Question

我正在使用此查询在数据库中搜索三列的值。在我输入值跨越多个列的查询之前，这种方法非常有效。

例如，如果我输入一个名字和一个公司“ John McDonalds”，结果将返回空白。有没有一种方法可以允许同时搜索多个列？

        string xml = "<Country>MyCountry</Country><Prefecture>MyPrefecture</Prefecture><City>MyCity</City>";
        string wrapped = $"<Address>{xml}</Address>";
        XmlSerializer serializer = new XmlSerializer(typeof(Address));
        Address addr = (Address)serializer.Deserialize(new StringReader(wrapped));

Answer 1

当您要搜索多个术语时，一种选择是拆分传入的$_POST['search']，然后多次搜索数据库。这意味着您的搜索算法复杂度乘以n（字数）。

if (isset($_POST['search']) && $_POST['search'] != '') {
    $search_terms = explode( ' ', $_POST['search'] );
    $results = array();
    foreach( $search_terms as $search_term ) {
        array_push( $results, search_db( $search_term ) );
    }

    header("Content-Type: application/json");
    echo json_encode($result_array);
}

function search_db( $search_term ) {
    global $conn;

    $stmt = $conn->prepare("SELECT * FROM tickets_info WHERE (name LIKE CONCAT('%', ?, '%')) OR (company LIKE CONCAT('%', ?, '%')) OR (ticket LIKE CONCAT('%', ?, '%'))");
    $stmt->bind_param('sss', search_term, search_term, search_term );
    $stmt->execute();

    $result = $stmt->get_result();
    $result_array = array();
    while ($row = $result->fetch_assoc()) {
        array_push($result_array, $row);
    }
    $stmt->close();

    return $result_array;
}

跨多个列搜索数据库

1 个答案: