sqlmap has to find a SQLi. It can't just dump data without knowing anything
about the SQLi. Every SQLi technique has different rules for data dumping.
I would suggest that you run (if you want to be stricter with your given
cases):
python sqlmap.py -u "http://hello.com/index.php?id=1"; --techniqu
Hello!
I have a list of vulners UnionBased urls(example):
http://hello.com/index.php?id=-1+and+union+all+select+1,2,3,[point],4,5--
http://world.com/index.php?page=3+and+union+all+select+1,2,3,4,[point]--
How can i to load one url of this list to sqlmap and dumping structure
of database, withou