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plurals

POCounting : multiple queries or one query with multiple subqueries?
primarykey
Id
8397347
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8398113
AnswerCount
5
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CreationDate
2011-12-06T08:58:42.680
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2011-12-09T06:48:45.323
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2011-12-06T09:22:37.513
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ViewCount
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LastEditorDisplayName
text
Body
I want to make a summary script, for example, how many new users are there today, yesterday, this week, last week, this month, last month, so on. I'm using CodeIgniter, so I wonder which one is better? Using multiple calls on models like this : <pre><code>$this->model->get_today_users(); $this->model->get_yesterday_users(); $this->model->get_this_week_users(); // so on </code></pre> Each one of the functions above only return the number of users with specific date range (e.g. SELECT COUNT(*) WHERE join_date=NOW() for today_users , etc - of course using CI active record ). Or is it better having one single query with all necessary subqueries like this : <pre><code>function stats(){ $this->db->select('*'); $this->db->select('(SELECT COUNT(*) FROM users WHERE join_date=NOW()) as today'); $this->db->select('(SELECT COUNT(*) FROM users WHERE join_date=NOW()-INTERVAL 1 DAY) as yesterday'); $this->db->select('(SELECT COUNT(*) FROM users WHERE WEEK(join_date)=WEEK(NOW()) ) as this_week'); $this->db->select('(SELECT COUNT(*) FROM users WHERE WEEK(join_date)=WEEK(NOW())-1 ) as last_week'); $this->db->select('(SELECT COUNT(*) FROM users WHERE MONTH(join_date)=MONTH(NOW()) ) as this_month'); $this->db->select('(SELECT COUNT(*) FROM users WHERE MONTH(join_date)=MONTH(NOW())-1 ) as last_month'); $this->db->from('users'); $ret = $this->db->get(); } </code></pre> and then calling for example $data['stat'] = $this->model->stats(); so in views, I can call $stat->today, $stat->this_week, etc. Thanks in advance for the answers. UPDATE : What if I want to make a function that receives a date? Let's say I have to loop a month like this: <pre><code>//for the sake of simplicity foreach(day in a month as $r){ $this->model->get_user_on_this_day($r); } </code></pre> This means for a 30-day month, it will loop 30 times! Is there any better way than that?
Tags
<mysql><codeigniter>
Title
Counting : multiple queries or one query with multiple subqueries?
singulars
PostAcceptedAnswerId
1. PO
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1. This table or related slice is empty.
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1. PTQuestion
UserLastEditorUserId
1. USHenson
UserOwnerUserId
1. USHenson
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1. This table or related slice is empty.
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1. PO
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2. PO
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3. PO
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