Enter Date into SQL Backup Name - tsql

Question

I'm creating a script where it will backup all my DB's in the order I tell it to, but I'd like the backup name to be 'DATABASENAME_TodaysDate.bak'.
I have tried using this T-SQL:
BACKUP DATABASE [DATABASENAME] TO DISK = N'D:\Backups\DatabaseName_getdate()_.bak'
I then realised this wouldn't work as the GETDATE() is inside the apostrophes.

Answer 1

You can move the GETDATE() function outside the apostrophes by using e.g. the function CONCAT(). Example:
BACKUP DATABASE [DATABASENAME] TO DISK = CONCAT('D:\Backups\DatabaseName_', GETDATE(), '_.bak');

Answer 2

The way we do it, is the following:
SELECT #DateString = CAST(DATEPART(YEAR, GETDATE()) AS CHAR(4))
+ RIGHT('0' + CAST(DATEPART(MONTH, GETDATE()) AS VARCHAR(2)), 2)
+ RIGHT('0' + CAST(DATEPART(DAY, GETDATE()) AS VARCHAR(2)), 2);
SELECT #TimeString = RIGHT('0' + CAST(DATEPART(HOUR, GETDATE()) AS VARCHAR(2)), 2)
+ RIGHT('0' + CAST(DATEPART(MINUTE, GETDATE()) AS VARCHAR(2)), 2);
SELECT #SQL = 'BACKUP DATABASE [' + #Database + ']'
+ ' TO DISK = ''' + #BackupDir + '\' + #Database + '_' + #BackupType
+ '_' + #DateString + '_'+ #TimeString + #BackupFileSuffix + ''''
+ ' WITH INIT';
-- Backup Database
BEGIN TRY
EXEC (#SQL);
END TRY
BEGIN CATCH
--do something usefull here like sending an email
END CATCH
It's ugly, i know. But it works for us
EDIT: Because our solution is ugly, here something "not that ugly"
declare #sql varchar (400) = concat('BACKUP DATABASE [DATABASENAME] TO DISK = ''D:\Backups\DatabaseName_', format(GETDATE(), 'yyyy-MM-dd_HHmmss'), '_.bak''');
select #sql