how to take backup of database in sql server code example

Example 1: sql server backup database

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
 
-- specify database backup directory
SET @path = 'V:\SQL_Backup\01_Diaria\'  
 
-- specify filename format
SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112) 
 
DECLARE db_cursor CURSOR READ_ONLY FOR  
SELECT name 
FROM master.sys.databases 
WHERE name NOT IN ('master','model','msdb','tempdb')  -- exclude these databases
AND state = 0 -- database is online
AND is_in_standby = 0 -- database is not read only for log shipping
 
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 INIT, COMPRESSION
 
   FETCH NEXT FROM db_cursor INTO @name   
END   

 
CLOSE db_cursor   
DEALLOCATE db_cursor

Example 2: t-sql backup names

SELECT CONVERT(CHAR(100), SERVERPROPERTY('Servername')) AS Server,
       b.database_name,
       b.backup_start_date,
       b.backup_finish_date,
       b.expiration_date,
       CASE b.type
           WHEN 'D' THEN 'Database'
           WHEN 'L' THEN 'Log'
       END AS backup_type,
       b.backup_size,
       a.logical_device_name,
       a.physical_device_name,
       b.name,
       b.description
FROM msdb.dbo.backupmediafamily a
INNER JOIN msdb.dbo.backupset b
    ON a.media_set_id = b.media_set_id
ORDER BY b.database_name,
         b.backup_finish_date DESC;