Question

我在mysql表中有2行。一些数据在行中重复，有些数据在同一行中重复。我想回应每一个独特的价值。

数组如下所示：

Array ( [0] => Array ( [Character1] => Moe Szyslak [Character2] => 0 ) [1] => Array ( [Character1] => Homer Simpson [Character2] => 0 ) [2] => Array ( [Character1] => Homer  Simpson [Character2] => ) [3] => Array ( [Character1] => Homer Simpson [Character2] => Marge Simpson )

尝试了各种各样的事情，foreach's结合了array_unique等，但没有什么比这更接近所以我想我必须离开。预期的结果是： Moe Szyslak Homer Simpson Marge Simpson

编辑：查询是在CI模型中（是的，我的数据库结构应该更好）：

function getCharacter()
{
$query = $this->db->query("SELECT DISTINCT Character1, Character2 FROM clip");
return $query->result_array();
}

Answer 1

你可以从表中选择“select distinct *”来删除欺骗吗？

另一种选择是检查数组中的前一个值：

for ($i = 0; $i < count($array); $i++)
{
    if ($i == 0 || $array[$i]->Character1 != $array[$i - 1]->Character1)
    {
        echo $array[$i]->Character1 ."<br />";
    }
}

Answer 2

使用DISTINCT Character1, Character2只会清除包含相同Character1和Character2的行。因此，对于以下数据，将返回三行 - 第2行，第4行和第1行（第1行和第3行）

Character1    | Character2
-----------------------------
Moe Szyslak   | Homer Simpson 
Marge Simpson | Moe Szyslak 
Moe Szyslak   | Homer Simpson 
Moe Szyslak   | Marge Simpson

使用以下代码获取唯一值

$charaters = array();
foreach ($charater_arr as $charater_arr) {
  if (!in_array($charater_arr['Character1'], $charaters)) {
    $charaters[]  = $charater_arr['Character1'];
  }
  if (!in_array($charater_arr['Character1'], $charaters)) {
    $charaters[]  = $charater_arr['Character2'];
  }
}
print_r($charaters);

否则请尝试以下查询。

SELECT Character1 AS character FROM clip 
UNION
SELECT Character2 AS character FROM clip

循环2行，合并并删除重复项

2 个答案: