Question

你好我的问题是如何从数据库中获取最近12个月的记录，如果任何月份没有任何记录，那么它应该将月份值返回为0。所以如何做到这一点可以帮助我解决这个问题。

我尝试了以下查询，但它只返回那些有记录的月份记录。

$query =  $this->db->select('count(*) as count,MONTHNAME(created_at) as months,MONTH(created_at) as month')
                       ->where('created_at >= DATE_SUB(now(), INTERVAL 12 MONTH)')
                       ->group_by('months')
                       ->order_by('month')
                       ->get('users');

Answer 1

SELECT * FROM tbl 
WHERE dt >=DATEADD(month,-12,DATEADD(day,DATEDIFF(day,0,GETDATE()),0)) 
AND dt <=DATEADD(day,DATEDIFF(day,0,GETDATE()),0)

请参阅以下链接：

SQL function for last 12 months

Answer 2

试试这个..

$query = "SELECT * FROM `tablename` WHERE date > DATE_SUB(NOW(), INTERVAL 12 MONTH) AND `id`='$id'";

Answer 3

试试这个

# get current Year and month
$currentYear = date("Y");
$currentMonth = date("m");

# set that to filter
$startDate = $currentYear.'01-01'; // output - 2015-01-01
$endDate = $currentYear.'-'.$currentMonth.'-31'; // output - 2015-currentMonth-31

# and your query should be this
$query = $this->db->query(
    "SELECT count(distinct u.id) as monthCount
    FROM users as u
    WHERE created_at >= $startDate 
    AND created_at >= $endDate 
    GROUP BY monthCount
    ");

$result = $query->result_array();
return $result;

如何从数据库获取最近12个月的记录

3 个答案: