Question

我正在尝试根据列的GROUP BY获取一系列行数。我现在得到的是：

select grouping_column,
(select count(value) from table where value IS NOT NULL and value BETWEEN 0 AND 300) AS Count_A,
(select count(value) from table where value IS NOT NULL and value BETWEEN 301 AND 600) AS Count_B,
...many more like this...
from table
group by grouping_column;

我想象的就是：

Grouping_column | Count_A | Count_B

将Count_A和Count_B按每个grouping_column级别拆分。但是，这不会发生。相反，我得到的是列出的grouping_column的级别，以及Count_A和Count_B指定范围内的所有值的计数。

我尝试了很多不同的版本，但似乎每次都不合适。我做错了什么？

Answer 1

试试这个：

SELECT
    grouping_column,
    SUM(value BETWEEN 0 AND 300) AS Count_A,
    SUM(value BETWEEN 301 AND 600) AS Count_B,
    ...many more like this...
FROM yourtable
GROUP BY grouping_column

MySQL中的行/列问题分组

1 个答案: