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      3. MySQL SUM 查询问题 php

        MySQL SUM query problems php(MySQL SUM 查询问题 php)
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                2. 本文介绍了MySQL SUM 查询问题 php的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我在 PHP 中运行以下查询:

                  I have the following query running in PHP:

                  $ticketTotal = mysql_query("SELECT SUM(`tickets_issued`) FROM `tb_att_registered_attendants` WHERE `confirmation_code`!='000000'");
                  

                  但是当我返回 $ticketTotal 时,我得到 Resource id #33 并且当我转储变量时,我得到 resource(33) 类型(mysql结果).当我在 phpMyAdmin 中运行完全相同的查询时,我得到了正确的结果.我似乎在谷歌上找不到太多东西.怎么回事?

                  But when I return $ticketTotal, I get Resource id #33 and when I dump the variable, I get resource(33) of type (mysql result). When I run the exact same query in phpMyAdmin, I get the correct result. I can't seem to find much on google. What is going on?

                  提前感谢您的帮助.

                  推荐答案

                  $ticketTotal 不保存您的查询结果.您仍然必须实际获取它们.

                  $ticketTotal doesn't hold your query results. You still have to actually fetch them.

                  while ($row = mysql_fetch_assoc($ticketTotal))
                  {
                      print_r($row);
                  }
                  

                  请不要在新代码中使用 mysql_* 函数.它们不再被维护并被正式弃用.看到 红框?改为了解 准备好的陈述,并使用 PDO 或 MySQLi- 这篇文章将帮助你决定哪一个.如果您选择 PDO,这里有一个很好的教程.

                  Please, don't use mysql_* functions in new code. They are no longer maintained and are officially deprecated. See the red box? Learn about prepared statements instead, and use PDO or MySQLi - this article will help you decide which. If you choose PDO, here is a good tutorial.

                  这篇关于MySQL SUM 查询问题 php的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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