Query custom meta value - post view and date meta

Question

I am making my first post view counter. I have stored views in post-view meta and latest date meta post_view_last. Now I want to show posts from say last 7 days, last 30 days. My query for last 7 days is below but it's not displaying posts. Basic principle-

1. Query post last 7 days post_view_last

2. Order post based on post views post-view

   $args = array(
   'post_type' => 'post',
   'posts_per_page' => '3',
   'post_status'  =>  'publish',
   'meta_key' => 'post_view',// say 200
   'orderby' => 'meta_value_num',
   'order' => 'DSC',
   'meta_query' => array(
   'relation'  =>   'AND',
      array(
       'key' => 'post_view_last',//2017-04-14
       'value' => date('Y-m-d', strtotime('-7 days')), //value of "order-date" custom field
       'compare' => '<=', //show post less than or equal to today
       'type' => 'CHAR'
     )));
   

Answer 1

@Sadia Please, try this once::

$args = array(
    'post_type' => 'post',
    'posts_per_page' => '3',
    'post_status'  =>  'publish',
    'meta_key' => 'post_view',// say 200
    'orderby' => 'meta_value_num',
    'order' => 'DSC',
    'meta_query' => array(
        'relation'  =>   'AND',
            array(
                'key' => 'post_view_last',//2017-04-14
                'value' => date('Y-m-d', strtotime('-7 days')), //value of "order-date" custom field
                'compare' => '>=', //show post less than or equal to today
            )
        )
);