php - 在 PHP 应用程序中获取“ORA-00979：不是 GROUP BY 表达式”

Question

我用mysql测试它可以工作，但是当我使用Oracle时，出现这个错误：

ORA-00979: 不是 GROUP BY 表达式

这是我的代码：

    <?php
$sqlSelect = "SELECT * FROM policy order by policyprogress_id asc";
if (isset($_GET['batch']) && !empty($_GET['batch'])) {
  $batch = $_GET['batch'];
  $sqlSelect = "SELECT * FROM policy where batch = '".$batch."' group by type order by policyprogress_id asc";
  if (isset($_GET['type']) && !empty($_GET['type'])) {
    $type = $_GET['type'];
    $sqlSelect = "SELECT * FROM policy where batch = '".$batch."' and type = '".$type."' order by policyprogress_id asc";
  }
}

Answer 1

您总共有 3 个查询

-- 1
SELECT * FROM policy order by policyprogress_id asc ;

-- 2
SELECT * FROM policy where batch = '".$batch."' 
group by type order by policyprogress_id asc;

 -- 3
SELECT * FROM policy where batch = '".$batch."' and type = '".$type."' 
order by policyprogress_id asc;

您的第二个查询将在您正在做的SELECT *同时使用GROUP BY TYPE.

在GROUP BY查询中，SELECT子句只能包含分组列和聚合函数。如果您尝试在SELECT子句中使用分组列以外的列，则 Oracle 将抛出ORA-00979: not a GROUP BY expression错误。