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 create   proc   [dbo].[sp_lockinfo] 
  @kill_lock_spid   bit=0,             --ÊÇ·ñɱµô×èÈûµÄ½ø³Ì,1   ɱµô,   0   ½öÏÔʾ 
  @show_spid_if_nolock   bit=0,   --Èç¹ûûÓÐ×èÈûµÄ½ø³Ì,ÊÇ·ñÏÔʾÕý³£½ø³ÌÐÅÏ¢,1   ÏÔʾ,0   ²»ÏÔʾ 
  @dbname   sysname=''                     --Èç¹ûΪ¿Õ,Ôò²éѯËùÓеĿâ,Èç¹ûΪnull,Ôò²éѯµ±Ç°¿â,·ñÔò²éѯָ¶¨¿â 
  as 
  set   nocount   on 
  declare   @count   int,@s   nvarchar(2000),@dbid   int 
  if   @dbname=''   set   @dbid=db_id()   else   set   @dbid=db_id(@dbname) 
  
  select   id=identity(int,1,1),±êÖ¾, 
  ½ø³ÌID=spid,Ïß³ÌID=kpid,¿é½ø³ÌID=blocked,Êý¾Ý¿âID=dbid, 
  Êý¾Ý¿âÃû=db_name(dbid),Óû§ID=uid,Óû§Ãû=loginame,ÀÛ¼ÆCPUʱ¼ä=cpu, 
  µÇ½ʱ¼ä=login_time,´ò¿ªÊÂÎñÊý=open_tran, ½ø³Ì״̬=status, 
  ¹¤×÷Õ¾Ãû=hostname,Ó¦ÓóÌÐòÃû=program_name,¹¤×÷Õ¾½ø³ÌID=hostprocess, 
  ÓòÃû=nt_domain,Íø¿¨µØÖ·=net_address 
  into   #t   from( 
  select   ±êÖ¾='×èÈûµÄ½ø³Ì', 
  spid,kpid,a.blocked,dbid,uid,loginame,cpu,login_time,open_tran, 
  status,hostname,program_name,hostprocess,nt_domain,net_address, 
  s1=a.spid,s2=0 
  from   master..sysprocesses   a   join   ( 
  select   blocked   from   master..sysprocesses   
  where   blocked>0 
  and(@dbid   is  


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MSSQLµÄ¶à²ãǶÌײéѯ

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Ò»¿ªÊ¼Óï¾äÈçÏÂ×ܳöÏÖ´íÎó£ºÔ­À´ÊÇÔÚ]='123') ºóÎÒ¶à¼ÓÁËÒ»¸ö as tb1
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select * from ( select top(10)  * from ( select top(100)  * from (select  [chatcontent].[senderid],[chatcontent].[id] ,[chatcontent].[toid] ,[chatc ......

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 ......

½²½âMSSQLÊý¾Ý¿âÖÐSQLËø»úÖƺÍÊÂÎñ¸ôÀ뼶±ð

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1. ¿ªÆôÒ»¸öÊÂÎñÖ´ÐвåÈëÊý¾ÝµÄ²Ù×÷¡£
BEGIN TRAN t
INSERT INTO Customer
SELECT 'a','a'
2. Ö´ÐÐÒ»Ìõ²éѯÓï¾ä¡£
SELECT * from Customer WITH (NOLOCK)
½á¹ûÖÐÏÔʾ"a"ºÍ"a"¡£µ±1ÖÐÊÂÎñ»Ø¹öºó£¬ÄÇôa½«³ÉΪÔàÊý¾Ý¡£(×¢:1ÖеÄÊÂÎñδÌá½») ¡£NOLOCK±íÃ÷ûÓжÔÊý¾Ý±íÌí¼Ó¹²Ï ......

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
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id      snm
----------------
111 111V
111 111W
222 222N
333 3123
444 3123
555 3123
666 3232
777 3232
--·Ö×éºóµÄ½á¹û
id &n ......

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= ......
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