我有一张桌子
Create table t (
employee varchar2(10),
job varchar2(5),
start_date date,
end_date date,
FTE number
);
包含此数据:
insert into t values (1111,1,19-May-2008,18-May-2010,100);
insert into t values (1111,1,19-May-2010,30-Jun-2010,100);
insert into t values (1111,1,01-Jul-2010,13-Feb-2011,100);
insert into t values (1111,1,14-Feb-2011,13-Feb-2012,100);
insert into t values (1111,1,14-Feb-2012,13-Feb-2013,100);
insert into t values (1111,1,14-Feb-2013,27-Nov-2013,100);
insert into t values (1111,1,15-Nov-2013,27-Nov-2013,100);
insert into t values (1111,1,28-Nov-2013,24-Aug-2014,60);
insert into t values (1111,1,25-Aug-2014,24-Aug-2015,60);
insert into t values (1111,1,15-Nov-2014,24-Aug-2015,60);
insert into t values (1111,1,25-Aug-2015,14-Nov-2015,68.571);
insert into t values (1111,1,15-Nov-2015,31-Mar-2016,68.571);
insert into t values (1111,1,01-Apr-2016,11-Sep-2016,68.571);
insert into t values (1111,1,12-Sep-2016,29-Sep-2016,72.857);
insert into t values (1111,1,30-Sep-2016,10-Nov-2016,91.429);
insert into t values (1111,1,11-Nov-2016,14-Nov-2016,100);
insert into t values (1111,1,15-Nov-2016,23-Apr-2017,100);
insert into t values (1111,1,24-Apr-2017,14-Jan-2018,60);
insert into t values (1111,1,15-Jan-2018,31-May-2019,71.429);
insert into t values (1111,1,01-Jun-2019,31-Dec-2049,100);
我希望按照正确的开始日期和结束日期对FTE数据进行分组显示,以便它显示为
1111 1 19/05/2008 27/11/2013 100
1111 1 28/11/2013 24/08/2015 60
1111 1 25/08/2015 11/09/2016 68.571
1111 1 12/09/2016 29/09/2016 72.857
1111 1 30/09/2016 10/11/2016 91.429
1111 1 11/11/2016 23/04/2017 100
1111 1 24/04/2017 14/01/2018 60
1111 1 15/01/2018 31/05/2019 71.429
1111 1 1/06/2019 31/12/2049 100
我该怎么做?我试图做的是列出FTE发生变化的时间,以及发生变化时的相应开始日期和结束日期。
答案 0 :(得分:2)
这是Tabibitosan方法的直接应用,用于在序列中查找“连续”行的集合。在应用标准聚合之前,两个分析row_number()
函数的差异会创建所需的附加分组标记。
select employee, job, min(start_date) as start_date, max(end_date) as end_date, FTE
from ( select employee, job, start_date, end_date, FTE,
row_number() over (partition by employee, job order by start_date) -
row_number() over (partition by employee, job, FTE order by start_date)
as grp
from t
)
group by employee, job, FTE, grp
order by employee, start_date
;
EMPLOYEE JOB START_DATE END_DATE FTE
---------- ----- ----------- ----------- ----------
1111 1 19-May-2008 27-Nov-2013 100
1111 1 28-Nov-2013 24-Aug-2015 60
1111 1 25-Aug-2015 11-Sep-2016 68.571
1111 1 12-Sep-2016 29-Sep-2016 72.857
1111 1 30-Sep-2016 10-Nov-2016 91.429
1111 1 11-Nov-2016 23-Apr-2017 100
1111 1 24-Apr-2017 14-Jan-2018 60
1111 1 15-Jan-2018 31-May-2019 71.429
1111 1 01-Jun-2019 31-Dec-2049 100
9 rows selected.