SQL injection is a web security flaw that allows an attacker to change the SQL queries that are run against the database. This can be used to extract sensitive data such as database structure, tables, and columns, as well as their underlying data.
The following are some examples of SQL injection: You can change a SQL query to return more results when retrieving concealed data. You can alter a query to interfere with the program's logic, which is known as subverting application logic. You can use UNION attacks to retrieve data from many database tables.
A hacker will try to enter specially written SQL instructions into a form field instead of the intended information via SQL injection. The goal is to get a response from the database that will enable the hacker figure out how the database is put together, such as table names.
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