從CakePHP中

Question

兩個數據庫的數據進行比較，我想寫在CakePHP中執行以下操作：

(select email 
from membersdatabase 
where memberid not in 
    (select memberid from deregisteredmembers) 

Answer 1

從membersdatabase的模型，編寫下面的查詢：

$options = array(
     'conditions' => array('deregisteredmembers.memberid is null'), 
     'joins' => array(
      array(
       'alias' => 'deregisteredmembers', 
       'table' => 'deregisteredmembers', 
       'type' => 'LEFT', 
       'conditions' => array(
        'deregisteredmembers.memberid = membersdatabase.id', 
       ), 
      ) 
     ), 
     'fields' => array('membersdatabase.email') 
    ); 

$this->find('all',$options); 

你會得到期望的結果