在MSSQL中选择和分组编号范围

如何在MSSQL中实现这一点我需要一个不同数字范围的组

您可以使用CTE执行此操作：

    SELECT
    CASE
        WHEN Vote BETWEEN 1 and 6 THEN '1-8'
        WHEN Vote BETWEEN 7 and 8 THEN '7-8'
        WHEN Vote BETWEEN 9 and 10 THEN '9-10'
    END AS Vote_range,
    COUNT(*) AS count
    FROM CaseRatingVote
    GROUP BY Vote_range
GO

---

在

选择

和

分组依据

中使用完全相同的表达式

with a as (
    SELECT
    CASE
        WHEN Vote BETWEEN 1 and 6 THEN '1-8'  --You may want to change this line!
        WHEN Vote BETWEEN 7 and 8 THEN '7-8'
        WHEN Vote BETWEEN 9 and 10 THEN '9-10'
    END AS Vote_range
    FROM CaseRatingVote
)
select  Vote_Range, count(*) as Row_Count
from    a
group by Vote_Range

或者，也可以先计算分组列（不分组），然后在外部范围中按该列分组。这种方法更适合于维护

SELECT
    CASE
        WHEN Vote BETWEEN 1 and 6 THEN '1-8'
        WHEN Vote BETWEEN 7 and 8 THEN '7-8'
        WHEN Vote BETWEEN 9 and 10 THEN '9-10'
    END AS Vote_range,
    COUNT(*) AS count
FROM 
    CaseRatingVote
GROUP BY 
    CASE
        WHEN Vote BETWEEN 1 and 6 THEN '1-8'
        WHEN Vote BETWEEN 7 and 8 THEN '7-8'
        WHEN Vote BETWEEN 9 and 10 THEN '9-10'
    END

---

将查询包装在派生表中，

groupby

其结果：

;WITH CTE AS
(
    SELECT
        CASE
            WHEN Vote BETWEEN 1 and 6 THEN '1-8'
            WHEN Vote BETWEEN 7 and 8 THEN '7-8'
            WHEN Vote BETWEEN 9 and 10 THEN '9-10'
        END AS Vote_range
    FROM 
        CaseRatingVote
)
SELECT
    Vote_range,
    COUNT(1)
FROM
    CTE AS C
GROUP BY
    C.Vote_range

选择SUM（投票数<7时为1，否则为0结束）作为[1-6]，
总和（如果投票数介于7和8之间，则1或0结束）为[7-8]，
总和（如果投票结果在9和10之间，则为1，否则为0结束）为[9-10]，
计数（*）作为计数
从个案投票

---

这对我来说是最简单的方法。

寻求调试帮助的问题（“为什么这段代码不起作用？”）必须包括所需的行为、特定的问题或错误以及在问题本身中重现它所需的最短代码。没有明确问题陈述的问题对其他读者没有用处。

select Vote_range, count(*) from
(
SELECT
CASE
    WHEN Vote BETWEEN 1 and 6 THEN '1-8'
    WHEN Vote BETWEEN 7 and 8 THEN '7-8'
    WHEN Vote BETWEEN 9 and 10 THEN '9-10'
END AS Vote_range
FROM CaseRatingVote
) dt
GROUP BY Vote_range

SELECT SUM(CASE WHEN Vote < 7 THEN 1 ELSE 0 END) AS [1-6],
        SUM(CASE WHEN Vote BETWEEN 7 AND 8 THEN 1 ELSE 0 END) AS [7-8],
        SUM(CASE WHEN Vote BETWEEN 9 AND 10 THEN 1 ELSE 0 END) AS [9-10],
        COUNT(*) AS count
 FROM CaseRatingVote