sql語法的應用

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ektrontek 2017-01-19 23:07:56 ‧ 3487 瀏覽

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請教大家
語法1會抓出包含哪些文章有被USER點選likes的pageid

select a.*,b.title, b.contenttype from likes a,content b where a.contentid=b.contentid and a.creationdate between '2016/8/1' and '2016/9/1' order by a.creationdate desc

語法2則會抓出屬於同一個樹狀文章的所有pageid

select c1.PAGEID,c1.TITLE,c2.TITLE,c3.TITLE,c4.TITLE 
from CONTENT c1
left outer join CONTENT c2
on c2.PARENTID = c1.CONTENTID
left outer join CONTENT c3
on c3.PARENTID = c2.CONTENTID
left outer join CONTENT c4
on c4.PARENTID = c3.CONTENTID
where c1.PARENTID='43941959'

是否有辦法讓語法1抓出來的pageid讓其自動計算每顆樹狀文章like的總和呢?謝謝