symfony2 数据库原生查询

1. 数组,没有键名 但只查询出第一个结果

$conn = $this->getDoctrine()->getConnection();
$data = $conn->fetchArray('SELECT * FROM user where id < 3'); 
// 或者

// $data = $conn->fetchArray('SELECT * FROM user where id < ?', [3]); 

print($data);die;

上面结果是数组

Array
(
    [0] => 1
    [1] => lili
)

2.数组,有键名 但是只查询出第一个结果

$conn = $this->getDoctrine()->getConnection();
$data = $conn->fetchAssoc('SELECT * FROM user where id < 3');
// 或者
// $data = $conn->fetchAssoc('SELECT * FROM user where id < ?', [3]);

print($data);die;

结果:

Array
(
    [id] => 1
    [nickname] => lili
)

3.多个值

$conn = $this->getDoctrine()->getConnection();
$data = $conn->fetchAll('SELECT id,nickname FROM user where id < 3');
print_r($data);die;

结果:

Array
(
    [0] => Array
        (
            [id] => 1
            [nickname] => lili
        ),

　　[1] => Array
        (
            [id] => 1
            [nickname] => lala
        )

)

4.一般不用 显示第一个结果,还是结果的第一个字段

$conn = $this->getDoctrine()->getConnection();
$data = $conn->fetchcolumn('SELECT id,nickname FROM user where id < 3');
print_r($data);die;

结果

1