Get back-up history from last 30 days.

SELECT
   msdb.dbo.backupset.database_name, 
   msdb.dbo.backupset.backup_start_date, 
   msdb.dbo.backupset.backup_finish_date, 
   CASE msdb..backupset.type 
      WHEN 'D' THEN 'Database' 
      WHEN 'L' THEN 'Log' 
      END AS backup_type, 
   msdb.dbo.backupset.backup_size, 
   msdb.dbo.backupmediafamily.physical_device_name
FROM 
   msdb.dbo.backupmediafamily 
   INNER JOIN msdb.dbo.backupset ON msdb.dbo.backupmediafamily.media_set_id = msdb.dbo.backupset.media_set_id 
WHERE 
   (CONVERT(datetime, msdb.dbo.backupset.backup_start_date, 102) >= GETDATE() - 30) 
ORDER BY
   msdb.dbo.backupset.backup_finish_date