我的SQL命令不起作用

Question

我有两个名为user和submission的表。我想自然地加入他们。然后按列分组。然后选择两列。给他们别名。然后按给定的别名对它们进行排序。

我的代码如下。

select name, count(result) as name, tried from user
natural join submission group by name sort by tried; 

但是，这不起作用。我收到一个错误：

  

1064 - 您的SQL语法出错;查看与MySQL服务器版本对应的手册，以便在第2行“按计数排序（结果）LIMIT 0,30”附近使用正确的语法

Answer 1

您有两个同名的结果：

select name, <-- 1st "anme"
count(result) as name, <-- 2nd name
tried from user natural join submission group by name order by tried; 

修复很简单，因为你需要做的就是更改COUNT

结果的别名

select name, 
count(result) as result_count, 
tried from user natural join submission group by name order by tried; 

Answer 2

select name, 
count(result) as result_count, 
tried from `user` natural join submission group by name ORDER by tried;