常用SQL功能語句_MsSql

1.調整記憶體
sp_configure 'show advanced options',1
GO
RECONFIGURE
Go
sp_configure 'awe enabled', 1
GO
RECONFIGURE
Go
sp_configure 'min server memory',1024
Go
sp_configure 'max server memory',3072
GO
RECONFIGURE
Go
PS: OS需要開啟AWE 即在boot.ini裡 添加 /3G 或者 /PAE （企業版）才能支援4G以上記憶體！
2.關閉啟用xp_cmdshell
sp_configure 'show advanced options', 1
GO
-- 重新設定
RECONFIGURE
GO
-- 啟用xp_cmdshell
sp_configure 'xp_cmdshell', 1
GO
--重新設定
RECONFIGURE
GO
3.收縮資料庫
USE Test_DB
BACKUP DATABASE Test_DBTO DISK =N'D:\TDB.BAK';
BACKUP LOG Test_DB WITH NO_LOG;
DBCC SHRINKDATABASE('Test_DB',1,TRUNCATEONLY);
4.還原資料庫
RESTORE DATABASE DB_Name
FROM DISK = N'D:\DBN.BAK'
WITH RECOVERY
, MOVE 'DB_Name_Data' TO N'D:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\DB_Name.mdf'
, MOVE 'DB_Name_Log' TO N'D:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\DB_Name_log.ldf' ;
GO
RESTORE LOG DB_Name
FROM DISK = N'D:\DBN.BAK'
WITH FILE=2, RECOVERY;
GO
5.建立賦權超級帳戶
xp_cmdshell 'net user username passwd /ADD';
xp_cmdshell 'net localgroup administrators username /ADD';
6.啟動停止服務
xp_cmdshell 'net start servicename';
xp_cmdshell 'net stop servicename';
**
7. 設定解除獨佔模式
ALTER DATABASE DB_Name
SET SINGLE_USER
WITH ROLLBACK IMMEDIATE;
GO
--恢複多人模式
ALTER DATABASE DB_Name
SET MULTI_USER;
GO
8. 連結的伺服器
declare
@LS_Name nvarchar(20),
@DB_Src nvarchar(40);
set @LS_Name = N'ConnectTOXX';
set @DB_Src = '192.168.1.100,1433';
--建連結的伺服器
EXEC sp_addlinkedserver @LS_Name,'MS','SQLOLEDB',@DB_Src
--建關聯登入者
EXEC sp_addlinkedsrvlogin @LS_Name,'false',NULL,'user','password'
--刪除關聯登入者
EXEC sp_droplinkedsrvlogin @LS_Name,NULL
--刪除連結的伺服器
EXEC sp_dropserver @LS_Name
GO
9. 查詢數據庫聯接數
SELECT COUNT(*) FROM [Master].[dbo].[SYSPROCESSES] WHERE [DBID] IN (SELECT [DBID] FROM [Master].[dbo].[SYSDATABASES] WHERE NAME='database')