SELECT * FROM rgb6_crawler.spiders_schedule;
#删除一个字段
alter table rgb6_crawler.spiders_schedule DROP COLUMN id;
# 添加新主键
#删除一个字段
alter table rgb6_crawler.spiders_schedule DROP COLUMN id;
# 添加新主键
alter table rgb6_crawler.spiders_schedule add primary key(spider_id);