root@pc1007[parsercache]> select max(exptime), min(exptime) FROM pc000;
+---------------------+---------------------+
| max(exptime)        | min(exptime)        |
+---------------------+---------------------+
| 2019-02-12 08:38:11 | 2019-01-21 01:00:05 |
+---------------------+---------------------+
1 row in set (0.00 sec)