我需要一列显示值的行＃

Question

“显示与每个本科相关专业的号码，只包括具有专业2和10之间的节目”

SELECT prg_field AS "College", prg_name AS "Number of Majors" 
FROM program 
WHERE prg_type = 'U' 

我的“专业学生数“专栏作为主要名称出现，我如何将其更改为与大学的prg_field专栏相关的值？

Answer 1

如果我理解正确，您想要查找每个学院的不同prg_name的编号。如果这是正确的，你可以得到不同的集学院/专业，然后计算每个学院的专业如下：

;WITH distSets as (
SELECT DISTINCT prg_field as 'College', prg_name as 'Number of Majors' 
) 

Select 
    College 
    ,COUNT(*) over (partition by College) as 'Count of Majors' 
From distSets 

有可能是另一种方式，如果你不能使用一个CTE来格式化这个。 希望这有助于。

Answer 2

SELECT prg_field AS "College", 
     COUNT(prg_name) AS "Number of Majors" 
FROM program 
WHERE prg_type = 'U' 
GROUP BY prg_field 
HAVING COUNT(prg_name) BETWEEN 2 AND 10; 

如果有重复prg_name当时的使用COUNT(DISTINCT prg_name)代替COUNT(prg_name)顶部和底部。

Answer 3

考虑派生表子查询：

SELECT t1.prg_field AS "College", Count(*) As "Number Of Distinct Majors" 
FROM 
    (SELECT DISTINCT prg_field, prg_name 
    FROM program 
    WHERE prg_type = 'U') t1 
GROUP BY t1.prg_field 
HAVING Count(*) BETWEEN 2 AND 10