Sql 如何找到使用最多和最少的钥匙？

我的表格中有以下数据：

INSERT INTO VIDEOS VALUES(20,'V1','KIDNAP','CRIME');
INSERT INTO VIDEOS VALUES(20,'V2','ABUSE','CRIME');
INSERT INTO VIDEOS VALUES(20,'V3','ROBBERY','CRIME');
INSERT INTO VIDEOS VALUES(20,'V4','MURDER','CRIME');
INSERT INTO VIDEOS VALUES(20,'V5','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(20,'V6','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(20,'V7','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(20,'V8','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(20,'V9','SOCIAL','SOCIAL');
INSERT INTO VIDEOS VALUES(19,'V1','KIDNAP','CRIME');
INSERT INTO VIDEOS VALUES(19,'V2','ABUSE','CRIME');
INSERT INTO VIDEOS VALUES(19,'V3','ROBBERY','CRIME');
INSERT INTO VIDEOS VALUES(19,'V4','MURDER','CRIME');
INSERT INTO VIDEOS VALUES(19,'V5','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(19,'V6','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(19,'V7','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(19,'V8','POLITICAL','POLITICAL');
INSERT INTO VIDEOS VALUES(29,'V1','KIDNAP','CRIME');
INSERT INTO VIDEOS VALUES(29,'V2','ABUSE','CRIME');
INSERT INTO VIDEOS VALUES(29,'V3','ROBBERY','CRIME');

从上面的19、20和29是关键值。我想找到与键一起具有最小值和最大值的键

此处，键29的值最少（3），键20的值最多（9）

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如何识别使用最少和最多的键值？

如果您没有领带，您可以使用

保持稠密\u排名

，或者在这种情况下使用两个版本，使用和：

如果您确实有领带，您可以通过在

orderby

-比如

orderby count（*），id

中添加另一个子句来决定如何订购领带

但是，如果出现平局，这种方法将不允许返回两个结果。如果需要这样做，可以使用inine视图。添加一些数据，使最低计数保持一致：

INSERT INTO VIDEOS VALUES(30,'V1','KIDNAP','CRIME');
INSERT INTO VIDEOS VALUES(30,'V2','ABUSE','CRIME');
INSERT INTO VIDEOS VALUES(30,'V3','ROBBERY','CRIME');

最低要求：

select id
from (
  select id, dense_rank() over (order by count(*)) as rnk
  from videos
  group by id
)
where rnk = 1;

        ID
----------
        30
        29

最大值：

select id
from (
  select id, dense_rank() over (order by count(*) desc) as rnk
  from videos
  group by id
)
where rnk = 1;

        ID
----------
        20

---

如果有平局呢？@Cory，显示两个值

select id
from (
  select id, dense_rank() over (order by count(*) desc) as rnk
  from videos
  group by id
)
where rnk = 1;

        ID
----------
        20