私のSQLには分析関数もCTEもピボットテーブル機能もありません。このため、必要なクエリを直接実行することはできません(そして誰もあなたの質問に答えません)。
このデータの場合:
create table t ( uid int, rt date);
insert into t values
(99, '2013-08-7 14:02:53' ), <- gap
(99, '2013-08-9 14:02:53' ), <-
(99, '2013-08-10 14:03:25' ),
(1000, '2013-08-7 14:02:53' ),
(1000, '2013-08-8 14:03:25' ),
(1000, '2013-08-9 14:03:25' ),
(1000, '2013-08-10 14:04:47');
これは、特定の日付のピボット保持前のアプローチです( '2013-08-10 00:00:00' , '%Y-%m-%d')
。
select count( distinct uid ) as n, d, dt from
(
select uid,
'2013-08-10 00:00:00' as d,
G.dt
from
t
inner join
( select 7 as dt union all
select 6 union all select 5 union all
select 4 union all select 3 union all
select 2 union all select 1 union all select 0) G
on DATE_FORMAT( t.rt, '%Y-%m-%d') between
DATE_FORMAT( date_add( '2013-08-10 00:00:00', Interval -1 * G.dt DAY) ,
'%Y-%m-%d')
and
DATE_FORMAT( '2013-08-10 00:00:00' , '%Y-%m-%d')
where DATE_FORMAT(rt , '%Y-%m-%d') <= DATE_FORMAT( '2013-08-10 00:00:00' ,
'%Y-%m-%d')
group by uid, G.dt
having count( distinct DATE_FORMAT( T.rt, '%Y-%m-%d') ) = G.dt + 1
) TT
group by dt
事前に調理されたデータ (DT = 0 は今日の訪問を意味し、DT = 1 は連続した 2 日間を意味します...):
| N | D | DT |
--------------------------------
| 2 | 2013-08-10 00:00:00 | 0 |
| 2 | 2013-08-10 00:00:00 | 1 |
| 1 | 2013-08-10 00:00:00 | 2 |
| 1 | 2013-08-10 00:00:00 | 3 |
ここにあります(同じデータの場合):
select count( distinct uid ) as n, d, dt from
(
select uid,
z.zt as d,
G.dt
from
t
cross join
( select distinct DATE_FORMAT( t.rt, '%Y-%m-%d') as zt from t) z
inner join
( select 7 as dt union all
select 6 union all select 5 union all
select 4 union all select 3 union all
select 2 union all select 1 union all select 0) G
on DATE_FORMAT( t.rt, '%Y-%m-%d') between
DATE_FORMAT( date_add( z.zt, Interval -1 * G.dt DAY) ,
'%Y-%m-%d')
and
z.zt
where z.zt <= z.zt
group by uid, G.dt, z.zt
having count( distinct DATE_FORMAT( T.rt, '%Y-%m-%d') ) = G.dt + 1
) TT
group by d,dt
order by d,dt
sqlfiddle での結果: http://sqlfiddle.com/#!2/c26ec/10/0
| N | D | DT | GROUP_CONCAT( UID) |
--------------------------------------------
| 2 | 2013-08-07 | 0 | 1000,99 |
| 1 | 2013-08-08 | 0 | 1000 |
| 1 | 2013-08-08 | 1 | 1000 |
| 2 | 2013-08-09 | 0 | 1000,99 |
| 1 | 2013-08-09 | 1 | 1000 |
| 1 | 2013-08-09 | 2 | 1000 |
| 2 | 2013-08-10 | 0 | 1000,99 |
| 2 | 2013-08-10 | 1 | 99,1000 |
| 1 | 2013-08-10 | 2 | 1000 |
| 1 | 2013-08-10 | 3 | 1000 |