Why is AES_DECRYPT returning null?

Question

I\'ve found similar questions, but no clear answer for this question. I have this table:

CREATE DATABASE testDB DEFAULT CHARACTER SET utf8 COLLATE utf8_gener         


        

Answer 1

Did you try different values other than 'Testname'? Do other values work?

I ask because I had a situation while testing 2 test credit card numbers where one decrypted fine and the other returned null.

The answer was to hex and unhex as suggested by "abhinai raj"