Microsoft SQL Server 2012 管理 (2): 实例与数据库管理

1.加密数据库

/*

Module 2 Implementing Transparent Data Encryption

*/



-- 2.1 Create DataBase Master Key

USE Master;

GO



Create Master Key Encryption By Password='SuperKey@currentMachine'

-- The password above must adhere to the windows password policy

-- could also use a hardware encryption module.



-- 2.2 Create a Srever Certificate Derived from Database Master Key

USE master;

GO



Create Certificate TDE_Cert with subject='TDE_Encryption_Cert'



-- 2.3 Create Database Encryption key for a User Database

USE TinyDB

GO



Create Database Encryption Key with Algorithm=AES_256

Encryption by Server Certificate TDE_Cert

-- The are other algorithm choices but AES_256 is the STRONGEST



-- 2.4 Protect User Database

USE TinyDB

GO



Alter Database TinyDB

Set ENCRYPTION ON



-- 2.5 FollowUp

/*

Back up all keys in the hierarchy to a safe place

In practice TEST moving/restoring the database to another instance.

*/

 2. 压缩数据

/*

Implementing Data Compression

*/



Create Database DBWithRedundantData

GO



USE DBWithRedundantData

GO



--Create a Table Assigning Row Compression



Create Table GreatForRowCompression

(

Col1 int

,Col2 char(5)

,Col3 char(3)

,Col4 char(2)

) WITH (DATA_Compression=ROW)



--Create a Table Assigning Page Compression



Create Table GreatForPageCompression

(

Col1 int

,Col2 char(5)

,Col3 char(3)

,Col4 char(2)

) WITH (DATA_Compression=PAGE)



/*

Keep in mind ALTER TABLE and ALTER INDEX can be used 

to implement compression when those obects already exist.

*/

3. 数据库可用性

/*

Change various database option and refresh the Mgmt

*/



-- 2.1 Setup: Add a Table and a couple of rows.

USE TinyDB;

GO



Create Table dbo.T1 (Col1 int Identity, COl2 Varchar(20) default 'T1')

Insert T1 default values

GO 5



-- 2.2 Chnage Avalablity options

Alter database TinyDB

    Set OFFLINE

    -- The Database is Absolutely inaccessible

    --Cleanly shus down the database without having to DETACH

    --Refresh the Databasees node in Mgmt Studio to notice the change



    --Try this query to see what happens... Select * from T1



Alter database TinyDB

    Set EMERGENCY

    -- limited access (Only SysAdmins). This might be useful for 

    -- Transaction Log repairs with DBCC.

        --Try this query to see what happens... Select * from T1



Alter database TinyDB

    Set ONLINE -- The Default Option



Alter database TinyDB

    Set READ_ONLY

    -- Cannot make changes to the database



    -- Try this query to see what happens... UPDATA T1 set Col2='dd' where Col1=1



Alter database TinyDB

    Set READ_WRITE -- the Default Option



Alter database TinyDB

    Set SINGLE_USER

    -- Only one authoritative user can connect to the database

    -- Userd when DBCC CheckD repair_allow_data_loss is used



Alter database TinyDB

    Set RESTRICTED_USER



Alter database TinyDB

    Set MULTI_USER -- the Default Option