AES_DECRYPT() decrypts the encrypted string and returns the original string.
Encoding with a 128-bit key length is used.
mysql>
mysql> select AES_DECRYPT(AES_ENCRYPT("text","password"),"password") ;
+--------------------------------------------------------+
| AES_DECRYPT(AES_ENCRYPT("text","password"),"password") |
+--------------------------------------------------------+
| text |
+--------------------------------------------------------+
1 row in set (0.00 sec)
mysql>