Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

mssql row_number() partition ʹÓ÷½·¨Àí½â

Sql2005ÖÐʹÓÃow_number() partition½øÐзÖ×éʵÑ飬
SQL£º
select * from stu
select id,row_number() over (partition by snm order by id) from stu
½á¹û£º
id      snm
----------------
111 111V
111 111W
222 222N
333 3123
444 3123
555 3123
666 3232
777 3232
--·Ö×éºóµÄ½á¹û
id     
------------
111    1
111    1
222    1
333    1
444    2
555    3
666    1
777    2
¿ÉÒÔ×¢Òâµ½·Ö×éºÍÌØÊâ±ê¼ÇµÄ½á¹ûÈçÉÏÃæËùʾ


Ïà¹ØÎĵµ£º

MsSQL,MySQL,Oracle,Êý¾Ý¿âÁ¬½Ó×Ö¶Î

Ms sql 2000
drivername=com.microsoft.jdbc.sqlserver.SQLServerDriver
url=jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=books
username=sa
password=sa
MySQL
drivername=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost/books
username=root
password=root
Oracle
drivername=orac ......

MSSQLÊý¾ÝÀàÐͼ°³¤¶ÈÏÞÖÆÏêϸ˵Ã÷

SQL Server ÌṩϵͳÊý¾ÝÀàÐͼ¯£¬¶¨ÒåÁË¿ÉÓë SQL Server Ò»ÆðʹÓõÄËùÓÐÊý¾ÝÀàÐÍ¡£ÏÂÃæÁгöϵͳÌṩµÄÊý¾ÝÀàÐͼ¯¡£
¿ÉÒÔ¶¨ÒåÓû§¶¨ÒåµÄÊý¾ÝÀàÐÍ£¬ÆäÊÇϵͳÌṩµÄÊý¾ÝÀàÐ͵ıðÃû¡£ÓйØÓû§¶¨ÒåµÄÊý¾ÝÀàÐ͵ĸü¶àÐÅÏ¢£¬Çë²Î¼û sp_addtype ºÍ´´½¨Óû§¶¨ÒåµÄÊý¾ÝÀàÐÍ¡£
µ±Á½¸ö¾ßÓв»Í¬Êý¾ÝÀàÐÍ¡¢ÅÅÐò¹æÔò¡¢¾«¶È¡¢Ð¡ÊýλÊý»ò³ ......

²âÊÔMSSQLÖÐSQLÓï¾äÖ´Ðл¨·ÑµÄʱ¼ä

selectÓï¾äǰ¼Ó£º
declare @d datetime
set @d=getdate()
²¢ÔÚselectÓï¾äºó¼Ó£º
select [Óï¾äÖ´Ðл¨·Ñʱ¼ä(ºÁÃë)]=datediff(ms,@d,getdate())
ת×Ô£º¶¯Ì¬ÍøÖÆ×÷Ö¸ÄÏ www.knowsky.com
ÕâÊǼòÒ׵IJ鿴ִÐÐʱ¼äµÄ·½·¨¡£
===========================================£¨Ò»ÏÂÄÚÈÝת×Ô£º£Ã£Ó£Ä£Î£©
MSSQL ServerÖÐͨ¹ý²é ......

MSSQLÊý¾Ý¿â±¸·Ý

1
¡¢
MSSQL
Êý¾Ý¿âµÄ¶¨ÆÚ×Ô¶¯±¸·Ý¼Æ»®
 
ͨ¹ýÆóÒµ¹ÜÀíÆ÷
ÉèÖÃÊý¾Ý¿âµÄ¶¨ÆÚ×Ô¶¯±¸·Ý¼Æ»®¡£
1
¡¢´ò¿ªÆóÒµ¹Ü
ÀíÆ÷£¬Ë«»÷´ò¿ªÄãµÄ·þÎñÆ÷
2
¡¢È»ºóµãÉÏÃæ
²Ëµ¥ÖеŤ¾ß
-->
Ñ¡ÔñÊý¾Ý¿âά»¤¼Æ»®Æ÷
3
¡¢ÏÂÒ»²½Ñ¡ÔñÒª½øÐÐ×Ô¶¯±¸·ÝµÄÊý¾Ý
-->
ÏÂÒ»²½¸üÐÂÊý¾ÝÓÅ»¯ÐÅÏ¢£¬ÕâÀïÒ»°ã²»ÓÃ×öÑ¡Ôñ
-->
ÏÂÒ ......

How is MSSQL using memory?


How is MSSQL using memory?
http://www.sqlhacks.com/Administration/Memory-Usage
Memory is one the most important factor affecting MSSQL performance.
As an administrator, you should be monitoring the memory
regularly. When Microsoft SQL Server runs out of memory, it will use
virtual memory: ie: ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ