Mysql 更新并选择最小/最大计数组

Question

我有一个像这样的简单表格:

id  grouped  type_error
--  -------  ------------------ 
1   1-0      TL           
2   1-0      TL           
3   1-0      TL           
4   1-1      TL           
5   1-2      TL      
6   1-2      TL      
7   1-3      TL      
8   1-3      TL      
9   1-3      TL      
10  1-3      TL      

我只想将表格更新为这样:

id  grouped  type_error
--  -------  ------------------ 
1   1-0      FN           
2   1-0      FN           
3   1-0      FN           
4   1-1      TL           
5   1-2      TL      
6   1-2      TL      
7   1-3      FN      
8   1-3      FN      
9   1-3      FN      
10  1-3      FN      

我想更新分组计数最小 3 最大 5 的位置:

我只是有这样的查询:

update errorlog set type_error = 'FN' where id in
(select group_concat(id) as ids from errorlog where ids > 2 group by grouped)

但是，它不起作用。我收到错误

Unknown column 'ids' in 'where clause'

Answer 1

您可以使用以下解决方案，并进行子选择:

UPDATE errorlog SET type_error = 'FN'
WHERE grouped IN (
  SELECT * FROM (
    SELECT grouped 
    FROM errorlog 
    GROUP BY grouped 
    HAVING COUNT(id) BETWEEN 3 AND 5
  )x
);

Here you can find a working demo: http://sqlfiddle.com/#!9/311a01/1/0