Question

我有一张如下表所示的表格，我需要按照ID和类型对每个约会和分组进行计数，然后按最早的约会排序并给它一个数字并计算。

我正在使用MS SQL服务器管理工作室。

Select ID, Date, Type
From Appointment
Where Type='Post-op'

在

ID  | Date          | Type
123 | 2013-01-01    | Post-op
123 | 2013-01-21    | Post-op
123 | 2013-02-28    | Post-op
123 | 2013-05-16    | Post-op
124 | 2013-01-21    | Post-op
124 | 2013-02-12    | Post-op

在

ID  | Date          | Type      | Count
123 | 2013-01-01    | Post-op   | 1
123 | 2013-01-21    | Post-op   | 2
123 | 2013-02-28    | Post-op   | 3
123 | 2013-05-16    | Post-op   | 4
124 | 2013-01-21    | Post-op   | 1
124 | 2013-02-12    | Post-op   | 2

由于

Answer 1

在SELECT

中使用窗口函数

SELECT id
      ,[date]
      ,type
      ,ROW_NUMBER() OVER (PARTITION BY ID ORDER BY [date] ) AS seq
FROM  Appointment
WHERE Type = 'Post-op'

SqlFiddle：http://sqlfiddle.com/#!3/f3a4f/1

Answer 2

似乎你在ROW_NUMBER

之后

;with TempData as (Select ID  ,Date,Type DataCount =ROW_NUMBER()
                    over(PARTITION By Id Order By Date)
                    From Appointment
                    Where Type='Post-op')

Select * from TempData

SQL：从最旧到最新的约会开始计算每条记录

2 个答案: