Thanks for your reply, SQL is really good,but nothing in the world is perfect, technology is even more so, society is developing, always need the emergence of n

Thanks for your reply, SQL is really good,but nothing in the world is perfect, technology is even more so, society is developing, always need the emergence of new technology, since dare to say so, must have done research to study, and SPL has been studied for 10 years, self-iteration several times, I hope you can try to understand it, thank you!