ms sql : xp_cmdshell
Ïò¸ßÊÖÇë½ÌÒ»¸öÎÊÌâ:
µ±ÎÒÖ´ÐÐ:
use master
exec xp_cmdshell 'osql /S musqlserver /U sa /P mypwd /d haodb /Q "select top 10 * from trandetail" /o C:\my1.xls'
ÒÔÉÏÖ´Ðгɹ¦,»á²úÉúÐÂÎļþ:C:\my1.xls'
È»ºóÎÒÏ뽫´ËÎļþÖ±½Ócopyµ½Áíһ̨µçÄÔÖÐ[Òѽ¨Á¬½Ó]
Ö´ÐÐ
EXEC xp_cmdshell 'copy C:\my1.xls \\192.168.42.42\d$'
ʱºò,ϵͳ»áÌáʾ"¾Ü¾ø·ÃÎÊ"
¶øÔÚDOS´°¿ÚÖÐÖ´ÐÐ:
C:\my1.xls \\192.168.42.42\d$ ÔòûÓÐÈκÎÎÊÌâ
ÎÒÏëÓ¦¸ÃÊÇÓû§È¨ÏÞµÄÎÊÌâ
ÒòΪÔÚsqlÖÐ,Óû§ÊÇsa
ÔÚDOSÖÐ,Óû§ÔòÊÇadministrator
ÄÇÎÒÓ¦¸ÃÔõô×ö??
ÏȽ¨Á¢¹²ÏíÐÅÓùØÏµ
master..xp_cmdshell 'net use \\192.168.42.42\d$ 123 /user:domain\administrator'
¹ØÓÚnet useµÄÓ÷¨¿´°ïÖú¡£
exec xp_cmdshell 'net use Z: \\192.168.42.42\d$ /user:domain\administrator'
exec xp_cmdshell 'copy C:\my1.xls Z:\'
exec xp_cmdshell 'net use Z: /del'
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 ......
ÔÚSQL Server 2008Ï£¬ÍøÉÏÒÔǰÁ÷ÐеĽضÏÈÕÖ¾²¢ÊÕËõÎļþµÄ·½·¨²»ÊʺÏÁË£¬±¨Óï·¨´íÎó¡£
ͬʱÒòΪÎÒµÄÊý¾Ý¿âÈÕÖ¾Ôö³¤·Ç³£¿ì£¬´ó¸ÅÿÌìÔÚ1GÒÔÉÏ£¬Òò´Ë±ØÐë¶ÔÆä½øÐÐÊÕËõ¡£
¾¹ýÔÚϵͳÉϵIJâÊÔ£¬¸Ð¾õÓÃSQL SERVERµÄά»¤¼Æ»®¸ü¿ÉÐУ¬ÏÖ½«²Ù×÷·½Ê½¼ò½éÈçÏ£º
×¢£ºÏÂÃæµÄ˵Ã÷ÖÐÒ²Ìáµ½ÁËʹÓòîÒ챸·Ý£¬ÒòΪÊý¾Ý¿âÎļþÔö³¤Ò²·Ç ......
Ò»¡¢»ù´¡
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop database dbname
3¡¢ËµÃ÷£º±¸·Ýsql server
--- ´´½¨ ±¸·ÝÊý¾ÝµÄ device
USE master
EXEC sp_addumpdevice 'disk', 'testBack', 'c:\mssql7backup\MyNwind_1.dat'
--- ¿ªÊ¼ ±¸·Ý
BACKUP DATABASE pubs TO testBack
......
-- sql 2005
1.rownumÓ÷¨
select * from(
Select rownum=row_number() over(order by 1),* from table
)a where rownum between  ......
Ðл»ÁУº
--> Éú³É²âÊÔÊý¾Ý±í: [tb]
IF OBJECT_ID('[tb]') IS NOT NULL
DROP TABLE [tb]
GO
CREATE TABLE [tb] ([a] [int],[b] [int],[c] [int])
INSERT INTO [tb]
SELECT '3','9','5' UNION ALL
SELECT '5','2','7' UNION ALL
SELECT '6','3','8'
--SELECT * from [tb]
-->SQL²éѯÈçÏ ......