遍历文件夹还原数据库SQL语句


/***** 
遍历文件夹进行数据库还原
*******/



---需要开启xp_cmdshell 如已经开启 可以略过
/***** Step 1 开启 xp_cmdshell 
Use Master
GO
EXEC master.dbo.sp_configure 'show advanced options', 1
RECONFIGURE WITH OVERRIDE
GO
EXEC master.dbo.sp_configure 'xp_cmdshell', 1
RECONFIGURE WITH OVERRIDE
GO
*******/


IF OBJECT_ID('tempdb..#files') IS NULL
BEGIN
    --DROP TABLE  #files
    CREATE TABLE #files
    (
    	dbname     VARCHAR(200) NULL,
    	dbsql      VARCHAR(7000) NULL
    )
END

DELETE #files 

IF OBJECT_ID('tempdb..#filelistinfo') IS NOT NULL
    DROP TABLE #filelistinfo

CREATE TABLE #filelistinfo
(
	LogicalName              NVARCHAR(128) NULL,
	PhysicalName             NVARCHAR(260) NULL,
	TYPE                     CHAR(1) NULL,
	FileGroupName            NVARCHAR(128) NULL,
	FileSize                 BIGINT NULL,
	MAXSIZE                  BIGINT NULL,
	FileId                   BIGINT,
	CreateLSN                NUMERIC(25, 0),
	DropLSN                  NUMERIC(25, 0) NULL,
	UniqueID                 UNIQUEIDENTIFIER,
	ReadOnlyLSN              NUMERIC(25, 0) NULL,
	ReadWriteLSN             NUMERIC(25, 0) NULL,
	BackupSizeInBytes        BIGINT,
	SourceBlockSize          INT,
	FileGroupID              INT,
	LogGroupGUID             UNIQUEIDENTIFIER NULL,
	DifferentialBaseLSN      NUMERIC(25, 0) NULL,
	DifferentialBaseGUID     UNIQUEIDENTIFIER,
	IsReadOnly               BIT,
	IsPresent                BIT,
	TDEThumbprint            BIT
)





DECLARE @path VARCHAR(500)
DECLARE @pathData VARCHAR(500)
DECLARE @sql VARCHAR(8000)
DECLARE @bakName VARCHAR(500)
DECLARE @LogicalNameDat VARCHAR(500)
DECLARE @LogicalNameLog VARCHAR(500)
DECLARE @tempCommand VARCHAR(800) 

SET @path = 'E:\DataBak'    ---指定要处理的文件夹
SET @sql = 'dir ' + @path + ' /b'
SET @pathData = 'D:\SqlDataBase' ----数据库还原到的目录
SET @bakName = ''  -----统一的备份名称（不要加.bak），比如固定日期或者可变名，根据自己的路径规则定
  
--获取文件名称，存放在#files
INSERT #files
  (
    dbname
  )
EXEC MASTER..xp_cmdshell @sql

  


--从#files表遍历处理据库数信息，根据备份文件获取数据逻辑名称
						 
DECLARE @dbname VARCHAR(50)
DECLARE curs CURSOR 
FOR
    --定义游标curs
    SELECT dbname
    FROM   #files               
						OPEN curs                       

						FETCH NEXT FROM curs INTO @dbname  

WHILE @@fetch_status = 0 
BEGIN
    SET @bakName = @dbname  --根据自己的路径规则来定
    
    --根据自己路径规则拼接数据库备份文件路径，并执行RESTORE FILELISTONLY
    SET @tempCommand = 'restore filelistonly from disk=''' + @path + '\' +
        @dbname + '\' + @bakName + '.bak'''
    
    PRINT @tempCommand
    
    --将得到数据库的数据存入临时表#filelistinfo
    INSERT INTO #filelistinfo
    EXEC (@tempCommand)
    
    SELECT @LogicalNameDat = LogicalName
    FROM   #filelistinfo
    WHERE [TYPE]= 'D'  --数据库文件
    
    SELECT @LogicalNameLog = LogicalName
    FROM   #filelistinfo
    WHERE [TYPE]= 'L' --日志文件
    
    
    --拼接恢复数据库语句，并更新对应记录到#files
    UPDATE #files
    SET    dbsql = 'RESTORE DATABASE ' + dbname 
           + ' FROM DISK = ''' + @path + '\' + dbname + '\' + @bakName +
           '.bak''' 
           + ' WITH MOVE ''' + @LogicalNameDat + ''' TO ''' + @pathData + '\' +
           dbname
           + '.mdf'','
           + ' MOVE ''' + @LogicalNameLog + ''' TO ''' + @pathData + '\' +
           dbname +
           '_log.ldf'''
    WHERE  dbname = @dbname
    
    --清除#filelistinfo临时表，继续处理下一条记录
    DELETE FROM   #filelistinfo
    
    FETCH NEXT FROM curs INTO @dbname  
END

					CLOSE curs                   
					DEALLOCATE curs
			 


 	
			
			
SELECT *
FROM   #files


--遍历#files表 执行恢复
DECLARE cur CURSOR STATIC LOCAL 
FOR
    SELECT dbsql
    FROM   #files

OPEN cur

WHILE 1 = 1
BEGIN
    FETCH cur INTO @sql
    IF @@fetch_status <> 0
        BREAK
    
    EXEC (@sql)
END

DEALLOCATE cur

DROP TABLE  #files
操作原理：
遍历备份文件，将所有要还原的数据库名称存入#files
通过执行“RESTORE FILELISTONLY”，将结果存入##filelistinfo，从记录中得到备份数据库的库文件及日志文件的逻辑文件名，拼接“RESTORE DATABASE”，并对应更新存入#files表
遍历#files表，执行恢复语句
遍历文件夹还原数据库SQL语句

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