SQL ÿ¸ö·ÖÀà¸÷È¡2ÌõÊý¾Ý
create table tb (ptoid int,proclassid int,proname varchar(10))
insert tb
select 1,1,'Ò·þ1'
union all
select 2,2,'Ò·þ2'
union all
select 3,3,'Ò·þ3'
union all
select 4,3,'Ò·þ4'
union all
select 5,2,'Ò·þ5'
union all
select 6,2,'Ò·þ6'
union all
select 7,2,'Ò·þ7'
union all
select 8,1,'Ò·þ8'
select * from tb
ptoid proclassid proname
----------- ----------- ----------
1 1 Ò·þ1
2 2 Ò·þ2
3 3 Ò·þ3
4 3 Ò·þ4
5 2 Ò·þ5
6 2 Ò·þ6
7 2 Ò·þ7
8 1 Ò·þ8
£¨ËùÓ°ÏìµÄÐÐÊýΪ 8 ÐУ©
select * from tb a where
(select count(*) from tb b where b.proclassid=a.proclassid and b.ptoid>a.ptoid) <2
order by proclassid
ptoid proclassid proname
----------- ----------- ----------
1 1 Ò·þ1
8 1  
Ïà¹ØÎĵµ£º
#include "iostream.h"
#include "stdio.h"
#import "C:\program files\common files\system\ado\msado15.dll" no_namespace rename("EOF","adoEOF")
int main(int argc, char* argv[])
{
::CoInitialize(NULL);
_ConnectionPtr m_pConnection;
m_pConnection.CreateInstance("ADODB.Connection");
tr ......
--¿ç·þÎñÆ÷²éѯÈçÏ£º
SELECT a.*,b.stor_Name
from OPENROWSET('MSDASQL',
'DRIVER={SQL Server};SERVER=tom;UID=sa;PWD=123',
pubs.dbo.authors) AS a,stores b
ORDER BY a.au_lname, a.au_fname
--ÆäÖУ¬tomΪԶ³Ì·þÎñÆ÷Ãû£¬stores ÊDZ¾»úÊý¾Ý¿âpubsÖеıí
--ÐèҪעÒâµÄÊÇÈô¶þ¸ö±íÖÐµÄ ......
CREATE proc sqlToMultiExcelFile
@sqlstr nvarchar(4000), --²éѯÓï¾ä,Èç¹û²éѯÓï¾äÖÐʹÓÃÁËorder by ,Çë¼ÓÉÏtop 100 percent
@primaryKey varchar(100),--·ÖÒ³Ö÷¼ü×Ö¶Î
@path nvarchar(1000), --Îļþ´æ·ÅĿ¼
@fname nvarchar(250), --ÎļþÃû
@sheetname varchar(250)='sheet1' --Òª´´½¨µÄ¹¤×÷±íÃû,Ä ......
½â¾ö·½·¨Ò»
ÔÚoraDb10g_home->ÅäÖúÍÒÆÖ²¹¤¾ß->net Manager
ÔÚ±¾µØÖÐн¨Ò»¸ö·þÎñÃüÃû
Õâ¸öÍøÂç·þÎñÃû¾ÍÊǵǽʱµÄÊý¾Ý¿âÃû
Íê³ÉÕâЩ²Ù×÷ºó£¬Ñ¡Ôñ²Ëµ¥ÖÐÎļþ->±£´æÍøÂçÅäÖþÍokÁË¡£
½â¾ö·½·¨¶þ
´ò¿ª°²×°Ä¿Â¼Ï·þÎñÆ÷¶ËµÄtnsnames.ora£¬±ÈÈçÎÒµÄÍêÕûĿ¼ÊÇE:\oracle\product\ ......