Hackers can access the information as well as the system of different users through many ways and steal their information or damage their system, and this choice depends on the hackers, and they tend to choose one of the types of hacking methods according to their purpose in order to penetrate the systems, on the other hand, users are trying to increase the security of their system as much as possible to block the way for hackers, one of the steps that they should take, is trying to study articles which are related to security and hacking issues in order to gain mastery and increase awareness in this regard, in this article, we are going to review SQL injection and tell you the important points related to this subject.

What is SQL injection?

Through this attack, hackers can retrieve data which is not visible to the user, and use it in order to achieve their goals, this type of attack is one of the most common ones among hackers, and they use this type of attack to cause a lot of disruption in the users' system, they can even access users’ information and modify or delete it through this way, there have been many reports to date about damage to various systems through this method, and sometimes hackers use it in order to hack web servers as well, in this method, hackers insert a malicious code into the SQL statement through web page input.

Is SQL injection illegal?

In general, any way in which different people can access the users’ information without their permission is illegal, and those who do so will be punished, in this type of attack, if the hackers can carry out the attack completely, they can access a lot of personal information, for instance, bank card information, important personal information, etc., all of which can make a lot of money for hackers, on the other hand, they will compromise user security, the interesting thing about this type of attack is that the users may not be aware of the fact that they have been hacked for a long time, and as a result, during this time, the hacker can continue to steal their important data, as well as accessing more important information day by day, this kind of hacking attack and has different types, among which, the following can be mentioned.

Examples of SQL injection:

- Retrieving hidden data:

Through this way, it is possible for the hacker to access a lot of information which the site owner did not want to share it with applicants, for example, imagine that you enter a site in order to buy a product, and different lists are displayed on the website, in this section, hackers enter a command asking the website to provide more information about the products which are not included in it. 

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