Question

我的查询在Phpmyadmin上运行正常，但我尝试将此转换为codeigniter查询类型，我不知道如何使用嵌套查询。所以，我想用普通的SQL格式注入这个查询：

<button class="btn-rd-nav" onclick="ShowSearchDiv()" id="btn-search-home">
   <i id="search-icon" class="fa-search fa fa-lg3 fa-bg"></i>
</button>

<div id="header-search-form" class="search-form slideInUpbox">
  <!----->
  <form method="post" action="search-results.asp?action=kword&keyw=&pg=" id="frmsk" name="frmsk" class="home-search">
    <div class="input-group">
      <input type="text" id="txtsearch" name="txtsearch" placeholder="What are you looking for?">
      <button onClick="javascript:gosearch()" class="btn-search" type="submit"><span class="fa-search fa fa-lg"></span></button>
    </div>
  </form>
</div>

我尝试使用此查询：

select * from conversations c join messages m on m.mconv_num = c.cnum where c.cuser2 = 2 and not exists (select * from messages m2 where m2.mconv_num = m.mconv_num and m2.mtime > m.mtime);

但我有这个错误：

发生数据库错误

$query = 'SELECT * FROM conversations c JOIN messages m ON m.mconv_num = c.cnum WHERE c.cuser2 = 2 AND NOT EXISTS (SELECT * FROM messages m2 WHERE m2.mconv_num = m.mconv_num AND m2.mtime > m.mtime)';
$this->db->query($query);

错误的屏幕截图：https://image.noelshack.com/fichiers/2018/03/5/1516363991-sans-titre.png

因此，如果有人可以帮助我执行我的查询或将此转换为codeigniter格式。谢谢你！

MODEL：

No tables used 
SELECT *

Codeigniter简单的SQL查询

0 个答案: