SQL injections
 

i was doin a small research over the internet about SQL injections since im building a website and i want it to be safe against any kind of hacks. Actually some of u know already about this subject so im here just for some extra info and for the ones that have no idea about it well its kinda interesting!!
As u know behind most of the websites there is a database. This database can be accessed through SQL injections sometimes if the site is vulnerable. Simple injections are done through text inputs, mainly when it comes to login to an account:
The thing is to put ’ OR 1=1-- as a username. the SQL statement will be as followed: SELECT * FROM customers WHERE name = ‘’ OR 1=1--’ AND password = ‘’ we are giving an empty username but we are telling him not to use the username because we have a true statement which is 1=1. so you have to select all rows from the customers table. Well this trick doesn't work on most of the websites so don't bother to try, it was just an info :)

so any other ways that anyone knows about hacking a website through SQL injections?

Such site can't be built.

of course it can't but im doing my best to get all necessary data about the most used techniques and i will try to do my best to make the website as immune as possible

Thanks but first i need the techniques to be able to know how a hacker thinks when hes working on a website so i can be able to build a vulnerable one. so if u know any techniques it would be great to tell us about it.
if u want i can pm you my personal email if u dont want to post it to the public.