@echo off
setlocal EnableExtensions

rem get unique file name 
:uniqLoop
set "FN=%tmp%\CreateSYSDBA~%RANDOM%.sql"
if exist "%FN%" goto :uniqLoop

echo CONNECT security.db USER SYSDBA; >> "%FN%"
echo CREATE USER SYSDBA PASSWORD 'masterkey'; >> "%FN%"
echo EXIT; >> "%FN%"

isql -i "%FN%"
del "%FN%"

isql -i "%FN%"