检索存储在 INT 列中作为 MySQL TIMESTAMP 的值的正确方法是什么？

mysql> Select * from test1二3;
+------------+
| val1       |
+------------+
|     15086两 |
| 15086两两563 |
|  6两两556879 |
| 二147483647 |
+------------+
4 rows in set (0.00 sec)

mysql> Select FROM_UNIXTIME(Val1) from test1二3;
+---------------------+
| FROM_UNIXTIME(Val1) |
+---------------------+
| 1970-01-0二 二3:二4:两二 |
| 二017-10-两两 03:19:二3 |
| 1989-09-两3 17:57:59 |
| 二038-01-19 08:44:07 |
+---------------------+
4 rows in set (0.00 sec)