ÆôÓÃMSSQL·Ö²¼Ê½ÊÂÎñµÄ³£¼ûÎÊÌâ
ÈçºÎ´´½¨Á´½Ó·þÎñÆ÷
IF EXISTS (SELECT srv.name from sys.servers srv WHERE srv.server_id != 0 AND srv.name = N'Á´½Ó·þÎñÆ÷Ãû')
EXEC master.dbo.sp_dropserver @server=N'Á´½Ó·þÎñÆ÷Ãû'', @droplogins='droplogins'
GO
EXEC master.dbo.sp_addlinkedserver
@server = N'Á´½Ó·þÎñÆ÷Ãû'', @srvproduct=N'SQLNCLI', @provider=N'SQLNCLI', @datasrc=N'Á´½Ó·þÎñÆ÷IPµØÖ·'
EXEC master.dbo.sp_addlinkedsrvlogin
@rmtsrvname=N'Á´½Ó·þÎñÆ÷Ãû'',@useself=N'False',@locallogin=NULL,@rmtuser=N'sa',@rmtpassword='Á´½Ó·þÎñÆ÷ÃÜÂë'
Æô¶¯DTC·þÎñ
·þÎñÃû³Æ£ºDistributed Transaction Coordinator
ÃüÁîÐÐÆô¶¯£ºnet start MSDTC
ÉèÖ÷ÃÎÊȨÏÞ
windows2003&xp
²Î¿¼£ºhttp://support.microsoft.com/kb/817064/zh-cn
windows2008
²Î¿¼£ºhttp://technet.microsoft.com/zh-cn/library/cc753510(WS.10).aspx
Ïà¹ØÎĵµ£º
xtype ´ú±íÀàÐÍ
C = CHECK Ô¼Êø
D = ĬÈÏÖµ»ò DEFAULT Ô¼Êø
F = FOREIGN KEY Ô¼Êø
L = ÈÕÖ¾
FN = ±êÁ¿º¯Êý
IF = ÄÚǶ±íº¯Êý
P = ´æ´¢¹ý³Ì
PK = PRIMARY KEY Ô¼Êø£¨ÀàÐÍÊÇ K£©
RF = ¸´ÖÆɸѡ´æ´¢¹ý³Ì
S = ϵͳ±í
TF = ±íº¯Êý
TR = ´¥· ......
½ñÌìÔÚÁÄÌìϵͳÖÐÐèҪϵͳִÐÐÒ»¸ö¶à²ãǶÌײéѯ¡£
Ò»¿ªÊ¼Óï¾äÈçÏÂ×ܳöÏÖ´íÎó£ºÔÀ´ÊÇÔÚ]='123') ºóÎÒ¶à¼ÓÁËÒ»¸ö as tb1
¸ÄΪÈçϺó£¬ÕýÈ·ÔËÐС£
select * from ( select top(10) * from ( select top(100) * from (select [chatcontent].[senderid],[chatcontent].[id] ,[chatcontent].[toid] ,[chatc ......
1.¶Ô²éѯ½øÐÐÓÅ»¯£¬Ó¦¾¡Á¿±ÜÃâÈ«±íɨÃ裬Ê×ÏÈÓ¦¿¼ÂÇÔÚ where ¼° order by Éæ¼°µÄÁÐÉϽ¨Á¢Ë÷Òý¡£
2.Ó¦¾¡Á¿±ÜÃâÔÚ where ×Ó¾äÖжÔ×ֶνøÐÐ null ÖµÅжϣ¬·ñÔò½«µ¼ÖÂÒýÇæ·ÅÆúʹÓÃË÷Òý¶ø½øÐÐÈ«±íɨÃ裬È磺
select id from t where num is null
¿ÉÒÔÔÚnumÉÏÉèÖÃĬÈÏÖµ0£¬È·±£±íÖÐnumÁÐûÓÐnullÖµ£¬È»ºóÕâÑù²éѯ£º
select id ......
Êý¾ÝÀàÐÍ
ÀàÐÍ
ÃèÊö
bit
ÕûÐÍ
bit Êý¾ÝÀàÐÍÊÇÕûÐÍ£¬ÆäÖµÖ»ÄÜÊÇ0¡¢1»ò¿ÕÖµ¡£ÕâÖÖÊý¾ÝÀàÐÍÓÃÓÚ´æ´¢Ö»ÓÐÁ½ÖÖ¿ÉÄÜÖµµÄÊý¾Ý £¬ÈçYes »òNo¡¢True »òFa lse ¡¢On »òOff
int
ÕûÐÍ
int Êý¾ÝÀàÐÍ¿ÉÒÔ´æ´¢´Ó- 231( ......
ÏàÐźܶàASP+MSSQLµÄÍøÕ¾¶¼Óб»ÈË×¢Èë¹ýµÄ¾Àú£¬Êý¾Ý¿â±íÖжàÁËһЩ±í£¬ÀàËÆÒÔϵıíD99_tmp,D99_cmd£¬kill_kk¡£
D99_tmp£¨subdirectory,depth,fileÈý¸ö×ֶΣ¬ÀïÃæµÄÊý¾Ý¶¼ÊÇÍøÕ¾ÎļþºÍĿ¼£©
MSSQLÊý¾Ý¿â´æÔÚ¼¸¸öΣÏÕµÄÀ©Õ¹´æ´¢¹ý³Ì£¬Ä¬ÈÏPublic×é¿ÉÖ´ÐÐȨÏÞ£¬SQL×¢ÈëÕß¿ÉÀûÓô˶ÁÈ¡ÎļþĿ¼¼°Óû§×飬²¢¿Éͨ¹ýÏÈдÈëÊý¾ ......