本文介绍了使用Zend Db的嵌套选择的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个类似的查询
select empl.idemp ,(select em.firstnm from tbl_employeemaster em where em.idemp = empl.approvedby) as approvedby from tbl_empleaveapplication empl
join tbl_employeemaster emp on empl.idemp = emp.idemp
join tbl_leavemaster lvm on empl.idleavemaster = lvm.idleavemaster
我需要使用zend db来构建这种类型的查询
I need to use zend db to build this type of query
推荐答案
在这里,您可以将字符串查询转换为Zend_Db_Select
Here is how you can convert your string query into Zend_Db_Select
class Empleaveapplication extends Zend_Db_Table_Abstract
{
protected $_name = 'tbl_empleaveapplication';
}
$table = new Empleaveapplication();
// create sub query
$subSql = $table->select()
->setIntegrityCheck(false)
->from(array('em' => 'tbl_employeemaster'), array('firstnm'))
->where('idemp = empl.approvedby', '');
// main query
$sql = $table->select()
->setIntegrityCheck(false)
->from(array('empl' => 'tbl_empleaveapplication'), array('idemp', 'approvedby' => new Zend_Db_Expr('(' . $subSql . ')')))
->joinInner(array('emp' => 'tbl_employeemaster'), 'empl.idemp = emp.idemp', array())
->joinInner(array('lvm' => 'tbl_leavemaster'), 'empl.idleavemaster = lvm.idleavemaster', array());
这篇关于使用Zend Db的嵌套选择的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!