What should i learn? sql or sqli

Answer 1

SQL and SQLI are the same thing.
SQL (Structured Query Language)
SQLI (Structured Query Language Injection)
they are edited the same way with the same input. they both use the same language. if you learn one... you learn both.

Answer 2

forget about sql and sqli.
Go with PDO Connection.

Answer 3

I have never heard of PDO

Answer 4

Try to study it then 😅

Answer 5

ok thanks