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-- 原始数据 select c.system as `系统名`,a.srv_name as `服务`, DATE_FORMAT(a.created_at, '%Y %m') as `发布月份`, a.version as `制品版本` , pc.deploy_cluster_name as `发布集群` , b.`project_name` as `coding项目名称`, b.attribute as `发布特性`, a.created_at as `发布时间`, a.updated_at as `

mysql> explain select * from user where user_id = (select user_id from acticle where article_id = 33) union select * from user where user_id = (select user_id from acticle where article_id = 14) \G...