sql server 2005 ÅäÖÃÔ¶³ÌÁ¬½Ó
ÒÔÏÂ˵Ã÷¾ùÕë¶ÔÆóÒµ°æ»òÕß¿ª·¢°æ£»
1.¿ªÆôsql server ʵÀýµÄÔ¶³ÌÁ¬½Ó£»
“¿ªÊ¼”-->“³ÌÐò”-->“Microsoft SQL Server 2005”-->“ÅäÖù¤¾ß”-->“SQL Server ÍâΧӦÓÃÅäÖÃÆ÷”-->“·þÎñºÍÁ¬½ÓµÄÍâΧӦÓÃÅäÖÃÆ÷”-->“Êý¾Ý¿âÒýÇæ”-->"Ô¶³ÌÁ¬½Ó"-->“±¾µØÁ¬½ÓºÍÔ¶³ÌÁ¬½Ó”-->µ¥»÷ÊÊÓÃÓÚÄúµÄ»·¾³µÄÏàÓ¦ÐÒé(½öʹÓÃtcp/ip)
2.¿ªÆôSQL Server Browser·þÎñºÍSQL Server Agent ·þÎñ
¿ØÖÆÃæ°å-->¹ÜÀí¹¤¾ß-->·þÎñ-->Æô¶¯¸Ã¸ÃÁ½¸ö·þÎñ
3.¹Ø±Õ·À»ðǽ£¨Ò²¿ÉÒÔÅäÖã©£¬ÅäÖüûÏÂÎÄ¡£
http://support.microsoft.com/kb/914277/zh-cn
Ïà¹ØÎĵµ£º
1¡¢ÎļþºÍÎļþ×éµÄº¬ÒåÓë¹ØÏµ
ÿ¸öÊý¾Ý¿âÓÐÒ»¸öÖ÷Êý¾ÝÎļþ.ºÍÈô¸É¸ö´ÓÎļþ¡£ÎļþÊÇÊý¾Ý¿âµÄÎïÀíÌåÏÖ¡£ Îļþ×é¿ÉÒÔ°üÀ¨·Ö²¼ÔÚ¶à¸öÂß¼·ÖÇøµÄÎļþ£¬ÊµÏÖ¸ºÔØÆ½ºâ¡£Îļþ×éÔÊÐí¶ÔÎļþ½øÐзÖ×飬ÒÔ±ãÓÚ¹ÜÀíºÍÊý¾ÝµÄ·ÖÅ䣯·ÅÖá£ÀýÈ磬¿ÉÒÔ·Ö±ðÔÚÈý¸öÓ²ÅÌÇý¶¯Æ÷ÉÏ´´½¨Èý¸öÎļþ£¨Data1.ndf¡¢Data2.ndf ºÍ Data3.ndf£©£¬²¢½«ÕâÈý¸ ......
JOINÓÅ»¯
MySQLÖÐjoinµÄʵÏÖ²ÉÓõÄÊÇNested Loop JoinËã·¨¡£Í¨¹ýÇý¶¯±íµÄ½á¹û¼¯×÷Ϊѻ·»ù´¡Êý¾Ý£¬È»ºó½«¸Ã½á¹û¼¯ÖеÄÊý¾Ý×÷Ϊ¹ýÂË
Ìõ¼þÒ»ÌõÌõµÄµ½ÏÂÒ»¸ö±íÖвéѯÊý¾Ý£¬×îºóºÏ²¢½á¹û£¬Èç¹û´æÔÚºóÐø±í£¬¹ý³ÌÒ²Èç´Ë¡£
¾¡Á¿¼õÉÙjoinÓï¾äÖÐnested loopÑ»·µÄ´ÎÊý¡£×îÓÐЧµÄ·½·¨ÊÇÈÃÇý¶¯±íµÄ½á¹û¼¯¾¡¿ÉÄܵÄС
ÓÅÏÈÓÅ»¯nested ......
Ó¦Ò»¸öÅóÓѵÄÒªÇó£¬ÌùÉÏÊղصÄSQL³£Ó÷ÖÒ³µÄ°ì·¨¡«¡«
±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£º
SELECT TOP Ò³¼Ç¼ÊýÁ¿ *
from ±íÃû
WHERE (ID NOT IN
(SELECT TOP (ÿҳÐÐÊý*(Ò³Êý-1)) ID
from ±íÃû
ORDER BY ID))
O ......
¡¡¡¡µ±Ö´ÐÐÒ»ÌõDMLÓï¾äºó£¬DMLÓï¾äµÄ½á¹û±£´æÔÚËĸöÓαêÊôÐÔÖУ¬ÕâЩÊôÐÔÓÃÓÚ¿ØÖƳÌÐòÁ÷³Ì»òÕßÁ˽â³ÌÐòµÄ״̬¡£µ±ÔËÐÐDMLÓï¾äʱ£¬PL/SQL´ò¿ªÒ»¸öÄÚ½¨Óα겢´¦Àí½á¹û£¬ÓαêÊÇά»¤²éѯ½á¹ûµÄÄÚ´æÖеÄÒ»¸öÇøÓò£¬ÓαêÔÚÔËÐÐDMLÓï¾äʱ´ò¿ª£¬Íê³Éºó¹Ø±Õ¡£ÒþʽÓαêֻʹÓÃSQL%FOUND,SQL%NOTFOUND,SQL%ROWCOUNTÈý¸öÊôÐÔ.SQL%FOUND,SQ ......