`select from（select curdate() as click_date, abs(-32) as id ) a Left joinSelect * from (select curdate() as click_date2, abs(-32) as id) b` 怎么连接起来
小伙看你根骨奇佳，潜力无限，来学PHP伐。
No weight removal
a union all b
Duplicate removal
a union b
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
No weight removal
Duplicate removal