dqq22391 2017-08-01 14:01
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更新查询成功但num_rows返回错误[重复]

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The following is my query:

$sql = "UPDATE `tbl_override_marks` SET final_mark ='$mark', confirmed ='Y' 
        WHERE fk_class_sub_id ='$cls_sub'";

When I give:

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

It gives me trying to get property of non-object in address but the database is updated. Can someone please tell me where I'm going wrong and how to find number of affected rows?

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  • duanhan5230 2017-08-01 14:03
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    I think you are trying to get the number of records get affected. mysql_affected_rows returns the number of rows affected by the last INSERT, UPDATE, REPLACE or DELETE query.

    To check the affected rows use

    $sql = "UPDATE `tbl_override_marks` SET final_mark ='$mark', confirmed ='Y' 
        WHERE fk_class_sub_id ='$cls_sub'";
    $result = $conn->query($sql);
    echo $conn->affected_rows;
    

    You can check the manual mysqli::$affected_rows

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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