#创建表，添加自动更新时间字段
CREATE TABLE `windows` (
`item` varchar(255) DEFAULT NULL,
`updatetime` datetime DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) #######ENGINE=InnoDB DEFAULT CHARSET=gbk;
#添加列
alter table windows add column value decimal(16,2) not null;
#添加自增长列
alter table windows add id int auto_increment primary key
#新建用户并授予相应权限
create user 'monitoruser'@'%' identified by 'EW.3!9zep5j';
grant select,insert,update,delete,create on monitor_data.* to monitoruser;
flush privileges;