mysql>
mysql> SELECT MD5('a');
+----------------------------------+
| MD5('a') |
+----------------------------------+
| 0cc175b9c0f1b6a831c399e269772661 |
+----------------------------------+
1 row in set (0.00 sec)
mysql>
mysql> SELECT MD5('A');
+----------------------------------+
| MD5('A') |
+----------------------------------+
| 7fc56270e7a70fa81a5935b72eacbe29 |
+----------------------------------+
1 row in set (0.00 sec)