MySQL查询排除最高和最低计数

Question

我在MySql中有以下表格

Number
1
2
3
2
3
4
4
4

我想按计数获得数字，但排除最高和最低计数。这应该是结果

Number  Count
2       2
3       2

请帮我解决这个问题。

Answer 1

试试这个：

SELECT number, COUNT(*) cnt
FROM mytable
GROUP BY number
HAVING cnt <> (SELECT COUNT(*)
               FROM mytable
               GROUP BY number
               ORDER BY COUNT(*) LIMIT 1)
       AND               

       cnt <> (SELECT COUNT(*)
               FROM mytable
               GROUP BY number
               ORDER BY COUNT(*) DESC LIMIT 1)

HAVING子句中使用的两个子查询返回最小和最大计数。因此，HAVING子句的两个谓词过滤掉具有最高和最低计数的组。

Answer 2

解决方案正在使用user variable和sub-query。

需要查询：

select Number, Count
from (
    select Number, count(*) as Count, @rank := @rank+1 as rank
    from t1 cross join (select @rank := 0) param
    group by Number
    order by Count ) t2 
where rank not in (1, @rank);

演示：

create table t1(Number int);
insert into t1 values(1),(2),(3),(2),(3),(4),(4),(4);

select Number, Count
from (
    select Number, count(*) as Count, @rank := @rank+1 as rank
    from t1 cross join (select @rank := 0) param
    group by Number
    order by Count ) t2 
where rank not in (1, @rank);

输出：

mysql> select Number, Count
    -> from (
    -> select Number, count(*) as Count, @rank := @rank+1 as rank
    -> from t1 cross join (select @rank := 0) param
    -> group by Number
    -> order by Count ) t2
    -> where rank not in (1, @rank);
+--------+-------+
| Number | Count |
+--------+-------+
|      2 |     2 |
|      3 |     2 |
+--------+-------+
2 rows in set (0.00 sec)

Answer 3

select number,count(number)
from numbers 
where number not in ((select max(number) from numbers),(select min(number) from numbers)  )
group by number

sqlfiddle demo

Answer 4

首先选择除最大和最小数字之外的所有行 然后从结果集中找到计数（数字）。

<强>查询

select t.number, count(t.number) as `Count` from(
    select * from your_table_name
    where number not in (
        select max(number) from your_table_name
    )
    and number not in (
        select min(number) from your_table_name
    )
)t
group by t.num;

Answer 5

SELECT列FROM tbl 限制10 OFFSET 20

SELECT MIN（taka）AS mintaka，MAX（taka）AS maxtaka FROM（SELECT taka FROM tbl LIMIT 10 OFFSET 20）;