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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 KeyUSE Master;GOCreate 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 KeyUSE master;GOCreate Certificate TDE_Cert with subject=‘TDE_Encryption_Cert‘-- 2.3 Create Database Encryption key for a User DatabaseUSE TinyDBGOCreate Database Encryption Key with Algorithm=AES_256Encryption by Server Certificate TDE_Cert-- The are other algorithm choices but AES_256 is the STRONGEST-- 2.4 Protect User DatabaseUSE TinyDBGOAlter Database TinyDBSet ENCRYPTION ON-- 2.5 FollowUp/*Back up all keys in the hierarchy to a safe placeIn practice TEST moving/restoring the database to another instance.*/
2. 压缩数据
/*Implementing Data Compression*/Create Database DBWithRedundantDataGOUSE DBWithRedundantDataGO--Create a Table Assigning Row CompressionCreate Table GreatForRowCompression(Col1 int,Col2 char(5),Col3 char(3),Col4 char(2)) WITH (DATA_Compression=ROW)--Create a Table Assigning Page CompressionCreate 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;GOCreate Table dbo.T1 (Col1 int Identity, COl2 Varchar(20) default ‘T1‘)Insert T1 default valuesGO 5-- 2.2 Chnage Avalablity optionsAlter 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 T1Alter 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 T1Alter database TinyDB Set ONLINE -- The Default OptionAlter 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=1Alter database TinyDB Set READ_WRITE -- the Default OptionAlter database TinyDB Set SINGLE_USER -- Only one authoritative user can connect to the database -- Userd when DBCC CheckD repair_allow_data_loss is usedAlter database TinyDB Set RESTRICTED_USERAlter database TinyDB Set MULTI_USER -- the Default Option
Microsoft SQL Server 2012 管理 (2): 实例与数据库管理
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