php操作mysql示例备忘录

1. 一般的insert

$query = "insert into profile (username) values ('{$username}')";  

$this->db->query($query);  

$userId = sprintf("%d", $this->db->insert_id);  

$this->db->commit();  

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2. 数据库中如果有，则更新，没有则插入

$query = "INSERT INTO BookRead (userId, bookId, count) VALUES ($_userId, $_bookId, 1) ON DUPLICATE KEY UPDATE count = count + 1";  

$this->db->query($query);  

$this->db->commit();  

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3. 更新

$query = "UPDATE Profile Set deviceToken='{$_token}' WHERE userId=$_userId";  

$this->db->query($query);  

$this->db->commit();  

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4.查询1，操作需要操作的字段

$stmt = $this->db->prepare('SELECT userId, passWord FROM Profile WHERE userName=?');  

$stmt->bind_param("s", $_userName);  

$rs = $stmt->execute();  

$stmt->bind_result($_userId, $_passWord);  

while ($stmt->fetch()) {  

 break;  

}  

$stmt->close();  

查询2，返回查询结果数组

$query = "SELECT name, points FROM Profile WHERE 1 ORDER BY points DESC LIMIT $_from, $_to";  

if ($result = $this->db->query($query)) {  

    while ($row = $result->fetch_row()) {  

     $ret = array (  

                "name" => $row[0],  

                "points" => $row[1],  

        );  

    }  

    $result->close();  

}