sql - 向表中添加数字 id

Question

SELECT top 5
day_description,
count(numberofdays) as number

FROM mytable

where department = 'departmentname'

group by day_description

我的选择带回了这样的东西:

day description           number           
holiday                     32               
working day                 212              
training day                5                
meeting day                 26               
admin day                   66   

有没有办法添加一个新列，它指定 1-5，1 是最高值行，5 是最低值行。看起来像这样:

day description           number           top5ID
holiday                     32               3
working day                 212              1
training day                5                5
meeting day                 26               4
admin day                   66               2

Answer 1

也许是这样的:

;WITH CTE
AS
(
    SELECT top 5
        day_description,
        count(numberofdays) as number
    FROM mytable
    where department = 'departmentname'
    group by day_description
)
SELECT
    ROW_NUMBER() OVER(ORDER BY CTE.number DESC) AS Top5ID,
    CTE.*
FROM
    CTE

或者没有 CTE:

SELECT
    ROW_NUMBER() OVER(ORDER BY t.number DESC) AS Top5ID,
    t.*
FROM
    (
        SELECT top 5
        day_description,
        count(numberofdays) as number
        FROM mytable
        where department = 'departmentname'
        group by day_description
    ) AS t