Hi Praveen,
You can refer below thread carefully. You will get idea to take backup using SQL script in DB13.
Important Points.
download SQL script from SAP Note file sp_dumpdb.sql copy it on your OS DB server e.g. to /backup
modified and adapt to your needs e.g. curr_logdev
from command line run sql script
isql -S<YOURDBSID> -Usapsa -i /backup/sp_dumpdb.sql
system will ask for password - it should be master password during installation - I guess
/backup - for Linux if windows provide the path
it will create SP at saptools as you can see at script>
use saptools
go
if not exists (select name from sysobjects where name = 'dump_history' and type = 'U')
begin
exec('create table dump_history (DBName VARCHAR(30), Type VARCHAR(10), Command VARCHAR(512), StartTime DATETIME, EndTime DATETIME, RC INTEGER, Status CHAR(1))')
end
go
if exists (select name from sysobjects where name = 'sp_dumpdb' and type = 'P')
begin
drop procedure sp_dumpdb
end
go
create procedure sp_dumpdb (@sapdb_name varchar (256))
<
So it mean if already you have one, it will run drop, and then create new one - so if you decided to change your backup location, just modified SQL and re-run it
So now you should have at saptools your SP called sp_dumpdb
About the dbacockpit - I am not sure what need to be done, as I always run it from OS level 
Hope now it is more clear.
If I run it from OS level I run those commands
sp_dumpdb <DBSID>
go
Regards,
V Srinivasan
