PHP MySQL-關聯子句不讀取變量

Question

我已經擁有的以下代碼除了一件事情外，完全可以滿足我的需要。

在date(d.added) = '$date'我還需要登錄以等於$date

我試圖將其添加到外部以及WHERE語句中，但似乎無法完全正確

SELECT d.*
FROM data d
WHERE date(d.added) = '$date' AND 
      d.logon = (SELECT MIN(d2.logon) FROM data d2 WHERE d2.name = d.name);

讓我知道您是否需要更多信息

已編輯

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這是當前的樣子，但我不希望它顯示結果，除非添加和登錄的日期相同

$sql = "SELECT d.* FROM data d WHERE date(d.added) = '$date' AND d.logon = (SELECT MIN(d2.logon) FROM data d2 WHERE d2.name = d.name);";

$result = $conn->query($sql);

Answer 1

您嘗試更改：

 '$date'

至

 "$date"

Answer 2

您可以嘗試以下格式嗎？

$query="SELECT d.* FROM data d WHERE date(d.added) = '".$date."' AND d.logon = (SELECT MIN(d2.logon) FROM data d2 WHERE d2.name = d.name)";

您將使用以下格式執行查詢

$result = mysql_query($query);

Answer 3

管理：

SELECT d.* FROM data d WHERE date(d.added) = '$date' AND d.logon = (SELECT MIN(d2.logon) FROM data d2 WHERE d2.name = d.name AND date(d2.logon) = '$date');