Prevents hackers and cares about your security awareness

Hackers often find a good hacker attacking the host on TV or in movies, or getting the first-hand information or being able to control the level. It's so amazing that they really want to be able to enjoy it, however, it seems that this is only exclusive to hackers. Not ordinary people can achieve this. However, the security training on Friday has changed my mind that all hacker attacks depend on existing vulnerabilities, orProgramThe general idea in programming.
For example
Select * from user where id = "1" is very different from select * from user where id = 1. If Id = is used, a door is opened for hackers, in this case, I can add other statements, such as where id = 1 or name = "shangj". If no check is performed, the additional content will be executed, so that I can live some illegal data.
Therefore, a small change may prevent hackers from being able to take advantage of it. Perhaps, when we do not pay attention to programming, we will be tested by hackers and then take the opportunity to do something.
We need to establish a kind of consciousness or a habit. Now, we may feel like we know what we know, but will we leave it behind when we use it? What we need is a kind of consciousness and a kind of habit, rather than an instant understanding.