按計數計數的SQL組

Question

這是我的劇本

SELECT COUNT( [Id]) as [Count Of Register],
Tag as [Tag]
FROM [Members]
Group By Tag 
Order By [Count Of Register] Desc;

返回表是這樣的：

Count   Tag

550 ----1
550 ----2
545 ----3
545 ----4
545 ----5

所以，這次我需要Count of Tag，Group by這個新的Count字段。

一些返回值如：

2 ---550
3 ---545

有沒有辦法不使用新表或模板表或任何存儲表只是通過查詢？

Answer 1

SELECT [Count Of Register], COUNT(1) [Grouped Count]
FROM
(
    SELECT COUNT( [Id]) as [Count Of Register],
           Tag as [Tag]
    FROM [Members]
    Group By Tag 

) MyTable
GROUP BY [Count Of Register]

Answer 2

你可以用

SELECT [Count Of Register], COUNT(*) FROM
    (SELECT COUNT([Id]) as [Count Of Register], Tag as [Tag]
     FROM [Members] GROUP BY Tag) q
GROUP BY [Count Of Register]

Answer 3

mysql> create table order1（counter int（3）not null auto_increment primary key， - > tag int（3））; 查詢OK，0行受影響（0.01秒）

mysql> insert into order1 values（500,20）; //按需要插入somany值並檢查插入到order1值（500,20）; 插入order1值（600,20）; mysql>選擇計數器，從計數器的order1組計數（*）