大家對本人之前的文章《恢復SQL Server被誤刪除的資料》 反應非常熱烈，但是文章裡的儲存過程不能實現對備份出來的日誌備份裡所刪資料的恢復

這個是一個缺陷，本人決定對這個儲存過程擴充套件一下，支援對log backup檔案裡的delete語句進行恢復

 原文來自：http://www.cnblogs.com/lyhabc/p/4620764.html

實驗步驟

1、首先先準備好測試表和測試語句

USE [sss]
GO

--建表
CREATE TABLE testdelete
    (
      id INT IDENTITY(1, 1)
             
 
NOT NULL
             PRIMARY KEY ,
      NAME VARCHAR(200) ,
      dt DATETIME
    )


--插入資料
INSERT  [dbo].[testdelete]
        ( [NAME], [dt] )
VALUES  ( 'aa', -- NAME - varchar(200)
          '2015-07-04 07:06:40'  -- dt - datetime
          )




SELECT  *  FROM    [dbo].[testdelete]


--刪除資料
DELETE  FROM
 
 [dbo].[testdelete]

2、刪除資料之後對資料庫進行日誌備份

DECLARE @CurrentTime VARCHAR(50) ,
    @FileName VARCHAR(200)
SET @CurrentTime = REPLACE(REPLACE(REPLACE(CONVERT(VARCHAR, GETDATE(), 120),
                                           '-', '_'), ' ', '_'), ':', '')  
SET @FileName = 'c:\sss_logBackup_' +
 
 @CurrentTime + '.bak'
BACKUP LOG  [sss]
TO DISK=@FileName WITH FORMAT 

4、建立儲存過程

-- Script Name: Recover_Deleted_Data_BylogBackup_Proc
-- Script Type : Recovery Procedure 
-- Develop By: Steven Lam
-- Date Created: 03 July  2015
-- Version    : 1.0
-- Notes : Included BLOB data types for recovery.& Compatibile with Default , CS collation , Arabic_CI_AS.
 
USE [sss]
GO


CREATE PROCEDURE Recover_Deleted_Data_BylogBackup_Proc
    @Database_Name NVARCHAR(MAX) ,
    @SchemaName_n_TableName NVARCHAR(MAX) ,
    @Backuppath NVARCHAR(2000),
    @Date_From DATETIME = '1900/01/01' ,
    @Date_To DATETIME = '9999/12/31' 
   
AS
    DECLARE @RowLogContents VARBINARY(8000)
    DECLARE @TransactionID NVARCHAR(MAX)
    DECLARE @AllocUnitID BIGINT
    DECLARE @AllocUnitName NVARCHAR(MAX)
    DECLARE @SQL NVARCHAR(MAX)
    DECLARE @Compatibility_Level INT

    IF ( @Backuppath IS NULL
         OR @Backuppath = ''
       )
        BEGIN
            RAISERROR('The parameter @Backuppath can not be null!',16,1)
            RETURN
        END


 
    SELECT  @Compatibility_Level = dtb.compatibility_level
    FROM    master.sys.databases AS dtb
    WHERE   dtb.name = @Database_Name
 
    IF ISNULL(@Compatibility_Level, 0) <= 80
        BEGIN
            RAISERROR('The compatibility level should be equal to or greater SQL SERVER 2005 (90)',16,1)
            RETURN
        END
 
    IF ( SELECT COUNT(*)
         FROM   INFORMATION_SCHEMA.TABLES
         WHERE  [TABLE_SCHEMA] + '.' + [TABLE_NAME] = @SchemaName_n_TableName
       ) = 0
        BEGIN
            RAISERROR('Could not found the table in the defined database',16,1)
            RETURN
        END
 
    DECLARE @bitTable TABLE
        (
          [ID] INT ,
          [Bitvalue] INT
        )
--Create table to set the bit position of one byte.
 
    INSERT  INTO @bitTable
            SELECT  0 ,
                    2
            UNION ALL
            SELECT  1 ,
                    2
            UNION ALL
            SELECT  2 ,
                    4
            UNION ALL
            SELECT  3 ,
                    8
            UNION ALL
            SELECT  4 ,
                    16
            UNION ALL
            SELECT  5 ,
                    32
            UNION ALL
            SELECT  6 ,
                    64
            UNION ALL
            SELECT  7 ,
                    128
 
--Create table to collect the row data.
    DECLARE @DeletedRecords TABLE
        (
          [Row ID] INT IDENTITY(1, 1) ,
          [RowLogContents] VARBINARY(8000) ,
          [AllocUnitID] BIGINT ,
          [Transaction ID] NVARCHAR(MAX) ,
          [FixedLengthData] SMALLINT ,
          [TotalNoOfCols] SMALLINT ,
          [NullBitMapLength] SMALLINT ,
          [NullBytes] VARBINARY(8000) ,
          [TotalNoofVarCols] SMALLINT ,
          [ColumnOffsetArray] VARBINARY(8000) ,
          [VarColumnStart] SMALLINT ,
          [Slot ID] INT ,
          [NullBitMap] VARCHAR(MAX)
        )
--Create a common table expression to get all the row data plus how many bytes we have for each row.
;
    WITH    RowData
              AS ( SELECT   [RowLog Contents 0] AS [RowLogContents] ,
                            [AllocUnitID] AS [AllocUnitID] ,
                            [Transaction ID] AS [Transaction ID]  
 
--[Fixed Length Data] = Substring (RowLog content 0, Status Bit A+ Status Bit B + 1,2 bytes)
                            ,
                            CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              2 + 1, 2)))) AS [FixedLengthData]  --@FixedLengthData
 
-- [TotalnoOfCols] =  Substring (RowLog content 0, [Fixed Length Data] + 1,2 bytes)
                            ,
                            CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              2 + 1, 2)))) + 1,
                                                              2)))) AS [TotalNoOfCols]
 
--[NullBitMapLength]=ceiling([Total No of Columns] /8.0)
                            ,
                            CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              2 + 1, 2)))) + 1,
                                                              2)))) / 8.0)) AS [NullBitMapLength] 
 
--[Null Bytes] = Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [NullBitMapLength] )
                            ,
                            SUBSTRING([RowLog Contents 0],
                                      CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              2 + 1, 2)))) + 3,
                                      CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              2 + 1, 2)))) + 1,
                                                              2)))) / 8.0))) AS [NullBytes]
 
--[TotalNoofVarCols] = Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [Null Bitmap length] + 2 )
                            ,
                            ( CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN (
                                        0x10, 0x30, 0x70 )
                                   THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0],
                                                              CONVERT(SMALLINT, CO