sql语句开发

create table test2(storeid number,createdate date);


insert into test2(storeid,createdate) values(22,date'2015-04-21');
insert into test2(storeid,createdate) values(24,date'2015-04-22');
insert into test2(storeid,createdate) values(26,date'2015-04-23');
insert into test2(storeid,createdate) values(27,date'2015-04-24');
insert into test2(storeid,createdate) values(20,date'2015-04-25');
insert into test2(storeid,createdate) values(22,date'2015-04-26');
insert into test2(storeid,createdate) values(30,date'2015-05-01');
insert into test2(storeid,createdate) values(40,date'2015-05-02');
insert into test2(storeid,createdate) values(52,date'2015-05-03');
insert into test2(storeid,createdate) values(20,date'2015-05-04');
insert into test2(storeid,createdate) values(20,date'2015-05-06');


SQL> alter session set nls_date_format='yyyy-mm-dd';

Session altered.

SQL> select * from test2;

   STOREID CREATEDATE
---------- ----------
        22 2015-04-21
        24 2015-04-22
        26 2015-04-23
        27 2015-04-24
        20 2015-04-25
        22 2015-04-26
        30 2015-05-01
        40 2015-05-02
        52 2015-05-03
        20 2015-05-04
        20 2015-05-06

11 rows selected.

要求获得如下结果：

       CNT (ROWNUM-1)*3 MAXSTOREID MINSTOREID MAXCREATE  MINCREATE
---------- ------------ ---------- ---------- ---------- ----------
         3            0         26         22 2015-04-23 2015-04-21
         3            3         27         24 2015-04-24 2015-04-22
         3            6         27         20 2015-04-25 2015-04-23
         3            9         27         20 2015-04-26 2015-04-24
         3           15         52         30 2015-05-03 2015-05-01
         3           18         52         20 2015-05-04 2015-05-02

6 rows selected.



语句如下，比较乱啊，待整理

with 
store_grb as 
(
select a.rn, a.storeid, a.createdate,lag_create, nvl(lag_create,createdate) as lag_create2,
case when a.createdate=nvl(lag_create,createdate) then 1 else 0 end as grb0, 
sum(case when a.createdate=a.lag_create then 0 else 1 end)over(order by a.rn) as grb1
from 
(
select rownum rn,storeid,createdate,lag(createdate) over(order by rownum) + 1 as lag_create from test2 )a ),
abc as 
(select rn,storeid,createdate,lag_create,
grb0,grb1,count(grb1)over(partition by grb1) as cntgrb1
from  store_grb ),
bcd2 as 
(
select rn,3 as cnt,storeid,
max(storeid)over(order by rn rows between 1 preceding and 1 following) maxstoreid,
min(storeid)over(order by rn rows between 1 preceding and 1 following) minstoreid,
createdate,lag_create,
min(createdate)over(order by rn  rows between 1 preceding and 1 following ) as mincreate,
max(createdate)over(order by rn  rows between 1 preceding and 1 following ) as maxcreate,
grb0,grb1
--,case when maxcreate-mincreate>=2 then 1 else 0 end
 from (select * from abc where cntgrb1>3 )),
dddd as  
(select t.*
from bcd2 t where  t.maxcreate -t.mincreate >=2
and t.maxcreate > t.createdate
and t.grb0<>0),
bbb as (select cnt,(rownum-1)*3,maxstoreid,minstoreid,maxcreate,mincreate from dddd)
select * from bbb where maxcreate<=mincreate+2;


       CNT (ROWNUM-1)*3 MAXSTOREID MINSTOREID MAXCREATE  MINCREATE
---------- ------------ ---------- ---------- ---------- ----------
         3            0         26         22 2015-04-23 2015-04-21
         3            3         27         24 2015-04-24 2015-04-22
         3            6         27         20 2015-04-25 2015-04-23
         3            9         27         20 2015-04-26 2015-04-24
         3           15         52         30 2015-05-03 2015-05-01
         3           18         52         20 2015-05-04 2015-05-02

6 rows selected.