SQL×Ô¶¯É¾³ý±¸·ÝÎļþ
DECLARE @sql varchar(8000)
--ÏÂÃæÊÇɾ³ý15ÌìÇ°±¸·ÝÎļþµÄ´¦Àí
set @sql='Del E:\Databasebackup\'
@sql=@sql +rtrim(convert(varchar,getdate()-15,112))+'.bak'
Exec master..xp_cmdshell @sql
DECLARE @DelFile Varchar(256)
set @DelFile='Del E:\Databasebackup\'
set @DelFile=@DelFile+'shya_DATA_'+Replace(convert(varchar(10),getdate()-28,120),'-','_')
Exec master..xp_cmdshell @DelFile
--ÅжÏÎļþÊÇ·ñ´æÔÚ
create table ##tb(a bit,b bit,c bit)
DECLARE @sql Varchar(256)
set @sql='E:\Databasebackup'+'shya_DATA_'+Replace(convert(varchar(10),getdate()-28,120),'-','_')
insert into ##tb
exec master..xp_fileexist @sql
--Îļþ´æÔÚÔòɾ³ý
if exists(select 1 from ##tb where a=1)
begin
DECLARE @DelFile Varchar(256)
set @DelFile='Del E:\Databasebackup\'
set @DelFile=@DelFile+'shya_DATA_'+Replace(convert(varchar(10),getdate()-28,120),'-','_')
Exec master..xp_cmdshell @DelFile
end
drop table ##tb
---×îдúÂë
--ÅжÏÎļþÊÇ·ñ´æÔÚ
create table ##tb(a bit,b bit,c bit)
DECLARE @DelFile Varchar(256)
set @DelFile='E:\Databasebackup\'
set @DelFile=@DelFile+'shya_DATA_'+Replace(convert(varchar(10),getdate()-28,120),'-','_')
insert into ##tb
exec master..xp_fileexist @DelFile
--Îļþ´æÔÚÔòɾ³ý
if exists(select 1 from ##tb where a=1)
begin
DECLARE @Delsql Varchar(256)
set @Delsql='Del '+ @DelFile
Exec master..xp_cmdshell @Delsql
end
drop table ##tb
Ïà¹ØÎĵµ£º
C#¡¢ASP.NETÖн«Excel±íÖеÄÊý¾Ýµ¼Èëµ½Sql ServerÊý¾Ý¿âÖжÔÓ¦µÄ±íÖС£
ÕâÀïÎÒÃǽ«E:\test.xls
ÖÐSheet1
±íÖеÄÊý¾Ýµ¼Èëµ½testÊý¾Ý¿âÖеÄmy_test
±íÖС£
Èí¼þ£ºVS2005£¬SQL Server2000,
test.xlsÖÐSheet1±íÖÐÓÐÈý¸ö×ֶΣ¬±àºÅ¡¢Ãû³Æ¡¢±¸×¢¡£¾ßÌåÄÚÈÝÈçÏÂͼ¡£
1¡¢
Ê×ÏÈ£¬ÎÒÃÇÒ ......
¡¾ÎÊÌâÒ»
¡¿£ºÒѾܾø¶Ô OLE DB Ìṩ³ÌÐò 'MICROSOFT.JET.OLEDB.4.0' µÄÌØÊâ·ÃÎÊ¡£±ØÐëͨ¹ýÁ´½Ó·þÎñÆ÷À´·ÃÎÊ´ËÌṩ³ÌÐò¡£
¡¾·ÖÎö
¡¿£ºÕâÊÇÒòΪÄúµ±Ç°ÓÃÀ´·ÃÎÊÊý¾Ý¿âµÄµÇ¼µÄȨÏÞ²»¹»£¨È¨ÏÞÌ«µÍ£©¡£
¡¾½â¾ö
¡¿£ºÒªÃ´Äú»¹ÓÃsaµÇ¼£¬ÒªÃ´Ð޸ĵ±Ç°µÇ¼µÄȨÏÞ£¬²½ÖèÈçÏ£ºÆóÒµ¹ÜÀíÆ÷→°²È«ÐÔ→µÇ¼→ÕÒµ½ÄãËùÓõ ......
ÏÂÃæÊÇÎÒ×ܽá³öÀ´µÄÒ»¸öÊý¾Ý¿â·ÃÎʹ«¹²À࣬»ùÓÚADO.NET£¬C#µÄ£¬ÆäÖУ¬ÒÔÖØÔصķ½Ê½ÊµÏÖʹÓôæÊô¹ý³ÌµÄ½Ó¿ÚºÍ²»Óô洢¹ý³ÌµÄ½Ó¿Ú£¬ÈçÓв»Í×Çë´ó¼ÒÖ¸Õý£¬Ð»Ð»~
×÷Õߣºshinehoo
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
namespace shineh ......
--²éѯӦÓóÌÐòµÄµÈ´ý
SELECT TOP 10
wait_type,waiting_tasks_count AS tasks,
wait_time_ms,max_wait_time_ms AS max_wait,
signal_wait_time_ms AS signal
from sys.dm_os_wait_stats
ORDER BY wait_time_ms DESC
--²éѯÔÚÈÎһʱ¿ÌËùÓÐÊÚȨ¸øµ±Ç°Ö´ÐÐÊÂÎñ»òµ±Ç°Ö´ÐÐÊÂÎñµÈ´ýµÄËø
SELECT
request_session_id A ......
1.Union
UNION Ö¸ÁîµÄÄ¿µÄÊǽ«Á½¸ö SQL Óï¾äµÄ½á¹ûºÏ²¢ÆðÀ´¡£´ÓÕâ¸ö½Ç¶ÈÀ´¿´£¬ UNION ¸ú JOIN ÓÐЩÐíÀàËÆ£¬ÒòΪÕâÁ½¸öÖ¸Á¿ÉÒÔÓɶà¸ö±í¸ñÖÐߢȡ×ÊÁÏ¡£ UNION µÄÒ»¸öÏÞÖÆÊÇÁ½¸ö SQL Óï¾äËù²úÉúµÄÀ¸Î»ÐèÒªÊÇͬÑùµÄ×ÊÁÏÖÖÀà¡£ÁíÍ⣬µ±ÎÒÃÇÓà UNIONÕâ¸öÖ¸Áîʱ£¬ÎÒÃÇÖ»»á¿´µ½²»Í¬µÄ×ÊÁÏÖµ (ÀàËÆ SELECT DISTINCT)¡£
UNION µ ......