Question

Declare @dCurrentDate Date = CONVERT (DATE, GETDATE())

Declare @dNextDate Date = DATEADD(month,1,CONVERT (DATE, GETDATE()))

我创建了一个包含10个员工ID并且名称为@tbl

的表

然后我写了一个查询，以选择未来30天员工的最短和最长日期。

  SELECT 
         c.fkEmployeeId as Employee, 
         e.FullName,c.calendarday 
    FROM  
         EmployeeCalendar c 
                            JOIN Employee e 
                                  ON (e.pkEmployeeId=c.fkEmployeeId) 
GROUP BY c.fkEmployeeId,
         e.FullName,
         c.calendarday
  HAVING 
         c.CalendarDay BETWEEN @dCurrentDate AND @dNextDate 
     AND c.fkEmployeeId IN (
                            SELECT
                                   EmployeeId 
                              FROM
                                   @tbl
                           )

我得到了结果

Id  |   Name                   |  Date 
76      Muhammad                  2014-03-05
76      Muhammad                  2014-03-12
594     Khan                      2014-02-14

但我需要

    Id    |   Name           | min_date      | max_date
    76        muhammad         2014-03-05      2014-03-12
   594        khan             2014-02-14      2014-02-14

我怎么能得到这个。

Answer 1

SELECT id, MIN(record_date), MAX(record_date) FROM table GROUP BY id

Answer 2

  SELECT id, 
         MIN(record_date) AS min_record_date, 
         MAN(record_date) AS max_record_date 
    FROM table 
GROUP BY id;

Answer 3

尝试这个......

    DECLARE @dCurrentDate DATE = CONVERT (DATE, GETDATE ()) 
DECLARE @dNextDate 
DATE = DATEADD (MONTH, 1, CONVERT (DATE, GETDATE ())) 
SELECT 
  c.fkEmployeeId AS Employee,
  e.FullName, MIN(c.calendarday),MAX(c.calendarday) 
FROM
  EmployeeCalendar c 
  JOIN Employee e 
    ON (e.pkEmployeeId = c.fkEmployeeId) 
GROUP BY c.fkEmployeeId
HAVING c.CalendarDay BETWEEN @dCurrentDate 
  AND @dNextDate 
  AND c.fkEmployeeId IN 
  (SELECT 
    EmployeeId 
  FROM
    @tbl)

Answer 4

试试这个。

SELECT id,Name 
MIN(record_date) AS min_date, 
MAN(record_date) AS max_date 
FROM table 
GROUP BY id,Name
ORDER BY id

分组并获得分钟和日期

4 个答案: