T-SQL Code to backup database with multiple files - Syntax error

Question

Hello,
I'm trying to backup a database into multiple files but I'm getting a syntax error.
Here is the code:
declare @DBName varchar(100)
declare @DBFileName varchar(256)
declare @FolderName varchar(256)
declare @Path varchar(100)
set @Path = '\\Backup-Server\Test\'
set @DBName = 'DayNite'
set @DBFileName = 'DayNite-Full' + '-' + (SELECT CONVERT(char(10), GetDate(),110)) + '-' + 'P'
set @FolderName =(SELECT CONVERT(char(10), GetDate(),110))
set @Path = @Path + @FolderName + '\'
EXEC master.dbo.xp_create_subdir @Path
--Calculate broken files for BACKUP DATBASE Function
/*declare @dbsize int
set @dbsize = (SELECT ((size*8)/1024)/1000 as SizeGB FROM sys.database_files WHERE file_id = '1')
set @dbsize = @dbsize / 4
print @dbsize*/
EXEC
BACKUP DATABASE [test] TO
DISK = @Path + @DBFileName + '1.bak',
DISK = @Path + @DBFileName + '2.bak',
DISK = @Path + @DBFileName + '3.bak',
DISK = @Path + @DBFileName + '4.bak',
DISK = @Path + @DBFileName + '5.bak',
DISK = @Path + @DBFileName + '6.bak',
DISK = @Path + @DBFileName + '7.bak',
DISK = @Path + @DBFileName + '8.bak',
DISK = @Path + @DBFileName + '9.bak',
DISK = @Path + @DBFileName + '10.bak',
DISK = @Path + @DBFileName + '11.bak',
DISK = @Path + @DBFileName + '12.bak',
DISK = @Path + @DBFileName + '13.bak'
WITH INIT , NOUNLOAD , NAME = 'DayNite Full Backup', NOSKIP , NOFORMAT

Answer 1

Made some slight modifications to your script and it should work(worked when tested).. if you wnat more complete solution -- google  -OLA Hallengren backups  -- you should get some good scripts..
declare @DBName varchar(100)
declare @DBFileName varchar(256)
declare @FolderName varchar(256)
declare @Path varchar(100)
set @Path = '\\Backup-Server\Test\'
set @DBName = 'DayNite'
set @DBFileName = 'DayNite-Full' +''+ '-' +''+ (SELECT CONVERT(char(10), GetDate(),110)) +''+ '-' +''+ 'P'
set @FolderName =(SELECT CONVERT(char(10), GetDate(),110))
set @Path = @Path +''+ @FolderName +''+ '\'
EXEC master.dbo.xp_create_subdir @Path
--Calculate broken files for BACKUP DATBASE Function
/*declare @dbsize int
set @dbsize = (SELECT ((size*8)/1024)/1000 as SizeGB FROM sys.database_files WHERE file_id = '1')
set @dbsize = @dbsize / 4
print @dbsize*/
select @Path,@DbFileName
declare @SQL nvarchar(2000)
Set @SQL ='Backup DATABASE [DAYNITE] TO DISK = '''+@Path +''+ @DBFileName +''+ '1.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '2.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '3.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '4.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '5.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '6.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '7.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '8.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '9.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '10.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '11.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '12.bak'',
DISK = '''+@Path +''+ @DBFileName +''+ '13.bak''
WITH INIT , NOUNLOAD , NAME = ''DayNite Full Backup'', NOSKIP , NOFORMAT '
print @SQL
exec (@SQL)
Hope it Helps!!