Sql 回答我的意思欢迎。坚持下去我不明白project_status_id和table project_status来自哪里？复制/粘贴错误？是的，是复制粘贴错误。您可以参考我的下一条评论。选择countVIN，从股票类别中选择countVIN=按类别从股票组中

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回答我的意思欢迎。坚持下去我不明白project_status_id和table project_status来自哪里？复制/粘贴错误？是的，是复制粘贴错误。您可以参考我的下一条评论。选择countVIN，从股票类别中选择countVIN=按类别从股票组中选择maxcountVIN，或countVIN=按类别从股票组中选择mincountVIN；此查询完美：D此查询完美：D此查询完美：D此查询完美：D此查询完美：D

SELECT category, COUNT(distinct VIN) COUNT
FROM stock
group by category
order by category ASC

CATEGORY COUNT
Sedan    25
SUV      15
TRUCK    15
AWD      10

CATEGORY COUNT
Sedan    25
AWD      10

select 
   count(VIN), 
   Category 
from STOCK
having count(VIN)=
    (
        select max(count(VIN))  
        from STOCK group by project_status_id 
    )
    OR count(project_status_id)=
    (
        select min(count(project_status_id))  
        from project_status group by project_status_id 
     )
group by project_status_id

Select category, CNT
FROM
(SELECT category, COUNT(distinct VIN) CNT
FROM stock
group by category
Order by CNT asc) a
where RowNum = 1
UNION
Select category, CNT
FROM
(SELECT category, COUNT(distinct VIN) CNT
FROM stock
group by category
Order by CNT desc) a
where RowNum = 1

select count(VIN), Category 
from STOCK
having count(VIN)=(select max(count(VIN)) from STOCK group by Category )
OR count(VIN)=(select min(count(VIN))  from STOCK group by Category )
group by Category; 

CREATE TABLE counts ( CATEGORY, "COUNT" ) AS
          SELECT 'Sedan',    25 FROM DUAL
UNION ALL SELECT 'SUV',      15 FROM DUAL
UNION ALL SELECT 'TRUCK',    15 FROM DUAL
UNION ALL SELECT 'AWD',      10 FROM DUAL;

SELECT MAX( CATEGORY ) KEEP ( DENSE_RANK LAST ORDER BY "COUNT" ASC ) AS CATEGORY,
       MAX( "COUNT" ) AS "COUNT"
FROM   COUNTS
UNION ALL
SELECT MIN( CATEGORY ) KEEP ( DENSE_RANK FIRST ORDER BY "COUNT" ASC ) AS CATEGORY,
       MIN( "COUNT" ) AS "COUNT"
FROM   COUNTS

| CATEGORY | COUNT |
|----------|-------|
|    Sedan |    25 |
|      AWD |    10 |