mysql> select addtime(‘1997-12-31 23:59:52‘ , ‘1 1:1:1‘); +--------------------------------------------+ | addtime(‘1997-12-31 23:59:52‘ , ‘1 1:1:1‘) | +--------------------------------------------+ | 1998-01-02 01:00:53 | +--------------------------------------------+ 1 row in set (0.00 sec)
参考：
https://www.yiibai.com/mysql/mysql_function_addtime.html
原文：https://www.cnblogs.com/sea-stream/p/11299564.html