SQL Server 2005 ²éѯ·ÖÎöÖÐɾ³ýÊý¾Ý¿â
USE master
GO
DECLARE @dbname sysname
SET @dbname='TEST' --Õâ¸öÊÇҪɾ³ýµÄÊý¾Ý¿â¿âÃû
DECLARE @s NVARCHAR(1000)
DECLARE tb CURSOR local FOR
SELECT s='KILL '+CAST(spid AS NVARCHAR)
from master..sysprocesses
WHERE dbid=DB_ID(@dbname)
OPEN tb
FETCH next from tb INTO @s
WHILE @@FETCH_STATUS=0
BEGIN
EXEC(@s)
FETCH next from tb INTO @s
END
CLOSE tb
DEALLOCATE tb
EXEC('DROP DATABASE ['+@dbname+']')
Ïà¹ØÎĵµ£º
ÉÏ»ØÎÒÃÇ˵µ½ÆÀ¹ÀÒ»ÌõÓï¾äÖ´ÐÐЧÂÊÖ÷Òª¿´Âß¼ IO £¨É¶ÊÇÂß¼ IO £¬É¶ÊÇÎïÀí IO ¼ûÁª»úÎĵµ£©£¬Õâ´ÎÎÒÃǼÌÐø¡£
ÎÒÃÇÏÈ˵˵£¬·µ»Ø¶àÐнá¹ûʱ£¬ÎªÊ²Ã´ SQLServer ÓÐʱ»áÑ¡Ôñ index seek £¬ÓÐʱ»áÑ¡Ôñ index scan ¡£
ÒÔ nonclustered index ΪÀý˵Ã÷¡£
ÏñËùÓеÄË÷Òý B Ê÷Ò»Ñù£¬·Ç¾Û¼¯Ë÷ÒýÊ÷Ò²°üÀ¨ÍêÈ«ÓÉË÷ÒýÊý¾Ý×é³ÉµÄ¸ù½ ......
´óÐÍϵͳµÄÉú²ú»·¾³£¬Ò»°ãÇé¿öÏ£¬ÎÒÃÇÆÀ¼ÛÒ»Ìõ²éѯÊÇ·ñÓÐЧÂÊ£¬¸ü¶àµÄÊǹØ×¢Âß¼ IO( ÖÁÓÚΪʲô£¬»ØÍ·²¹Ò»Æª ) ¡£ÎÒÃdz£Ëµ£¬“Òª½¨±ëº·µÄË÷Òý”¡¢“Ҫд¸ßЧµÄ SQL ”£¬Æäʵ×îÖÕÄ¿µÄ¾ÍÊÇÔÚÏàͬ½á¹û¼¯Çé¿öÏ£¬¾¡¿ÉÄܼõÉÙÂß¼ IO ¡£
1.1 where Ìõ¼þµÄÁÐÉ϶¼µÃÓÐͳ¼ÆÐÅ ......
ÏÈ˵˵ÕâЩÎóÇø¡£Ëùν“ÎóÇø”£¬ÓÐһЩÊÇÐÂÊÖºÜÈÝÒ×·¸µÄ´íÎó»òÕߺÜÈÝÒ׺öÂÔµÄÎÊÌ⣬ÁíÍâһЩ£¬ÔòÊÇÏñ“ºÄ×Ó³ÔÁËÑλá±ä³Éòùòð”Ò»Ñù£¬ÈÃÎÒÃÇ´ÓС¾ÍÈÏΪÊÇÕýÈ·µÄÊÂÇé¡£ÈçÏ£º
1¡¢ ±íÉϲ»¹ÜÓõÃ×ÅÓò»×Å£¬¶¼¼Ó¸ö¾Û¼¯Ë÷Òý¡£
ÎÒÃÇÖªµÀ£¬±íÒÔÁ½ÖÖ·½Ê½×éÖ¯ÎïÀí´æ´¢£ºÓоۼ¯Ë÷ÒýµÄ“¾Û¼¯± ......
Ó¦Ò»Î»ÍøÓѵÄÐèÇ󣬲¢ÐÞÕýÁËMVPÀîºé¸ù".NETƽ̨ÏÂWEBÓ¦ÓóÌÐòµÄ²¿Êð(°²×°Êý¾Ý¿âºÍ×Ô¶¯ÅäÖÃ)"ÖеÄosqlÓ÷¨´íÎó£¬ÒѲâÊÔͨ¹ý¡£
Ò»).´´½¨²¿ÊðÏîÄ¿
1. ÔÚ“Îļþ”²Ëµ¥ÉÏÖ¸Ïò“Ìí¼ÓÏîÄ¿”£¬È»ºóÑ¡Ôñ“н¨ÏîÄ¿”¡£
2. ÔÚ“Ìí¼ÓÐÂÏîÄ¿”¶Ô»°¿òÖУ¬Ñ¡Ôñ“ÏîÄ¿ÀàÐÍ”´°¸ñÖ ......
´´½¨sqlÊý¾Ý¿â¸´ÖƵķ¢²¼¡¢¶©ÔĵÄÎÊÌâ´¦Àí[ת]
²Ù×÷ʹÓõÄһЩ¼¼ÇÉ(ÊÂÎñ¸´ÖÆÀàÐÍ):
1.ÈçºÎÐÞ¸ÄÒ»¸öÒѾ·¢²¼µÄ±íµÄÊôÐÔ?
½«·¢²¼ËùÓж©ÔÄɾ³ý,(·¢²¼²»ÓÃɾ³ý),¾Í¿ÉÒÔÔÚ·¢²¼ÊôÐÔµÄÏîÄ¿ÖÐÈ¡Ïû±í,È»ºó¾Í
¿ÉÒÔÐÞ¸ ......