The absolute path to the database directory is what you need. E.g. if your database is called my.dband lives in C:\users\you\, then:
DATABASE_ENGINE = 'sqlite3'
DATABASE_NAME = 'C:/users/you/my.db'
Refresh
AFAIK . syncdb. . , Django, .
, , Django C:\users\you\myproject\. :
DATABASE_ENGINE = 'sqlite3'
DATABASE_NAME = 'C:/users/you/myproject/my.db'