월별 합개 질문입니다.

깨비꼬비 2015.03.02 16:46 Views : 3746

데이터터는...

no	name	start_date	end_date
1	홍길동	2013-05
2	유관순	2011-03	2014-08
3	한석봉	2014-12
4	김유신	2015-02

대략 이런식으로.. 되있습니다.

입학일과 졸업일 이라고 보면 되고요.

이런 데이터에서

2014-01 ~ 2014-10 까지의 현원 수 를 구하라.... 는것이 문제인데...

mdate	now_cnt
2014-01	4
2014-02	4
2014-03	4
2014-04	4
2014-05	4
2014-06	4
2014-07	4
2014-08	4
2014-09	3
2014-10	3

이런식으로 end_date 가 존재하는 날짜 이후는 현원에서 빠지게끔의 count 를... 매기게끔...

어떻게 해야되는지;;

답변 부탁드립니다.

I want to

cmd_document_vote_user Update Log List

Comment 3

Terry

2015.03.02 19:49

일단 결과만 나오게..

쿼리 자체는 단순무식합니다 -_-;;;

----------쿼리시작

Declare @as_from_yymm Char(7)
Declare @as_to_yymm   Char(7)

Select @as_from_yymm = '2014-01'
Select @as_to_yymm   = '2014-10'
with table_a As
(
    Select '홍길동' as name, '2013-05'   As start_date, ''   As end_date Union All
    Select '유관순' as name, '2011-03'   As start_date, '2014-08'   As end_date Union All
    Select '한석봉' as name, '2014-12'   As start_date, ''   As end_date Union All
    Select '김유신' as name, '2015-02'   As start_date, ''   As end_date
)
,month_t As
(
    Select '2011-01' As mon Union All
    Select '2011-02' As mon Union All
    Select '2011-03' As mon Union All
    Select '2011-04' As mon Union All
    Select '2011-05' As mon Union All
    Select '2011-06' As mon Union All
    Select '2011-07' As mon Union All
    Select '2011-08' As mon Union All
    Select '2011-09' As mon Union All
    Select '2011-10' As mon Union All
    Select '2011-11' As mon Union All
    Select '2011-12' As mon Union All
    Select '2012-01' As mon Union All
    Select '2012-02' As mon Union All
    Select '2012-03' As mon Union All
    Select '2012-04' As mon Union All
    Select '2012-05' As mon Union All
    Select '2012-06' As mon Union All
    Select '2012-07' As mon Union All
    Select '2012-08' As mon Union All
    Select '2012-09' As mon Union All
    Select '2012-10' As mon Union All
    Select '2012-11' As mon Union All
    Select '2012-12' As mon Union All
    Select '2013-01' As mon Union All
    Select '2013-02' As mon Union All
    Select '2013-03' As mon Union All
    Select '2013-04' As mon Union All
    Select '2013-05' As mon Union All
    Select '2013-06' As mon Union All
    Select '2013-07' As mon Union All
    Select '2013-08' As mon Union All
    Select '2013-09' As mon Union All
    Select '2013-10' As mon Union All
    Select '2013-11' As mon Union All
    Select '2013-12' As mon Union All
    Select '2014-01' As mon Union All
    Select '2014-02' As mon Union All
    Select '2014-03' As mon Union All
    Select '2014-04' As mon Union All
    Select '2014-05' As mon Union All
    Select '2014-06' As mon Union All
    Select '2014-07' As mon Union All
    Select '2014-08' As mon Union All
    Select '2014-09' As mon Union All
    Select '2014-10' As mon Union All
    Select '2014-11' As mon Union All
    Select '2014-12' As mon Union All
    Select '2015-01' As mon Union All
    Select '2015-02' As mon Union All
    Select '2015-03' As mon Union All
    Select '2015-04' As mon Union All
    Select '2015-05' As mon Union All
    Select '2015-06' As mon Union All
    Select '2015-07' As mon Union All
    Select '2015-08' As mon Union All
    Select '2015-09' As mon Union All
    Select '2015-10' As mon Union All
    Select '2015-11' As mon Union All
    Select '2015-12' As mon
)
                  Select
                         a.mon
                        ,(
                            Case When ISNULL(a.end_date,'') = ''
                                    Then a.cnt
                                 Else a.cnt - 1
                            End
                         )        As cnt
                    From
                        (
                              Select
                                     a.mon   As mon
                                    ,MAX(a.cnt) As cnt
                                    ,Max(b.end_date) As end_date
                                From
                                    (
                                        Select
                                               b.mon         As mon
                                              ,(
                                                  Select COUNT(1)
                                                    From table_a b
                                                   Where b.start_date <= a.start_date
                                               )   As cnt
                                          From table_a a
                                                         Left Outer Join
                                                                         month_t b
                                                                                   On a.start_date <= b.mon
                                         Where b.mon Between @as_from_yymm And @as_to_yymm
                                    ) a
                                        Left Outer Join
                                                        table_a b
                                                                  On a.mon > b.end_date
                            Group By a.mon
                        ) a
----------쿼리 끝

결과값

|----------|--------|
|mon       |   cnt |
|----------|--------|
|2014-01   |   2    |
|2014-02   |   2    |
|2014-03   |   2    |
|2014-04   |   2    |
|2014-05   |   2    |
|2014-06   |   2    |
|2014-07   |   2    |
|2014-08   |   2    |
|2014-09   |   1    |
|2014-10   |   1    |
|----------|--------|

cmd_comment_vote_user Upvote0 Downvote0
웬리

2015.03.03 16:05

DECLARE @tbl TABLE (
no int IDENTITY(1,1),
name varchar(20),
start_date date,
end_date date NULL)

INSERT INTO @tbl values ('홍길동','2013-05-01',NULL)
INSERT INTO @tbl values ('유관순','2011-03-01','2014-08-01')
INSERT INTO @tbl values ('한석봉','2014-12-01',NULL)
INSERT INTO @tbl values ('김유신','2015-02-01',NULL)

DECLARE @datetbl TABLE(
mdate date)

DECLARE @date DATE

SET @date = '2013-01-01'

WHILE @date < '2015-03-01'
BEGIN

INSERT @datetbl
SELECT @date

SET @date = DATEADD(MONTH,1,@date)
END

SELECT mdate, COUNT(*) as cnt
FROM @tbl a
INNER JOIN @datetbl b ON b.mdate BETWEEN a.start_date AND ISNULL (end_date,'2999-12-31')
GROUP BY mdate

cmd_comment_vote_user Upvote0 Downvote0
한태

2016.04.14 16:20

CREATE TABLE mancnt(
no int IDENTITY(1,1),
name varchar(20),
start_date date,
end_date date NULL)
INSERT INTO mancnt values ('홍길동','2013-05-01',NULL)
INSERT INTO mancnt values ('유관순','2011-03-01','2014-08-01')
INSERT INTO mancnt values ('한석봉','2014-12-01','2015-08-01')
INSERT INTO mancnt values ('김유신','2015-02-01',NULL)

declare @sdate datetime = '2014-01-01'
declare @edate datetime = '2015-10-01'

;with cte as
(select @sdate sd
,start_date
,end_date
,case when start_date<=@sdate then 1 else 0 end s
,case when end_date<@sdate then -1 else 0 end e
from mancnt
union all
select dateadd(mm,1,sd) sd
,start_date
,end_date
,case when start_date<=dateadd(mm,1,sd) then 1 else 0 end s
,case when end_date<dateadd(mm,1,sd) then -1 else 0 end e
from cte
where sd<@edate
)
SELECT sd mdate, SUM(s+e) now_cnt
FROM cte
GROUP BY sd
OPTION (MAXRECURSION 0)

cmd_comment_vote_user Upvote0 Downvote0

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월별 합개 질문입니다.

Comment 3

Terry

웬리

한태

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