(一)实现方式1：使用游标

执行下面的SQL脚本就可以备份当前数据库实例的所有数据库（除了系统数据库）；

-- =============================================
-- Author:      <听风吹雨>
-- Blog:        
-- Create date: <2011/12/03>
-- Description: <批量备份数据库>
-- =============================================
DECLARE
      @FileName VARCHAR(200),
      @CurrentTime VARCHAR(50),
      @DBName VARCHAR(100),
      @SQL VARCHAR(1000)

SET @CurrentTime = CONVERT(CHAR(8),GETDATE(),112) + CAST(DATEPART(hh, GETDATE()) AS VARCHAR) + CAST(DATEPART(mi, GETDATE()) AS VARCHAR)

DECLARE CurDBName CURSOR FOR 
    SELECT NAME FROM Master..SysDatabases where dbid>4

OPEN CurDBName
FETCH NEXT FROM CurDBName INTO @DBName
WHILE @@FETCH_STATUS = 0
BEGIN
    --Execute Backup
    SET @FileName = 'E:\DBBackup\' + @DBName + '_' + @CurrentTime
    SET @SQL = 'BACKUP DATABASE ['+ @DBName +'] TO DISK = ''' + @FileName + '.bak' +
     ''' WITH NOINIT, NOUNLOAD, NAME = N''' + @DBName + '_backup'', NOSKIP, STATS = 10, NOFORMAT'
    EXEC(@SQL)

    --Get Next DataBase
    FETCH NEXT FROM CurDBName INTO @DBName
END

CLOSE CurDBName
DEALLOCATE CurDBName

未完全转载，更多信息自行到：SQL Server 批量完整备份 了解