast(a.length as varchar)+')' end
   when b.name like '%int' or b.name='bit' then 'int'
   when b.name like '%datetime' then 'datetime'
   when b.name like '%money' then 'money'
   when b.name like '%text' then 'memo'
   else b.name end
FROM syscolumns a left join systypes b on a.xtype=b.xusertype
where b.name not in('image','uniqueidentifier','sql_variant','varbinary','binary','timestamp')
 and object_id(@tbname)=id
select @sql='create table ['[email protected]
 +']('+substring(@sql,2,8000)+')'
 ,@fdlist=substring(@fdlist,2,8000)
exec @err=sp_oamethod @obj,'execute',@out out,@sql
if @err<>0 goto lberr
 
exec @err=sp_oadestroy @obj
 
--匯入資料
set @sql='openrowset(''MICROSOFT.JET.OLEDB.4.0'',''Excel 8.0;HDR=YES;IMEX=1
   ;DATABASE='[email protected][email protected]+''',['[email protected]+'$])'
 
exec('insert into '[email protected]+'('[email protected]+') select '[email protected]+' from '[email protected])
 
return
 
lberr:
 exec sp_oageterrorinfo 0,@src out,@desc out
lbexit:
 select cast(@err as varbinary(4)) as 錯誤號
  ,@src as 錯誤源,@desc as 錯誤描述
 select @sql,@constr,@fdlist