我只想返回一列(per.cd_acao),所以我尝试了类似的东西:
$select->from(array('act' => 'tb_acao'))
->join(array('per' => 'tb_perfil_acao'),
'per.cd_acao = act.cd_acao',
array('cd_acao'),
$select::JOIN_INNER
);
但这会生成一个查询字符串,如: SELECT" act"。*," per"。" cd_acao" AS" cd_acao"来自" tb_acao" AS"行动" INNER JOIN" tb_perfil_acao" AS" per" ON" per"。" cd_acao" ="行为"。" cd_acao"在哪里"每"。" sq_perfil" =' 89'
当我不想要时,它会从第一个表中提取所有列。我在这里缺少什么?
更新
总结:当我没有通知'列'在select对象中,它默认返回所有列给我。但是当我加入时,我不希望第一个表格返回任何列。
答案 0 :(得分:3)
空数组就足够了
$select->from(array('act' => 'tb_acao'))
->columns(array())
->join(array('per' => 'tb_perfil_acao'),
'per.cd_acao = act.cd_acao',
array('cd_acao'),
$select::JOIN_INNER
);
答案 1 :(得分:0)
尝试使用此查询
use Zend\Db\Sql\Sql;
protected $tableGateway;
public $adapter;
public function __construct(TableGateway $tableGateway)
{
$this->tableGateway = $tableGateway;
}
publice function getData(){
$adapter = $this->tableGateway->getAdapter();
$sql = new Sql($adapter);
$select = $sql->select();
$select->from('tb_acao')
->join('per'),
'per.cd_acao = act.cd_acao',
array('cd_acao'),
);
$statement = $sql->prepareStatementForSqlObject($select);
$results = $statement->execute();
return $results;
}