查询表, 表名含有中横线 - 报错解决方案

select * from "U1-2";

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''SDU1-20210512'' at line 1

问题分析：

     将表名用反斜杠 引用起来查询：    select * from `U1-2`;