Question

我目前正在搞乱mysql。我无法使用此代码mysqli_query($conn, "DELETE FORM amount");删除表“amount”中的所有行。使用该代码，我甚至无法访问我的页面。

$conn = new mysqli(localhost, $username, $password, $database);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$sql = "INSERT INTO freetexts (amount)
VALUES ('3')";

if ($conn->query($sql) === TRUE) {
    echo "New record created successfully";
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$sql = "SELECT amount FROM freetexts";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Amount: " . $row["amount"];
    }
} else {
    echo "0 results";
}
mysqli_query($conn, "DELETE FROM amount");

$conn->close();

Answer 1

更改

mysqli_query($conn, "DELETE FORM amount");

向

mysqli_query($conn, "DELETE FROM amount");

（拼写错误FROM）

我也认为你不想删除表amount中的所有记录，而只是删除表freetexts中找到的记录......所以这意味着你需要改变查询。为了给您提供有关此类内容的进一步建议，请使用表格布局更新您的问题。

Answer 2

BD可能有一个保护，拒绝删除没有条件子句的所有行的命令。

试试这个：TRUNCATE [table_name]

Answer 3

$column = freetexts;

您需要更改

mysqli_query($conn, "DELETE FROM amount");

到

mysqli_query($conn, "DELETE FROM  `$column` WHERE 1");

从表中删除所有行

3 个答案: