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问题是:现在需要统计表table中的num字段全部数据和，并且输出该总值。 统计可以用select sum(num) from table这条sql语句执行，但是问题在于不知道怎么把最终结果读出来？？？有大神指教吗？？
Try setting an alias for the result and you will be able to check it out
$sql = 'select sum(num) AS the_result from table'; $r = $db->query($sql); $r['the_result']; // 想要的结果
$updataquery = "select sum(lv) AS the_result from gti_enews_technology_group" ; $r=$empire->fetch1($updataquery); print_r($r); //打印的结果是Array ( [0] => 252 [the_result] => 252 )
The one upstairs should be fine
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Try setting an alias for the result and you will be able to check it out
The one upstairs should be fine