大家好我相信这可能会变得微不足道,但我有以下代码
$response = $groupsmapper->getDbTable()->fetchAll(
$groupsmapper->getDbTable()->select('group_area_residence')
->distinct()
应该让我得到所有不同的group_area_residence。但是,它会获取该组的所有列。
我正在使用zend_db_table btw。我该如何解决这个问题?
答案 0 :(得分:2)
根据Zend / Db / Table / Abstract.php中的select(),它检查是否包含from部分,而不是获取字段名称
/**
* Returns an instance of a Zend_Db_Table_Select object.
*
* @param bool $withFromPart Whether or not to include the from part of the select based on the table
* @return Zend_Db_Table_Select
*/
public function select($withFromPart = self::SELECT_WITHOUT_FROM_PART)
{
require_once 'Zend/Db/Table/Select.php';
$select = new Zend_Db_Table_Select($this);
if ($withFromPart == self::SELECT_WITH_FROM_PART) {
$select->from($this->info(self::NAME), Zend_Db_Table_Select::SQL_WILDCARD, $this->info(self::SCHEMA));
}
return $select;
}
查看以下代码段是否有帮助(将table_name替换为所需的代码)
$select = $groupsmapper->getDbTable()
->select()
->distinct()
->from(array('table_name'), array('group_area_residence'));
$response = $groupsmapper->getDbTable()->fetchAll($select);