对guanglanroadvoltage 表添加随机测试数据的代码，仅支持添加一条数据

 insert into guanglanroadvoltage values(id,floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),CURRENT_TIMESTAMP);

 

 insert into guanglanroadvoltage values(id,floor(rand()*10),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),floor(rand()*50),CURRENT_TIMESTAMP);