Codeigniter联接，分组并从一个表计数行

Question

I'm struggling a bit with this code to get the count result from book_listing (totally) which is the total count of bookings. From the result, some are correct but some are multiplied by 3 or so.

Here is my code:

$this->db->where('list_status', 1)
         ->where('list_date >=', date('Y-m-d'))
         ->order_by("user_listings.list_created", "desc")
         ->limit(18, null)
         ->select('*, COUNT(user_bookings.book_listing) as totally')
         ->from('user_listings')
         ->join('user_images', 'user_images.img_listing = user_listings.list_reference')
         ->join('user_states', 'user_states.state_id = user_listings.list_state')
         ->join('user_bookings', 'user_bookings.book_listing = user_listings.list_reference', 'left')
         ->group_by('user_listings.list_reference')
         ->get();

Thanks to any help :)

Answer 1

So I solved it, the user_images table seems to be causing the issue due to multiple images being fetched while I need it to return only one.

$this->db->where('list_status', 1)
         ->where('list_date >=', date('Y-m-d'))
         ->order_by("user_listings.list_created", "desc")
         ->limit(18, null)
         ->select('user_listings.*,image.*,user_states.*')
         ->select('COUNT(user_bookings.book_listing) as totalBooked')
         ->from('user_listings')
         ->join('user_bookings', 'user_bookings.book_listing = user_listings.list_reference', 'left')
         ->join('(SELECT * FROM user_images WHERE user_images.img_key IN(SELECT MIN(user_images.img_key) FROM user_images GROUP BY user_images.img_listing)) AS image',
                                            'image.img_listing = user_listings.list_reference')
         ->join('user_states', 'user_states.state_id = user_listings.list_state')
         ->group_by('user_listings.list_reference')
         ->get();

Basically, I had to do a select from the join table for user_images . Hope it helps someone else :)