1、Mysql 让主键归0:TRUNCATE table1;
2、只清空数据表，主键不归0：DELETE FROM table1;
参考：
https://www.csdn.net/gather_2d/MtTaMgxsMjcxMy1ibG9n.html
Mysql让主键归0
原文：https://www.cnblogs.com/sea-stream/p/11297010.html
