自己亲自做的drupal6的方法 有大用 下面的第一种方法 和第二种方法 可以忽略不看

//目的很明确 ,就是 add_where 增加一个组

function shipingzhongcustom_views_query_alter(&$view, &$query)
{
   if ($view->name == 'allcontentview' && $view->current_display=='page_33') {
      $query->add_where(1, "node_data_field_is_baoming.field_is_baoming_value IS NULL or node_data_field_is_baoming.field_is_baoming_value  <> '是' ");
      $query->add_where(1, "node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ");
      $query->set_where_group('OR', 1);
      $query->add_where(2, "node_data_field_is_dingjing.field_is_dingjing_value IS NULL or node_data_field_is_dingjing.field_is_dingjing_value  <> '是' ");
      $query->add_where(2, "node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ");
      $query->set_where_group('OR', 2);
   }
}

上门未报名的条件相当于 

where (DATE_FORMAT(ADDTIME(node_data_field_shangmeng_time.field_shangmeng_time_value, SEC_TO_TIME(28800)), '%Y-%m-%d') <= '2017-02-20')    
AND ((node_data_field_is_shangmen.field_is_shangmen_value = '是') AND (node.type in ('kefuchat')))  
  AND ((node_data_field_is_baoming.field_is_baoming_value IS NULL or node_data_field_is_baoming.field_is_baoming_value  <> '是' ) OR (node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ))  
  AND ((node_data_field_is_dingjing.field_is_dingjing_value IS NULL or node_data_field_is_dingjing.field_is_dingjing_value  <> '是' ) OR (node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ))

function shipingzhongcustom_views_query_alter(&$view, &$query)

{

   if ($view->name == 'allcontentview' && $view->current_display=='page_33') {
      //$export = kprint_r($query->where, TRUE); // $vars - is a variable which you want to print.
      //print $export;
      //$query->add_where(1, "node_data_field_is_baoming.field_is_baoming_value IS NULL and node_data_field_is_dingjing.field_is_dingjing_value IS NULL ");
      $query->add_where(1, "node_data_field_is_baoming.field_is_baoming_value IS NULL or node_data_field_is_baoming.field_is_baoming_value  <> '是' ");
      $query->add_where(1, "node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ");
      $query->set_where_group('OR', 1);
      $query->add_where(2, "node_data_field_is_dingjing.field_is_dingjing_value IS NULL or node_data_field_is_dingjing.field_is_dingjing_value  <> '是' ");
      $query->add_where(2, "node_data_field_xueshenname.field_is_zx_shangmen_value = '是' ");
      $query->set_where_group('OR', 2);
      //$export = kprint_r($query->where, TRUE);
      //print $export;
   }

   if ($view->name == 'allcontentview' && $view->current_display=='page_3') {



      //这里判断是否有值为 empty 如果有的话 就移除它 field_yixiangzhuanye_select_value  再增加一个 其值 为 is null 或 ''
      //这个empty 是哪里设置的呢 是 本文件约 1615行进行 form_alter 设置的
      foreach($query->where[0]['args'] as $key=>$value){
         if($value=='empty' && stristr($query->where[0]['clauses'][$key],'field_yixiangzhuanye_select_value')){
            $export = kprint_r($query, TRUE); // $vars - is a variable which you want to print.
            print $export;
             $query->add_where(0, "node_data_field_yixiangzhuanye_select.field_yixiangzhuanye_select_value IS NULL or node_data_field_yixiangzhuanye_select.field_yixiangzhuanye_select_value='' ");
            unset($query->where[0]['args'][$key]);
            unset($query->where[0]['clauses'][$key]);
         };
//       if($value=='empty' && stristr($query->where[0]['clauses'][$key],'field_yixiangzhuanye_select_value')){
//          unset($query->where[0]['args'][$key]);
//          unset($query->where[0]['clauses'][$key]);
////            //注意这里的字段啊 是 node_data_field_xueshenname_field_yixiangzhuanye_select_value 从 dsm($query)可以看出来这个对象的fields字段
//          $query->add_where(1, "node_data_field_xueshenname_field_yixiangzhuanye_select_value.field_yixiangzhuanye_select_value IS NULL or node_data_field_xueshenname_field_yixiangzhuanye_select_value.field_yixiangzhuanye_select_value='' ");
//          //$query->add_where(1, "node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value IS NULL or node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value='' ");
//          $query->set_where_group('AND', 1);
//
////            $query->where[0]['clauses'][$key] = " (node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value IS NULL) or (node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value='') ";
//////          $query->where[0]['clauses'][$key] = "node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value = '%s'";
////            unset($query->where[0]['args'][$key]);
//
//       }
      }
//    $query->add_where(1, "node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value IS NULL or node_data_field_yixiangzhuanye_select_value_0.field_yixiangzhuanye_select_value='' ");
//    $query->set_where_group('AND', 1);
//    $export = kprint_r($query,TRUE); // $vars - is a variable which you want to print.
//    print $export;


   }
}

第一种方法 
Views Filtergroup
来自  https://www.drupal.org/project/views_filtergroup

第二种方法

add_where. For example see the sample code

function mymodule_views_query_alter(&$view, &$query) {
  if ('yourviewname' == $view->name && 'page' == $view->current_display) {
    $weight_parent = array(29,31);
    $or = db_or()
    ->condition('taxonomy_term_data_taxonomy_term_hierarchy.weight', 'NULL', 'IS')
    ->condition('taxonomy_term_data_node.weight', $weight_parent, 'IN');
    $query->add_where(1,$or);
  }
}

This will create an OR in among two WHERE clauses. Now you can enable 'Show the SQL query in view settings(admin/structure/views) then you can check the updated query at the bottom of view settings page(admin/structure/views/view/your_view_name).
这将创建一个或两个WHERE子句中。现在，您可以启用“显示视图设置（管理/结构/人次）的SQL查询，那么你可以在视图设置页面（管理/结构/视图/视图/ your_view_name）的底部检查更新的查询。

"old query" AND ((taxonomy_term_data_taxonomy_term_hierarchy.weight IS 'NULL') OR (taxonomy_term_data_node.weight IN  ('29', '31')))

Similarly you can use db_and to add AND condition. Hope this helps someone out there. Thanks!
同样，您可以使用db_and添加和条件。希望这有助于有人在那里。谢谢！

来自 http://www.zyxware.com/articles/3886/drupal-how-to-use-or-clause-in-hook-view-query-alter-in-drupal-7


 

# 为什么我自己写的sql 要用 '%Y-%m-%%d' (为什么要用两上百分号d)
select c_t_xiaonenzhibantime.nid,    
count(field_xnzbt_start_time_value) as date_cou,    
DATE_FORMAT(ADDTIME(field_xnzbt_start_time_value, SEC_TO_TIME(28800)), '%Y-%m-%%d') as date_one    
from content_type_xiaonenzhibantime c_t_xiaonenzhibantime    
inner join content_field_xnfx_person  c_f_xnfx_person on c_f_xnfx_person.nid=c_t_xiaonenzhibantime.nid  where  
field_xnzbt_start_time_value>='2019-07-01' 
 and field_xnzbt_end_time_value<='2019-07-04 00:00:00'  
group by DATE_FORMAT(ADDTIME(field_xnzbt_start_time_value, SEC_TO_TIME(28800)),
'%Y-%m-%%d') order by field_xnzbt_start_time_value asc    

难道是因为 public_html/sites/all/modules/views/includes/handlers.inc 这个里面对mysqli的%d进行了处理?