SQL Query to Backup all the databases in SQL 2008

 DECLARE @name VARCHAR(50) -- database name   
 DECLARE @path VARCHAR(256) -- path for backup files   
 DECLARE @fileName VARCHAR(256) -- filename for backup   
 DECLARE @fileDate VARCHAR(20) -- used for file name   
 SET @path = 'C:\Backup\'   
 SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112)   
 DECLARE db_cursor CURSOR FOR   
 SELECT name   
 FROM master.dbo.sysdatabases   
 WHERE name NOT IN ('master','model','msdb','tempdb')   
 OPEN db_cursor   
 FETCH NEXT FROM db_cursor INTO @name   
 WHILE @@FETCH_STATUS = 0   
 BEGIN   
 SET @fileName = @path + @name + '_' + @fileDate + '.BAK'   
 BACKUP DATABASE @name TO DISK = @fileName WITH COMPRESSION  
 FETCH NEXT FROM db_cursor INTO @name   
 END   
 CLOSE db_cursor   
 DEALLOCATE db_cursor