¹ØÓÚ·ÖÒ³µÄsqlÓï¾ä
¶ÔÓÚÓÐÖ÷¼ü×Ô¶¯Ôö³¤Êý¾Ý¿â±í£¬ÔÚ½øÐзÖÒ³ÉèÖÃʱ£¬ÎÒÈÏΪ»¹±È½Ï²»´íµÄÊÇ£º
SELECT TOP Ò³´óС *
from TestTable
WHERE (ID >
(SELECT MAX(id)
from (SELECT TOP Ò³´óС*Ò³Êý id
from ±í
ORDER BY id) AS T))
ORDER BY ID
Ïà¹ØÎĵµ£º
ÔÚSQL Server 2008ÖÐÒýÈëÁËhierarchyidÀ´´¦ÀíÊ÷×´½á¹¹¡£ÏÂÃæ¼òµ¥¾ÍÒÔAdventureWorks(ÎÞhierarchyid)ºÍAdventureWorks2008(ÓÐhierarchyid)ÀïµÄHumanResources.EmployeeΪÀý£¬À´ËµÃ÷Ò»ÏÂÔÚеÄhierarchyidÖÐÈçºÎ½øÐÐflat»¯µÄdimension³éÈ¡¡£
AdventureWorksÊÇ΢ÈíΪSQL ServerÌṩµÄÊý¾Ý¿âÐéÄâ°¸Àý¡£
AdventureWorksÖÐËùÒªµ ......
²»Åç¿ÚË®!Ö±½ÓÉÏͼ
1.Êý¾Ý¿â¶ÔÏó¼ìË÷¹¦ÄÜ
2.T-SQLÓï·¨°ïÖú
3.³£Óú¯Êý°ïÖú(²»¶®ÄñÓï?13×Ô¼ºÁ·Á·°É!)
Download Now
°²×°Á÷³Ì:
1.ÏȰÑÍøÂçßDzæÁË(¶ÏÍø - -!!)
2.°ÑËùÓеÄSQL Server,VS¶¼¹ØÁË,ÔËÐÐSQLPrompt 4.0.exe°²×°
3.°²×°Íê±Ïºó,Í˳öRedGate.SQLPrompt.TrayApp ......
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient; //ÒýÓÃÃüÃû¿Õ¼ä
namespace DAL
{
/*******************************************************************************
&n ......
--=======================CONVERT()==================================================
Select CONVERT(varchar(100), GETDATE(), 0)--: 05 16 2006 10:57AM
Select CONVERT(varchar(100), GETDATE(), 1)--: 05/16/06
Select CONVERT(varchar(100), GETDATE(), 2)--: 06.05.16
Select CONVERT(varchar(100), GETDATE ......
1. Ñ¡ÓÃÊʺϵÄORACLEÓÅ»¯Æ÷
ORACLEµÄÓÅ»¯Æ÷¹²ÓÐ3ÖÖ:
a. RULE (»ùÓÚ¹æÔò) b. COST (»ùÓڳɱ¾) c. CHOOSE (Ñ¡ÔñÐÔ)
ÉèÖÃȱʡµÄÓÅ»¯Æ÷,¿ÉÒÔͨ¹ý¶Ôinit.oraÎļþÖÐOPTIMIZER_MODE²ÎÊýµÄ¸÷ÖÖÉùÃ÷,ÈçRULE,COST,CHOOSE,ALL_ROWS,FIRST_ROWS . Ä㵱ȻҲÔÚSQL¾ä¼ ......