Who hacked my website or my database? is it by kali linux or sql database attack ?

As an expert (CISSP, CEH and CHFI - certified hacking forensic investigator) - I believe my answer would give you the best perspective from a professional who investigates hacked websites all the time.

You should obtain the web server logs - but not just from the time of the attack, go one week back.

Then remove from the logs (using basic filtering) all the legitimate activity - say, start from the pages which are accessed only for legitimate purposes and remove them from the logs. Go deeper until you are left just with nefarious activities.

You will get a list of IP addresses - investigate these.

Keep in mind though, that hackers often use proxies.

In this case, you should keep in mind that hackers also do what they do for a purpose. If your data was valuable, someone paid to get it "taken" - think who might have ordered this, maybe a competitor? And sometimes it might be someone trying to get at you.

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