SQL Server批量备份数据库

 --批量备份数据库201911
 --开启文件夹权限
 GO
 SP_CONFIGURE 'SHOW ADVANCED OPTIONS',1
 RECONFIGURE
 GO
 SP_CONFIGURE 'XP_CMDSHELL',1
 RECONFIGURE
 GO

 DECLARE
       @FileName VARCHAR(200),
       @CurrentTime VARCHAR(50),
       @DBName VARCHAR(100),
       @SQL VARCHAR(1000),
       @FilePath VARCHAR(100)

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

 SET @FilePath = 'E:\DBBak\' + @CurrentTime + '\'
 --select CONVERT(CHAR(8),GETDATE(),112)
 --文件夹不存在，则创建
 declare @TEMP TABLE(A INT,B INT,C INT)--建立虚拟表，用来判断文件夹是否存在
 INSERT @TEMP EXEC [MASTER]..XP_FILEEXIST @FilePath
 IF NOT EXISTS(SELECT * FROM @TEMP WHERE B=1)
 BEGIN
     --XP_CMDSHELL不允许使用变量拼接，所以使用exec方法
     declare @EX NVARCHAR(255)
     SET @EX = 'EXEC XP_CMDSHELL ''MKDIR ' + @FilePath + '''';
     EXEC(@EX)
 END

  --获取所有非系统数据库
 DECLARE CurDBName CURSOR FOR
     SELECT NAME FROM Master..SysDatabases where dbid>4

 --循环备份数据库
 OPEN CurDBName
 FETCH NEXT FROM CurDBName INTO @DBName
 WHILE @@FETCH_STATUS = 0
 BEGIN
     --Execute Backup
     SET @FileName = @FilePath + @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

 /*
 --删除30天之前的备份文件
 --开启文件夹权限
 GO
 SP_CONFIGURE 'SHOW ADVANCED OPTIONS',1
 RECONFIGURE
 GO
 SP_CONFIGURE 'XP_CMDSHELL',1
 RECONFIGURE
 GO
 EXEC xp_cmdshell 'forfiles /p F:\DBBak\ /m * -d -30 /c "cmd /c rd /s /q @path"'
 */