如何從一個表中刪除計數小於？

Question

我有2個表格。

我使用這個查詢來找到一個表在另一個表

select t.id, t.tag_text, count(*) cnt from sms s, template as t 
where s.id_template=t.id 
group by t.tag_text 
order by cnt desc 

場的出現次數的數量如何從模板中刪除所有行，如果他們在短信occure小於5倍的例子嗎？這意味着如果count小於5.我使用MySQL。

Answer 1

delete from template 

where id in 
     (
      select  id_template 
      from  sms 
      group by id_template 
      having  count(*) < 5 
     ) 

Answer 2

可以使用具有過濾彙總結果如：

select t.id, t.tag_text, count(*) cnt 
    from sms s, template as t 
    where s.id_template=t.id 
    group by t.tag_text 
    having count(*) <5 
    order by cnt desc 

和刪除例如：

delete from 
    from sms as s 
    inner join template as t on s.id_template=t.id 
    group by t.tag_text 
    having count(*) <5