Question

我无法从列数据中读取记录，为什么？代码：

$_query = mysqli_query($mysqli , "SELECT  o.id,o.surname,o.name,so.data FROM mowcy AS o
          LEFT JOIN zeb AS so ON so.id=o.id AND so.mowca=o.mowca 
           WHERE 
             o.archiwum = 0 
             AND o.id<>1
             AND o.mowca = 3

              GROUP BY o.id
               ORDER BY ISNULL(o.id) desc, MAX(so.data) ") 
                or die(mysqli_error($mysqli));

显示错误：

list不在GROUP BY子句中，包含非聚合列 'rafik73_tereny.so.data'在功能上不依赖于 GROUP BY子句中的列;这是不相容的的sql_mode = only_full_group_by

Answer 1

试试这个;

SELECT  o.id,MAX(so.data) FROM mowcy AS o
          LEFT JOIN zeb AS so ON so.id=o.id AND so.mowca=o.mowca 
           WHERE 
             o.archiwum = 0 
             AND o.id<>1
             AND o.mowca = 3
              GROUP BY o.id
               ORDER BY ISNULL(o.id) desc, MAX(so.data)

由于在您的查询中对某些内容进行分组时错误会指向您，您应该只选择分组字段和聚合列。

左连接组由max - 如何读取记录

1 个答案: