Question

我希望在注册日期之后立即访问信息（visit_dt，visit_loc等）。

例如：

CREATE TABLE tst_tbl
(
   id                 NUMBER,
   last_name          VARCHAR2 (50),
   first_name         VARCHAR2 (50),
   dob                DATE,
   register_dt        DATE,
   register_loc       VARCHAR2 (50),
   visit_dt           DATE,
   visit_loc          VARCHAR2 (50),
   visit_comments   VARCHAR2 (30)
);


INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('02/26/2018','MM/DD/YYYY'), 'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('2/12/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('11/6/2017', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('10/23/2017','MM/DD/YYYY'), 'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('3/27/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('3/19/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('09/05/2017' ,'MM/DD/YYYY')   ,'NEW YORK',  to_date('9/11/2017', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('11/6/2017 ','MM/DD/YYYY'), 'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('3/19/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('9/11/2017', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('3/27/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('2/26/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('10/23/2017','MM/DD/YYYY'), 'NEW JERSEY', '');
INSERT INTO tst_tbl VALUES(1234, 'John', 'Smith', to_date('12/01/1980','MM/DD/YYYY') , to_date('2/7/2018'   ,'MM/DD/YYYY')   ,  'NEW YORK',to_date('2/12/2018', 'MM/DD/YYYY'),'NEW JERSEY', '');
COMMIT;

我尝试使用以下逻辑对注册日期和访问日期进行排序，然后使用Lead检索以下日期并仅过滤注册日期。但是，我无法添加上述其他字段。

1234, John, Smith, 12/01/1980, 09/05/2017,  NEW YORK, 9/11/2017, NEW JERSEY
1234, John, Smith, 12/01/1980, 2/7/2018,  NEW YORK, 2/12/2018, NEW JERSEY

Answer 1

我觉得您太复杂了。如果访问日期在登记日期之后少于30天，您可以通过这种方式添加指标。如果出于某些原因对您不起作用，请编辑您的问题并添加更多数据（例如，输出应为什么样？）

select r.*, 
    case when (floor(visit_dt - register_dt) between 0 and 29) 
         then 'Y' else 'N' 
         end as less_than_30_days
from tst_tbl r;

但这是基于您的示例输出。根据您的查询，您似乎要查找过去30天内（该ID）具有 any 注册日期的所有访问。如果您更愿意这样做，这是一种更简单的方法。

select v.*,
    (select nvl(max('Y'),'N')
      from tst_tbl r
      where r.id = v.id
        and (floor(v.visit_dt - r.register_dt) between 0 and 29))
      as reg_within_30_days
from tst_tbl v;

Answer 2

如果我理解正确，并且假定ID是唯一标识符，则希望按（ID，REGISTER_DT）并按每个组对行进行分组，以仅使用VISIT_DT> = REGISTER_DT，然后按每个组对行进行分组通过VISIT_DT选择最早（最旧）的行。如果是这样，类似这样的事情应该起作用：

select (columns you want)
from   (
         select t.* 
              , row_number() over (partition by id, register_dt
                                   order by visit_dt) as rn
         from   tst_tbl t
         where  visit_dt >= register_dt
       )
where  rn = 1
;

Answer 3

尝试一下

Select id, last_name, first_name, dob, register_dt, register_loc,
visit_dt
From (
  Select r.id, r.last_name, r.first_name, r.dob, r.register_dt, r.register_loc,
r.visit_dt, r.visit_loc, row_number() over (partition by r.register_dt order by r.visit_dt) r
From tst_tbl r
where register_dt < visit_dt
) x
Where x.r = 1

oracle sql从先前日期中检索后续日期

3 个答案: