I have two tables:
news ->
id_news
title
body
date_created
image
category_id
comments ->
id_comments
news_id
body
date_created
How can I write query to get all news, count all the comments for every news and present that query in the view part?
select
N.ID_News,
N.Title,
N.Body,
N.Date_Created,
N.Image,
N.Category_ID,
count(C.ID_Comments) CommentCount
from
News N
LEFT JOIN Comments C
on N.ID_News = C.News_ID
group by
N.ID_News
order by
whatever column(s) are important to you
Since we are counting, we need to make a minor change to DRap's Query:
select
N.ID_News,
N.Title,
N.Body,
N.Date_Created,
N.Image,
N.Category_ID,
count(C.ID_Comments) CommentCount
from
News N
LEFT JOIN Comments C
on N.ID_News = C.News_ID
order by
whatever column(s) are important to you
That will only give you only one result.. as that query lacks a group by statement, I would recommend changing that query to this:
select
N.ID_News,
N.Title,
N.Body,
N.Date_Created,
N.Image,
N.Category_ID,
count(C.ID_Comments) CommentCount
from
News N
LEFT JOIN Comments C
on N.ID_News = C.News_ID
group by
N.title
order by
whatever column(s) are important to you
Writing this down in the Active Record format stays something like this:
$this->db->select('N.ID_News, N.Title, N.Body, N.Date_Created, N.Image')
$this->db->select('N.Category_ID, count(C.ID_Comments) AS CommentCount');
$this->db->from('News AS N');
$this->db->join('commentas AS C', 'N.ID_News = C.News_ID', 'left');
$this->db->group_by('N.title');
After this you can use the order by funtion, to order the resultsas you seefit.
