Oracle 窗口函數等高級運用

-- Create table
create table CUS_SECTION
(
  SECTION_ID    NUMBER,
  SECTION_NAME  VARCHAR2(10),
  WORK_TIME     NUMBER,
  UPDATE_USERID VARCHAR2(10),
  UPDATE_DATE   DATE default sysdate,
  SECTION_DESC  VARCHAR2(20),
  SECTION_DEMO  NUMBER,
  SEQ           NUMBER,
  SHIFT_ID      NUMBER,
  SECTION_SEQ   NUMBER
)

 

select to_char(sysdate,'yyyy-mm-dd hh:mi:ss')now_date,
to_char(sysdate+(30/24/60),'yyyy-mm-dd hh:mi:ss') new_date from dual;

select to_char(sysdate,'yyyy-mm-dd hh:mi:ss')now_date,
to_char(sysdate-(30/24/60),'yyyy-mm-dd hh:mi:ss') new_date from dual;

select add_months(sysdate,-4) from dual;

select months_between(sysdate,to_date('2008-01-01 02:00:00','yyyy-mm-dd hh:mi:ss')) result from dual;

select add_months(sysdate,2*12) two_years_later from dual;

select last_day(sysdate) last_day,last_day(sysdate)+1 fisrt_day from dual;

select next_day(sysdate,4) from dual;

select to_char(sysdate,'yyyy-mm-dd hh:mi:ss') now_date,
to_char(round(sysdate),'yyyy-mm-dd hh:mi:ss') round_date,
to_char(trunc(sysdate),'yyyy-mm-dd hh:mi:ss') trunc_date
from dual;

select to_char(sysdate,'yyyy-mm-dd hh:mi:ss') now_date,
to_char(round(sysdate,'hh24'),'yyyy-mm-dd hh:mi:ss') round_date,
to_char(trunc(sysdate,'hh24'),'yyyy-mm-dd hh:mi:ss') trunc_date
from dual;

select section_id,section_name,shift_id,
sum(work_time) section_times,
sum(sum(work_time)) over (partition by shift_id) shift_times 
from cus_section
group by section_id,section_name,shift_id

select section_id,section_name,shift_id,
sum(work_time) section_times,
sum(sum(work_time)) over (partition by shift_id) shift_times,
sum(sum(work_time)) over () all_times
from cus_section
group by section_id,section_name,shift_id

select section_id,section_name,
sum(work_time) section_times,
rank() over(order by sum(work_time) desc) rank,
dense_rank() over(order by sum(work_time) desc) dense_rank,
row_number() over(order by sum(work_time) desc) row_number
from cus_section
group by section_id,section_name

select section_id,section_name,
sum(work_time) section_times,
rank() over(partition by shift_id order by sum(work_time) desc nulls last) rank,
dense_rank() over(partition by shift_id order by sum(work_time) desc) dense_rank,
row_number() over(partition by shift_id order by sum(work_time) desc) row_number
from cus_section
group by section_id,section_name,shift_id

select min(section_id) keep(dense_rank first order by sum(work_time) desc) first,
 min(section_id) keep(dense_rank last order by sum(work_time) desc) last
from cus_section
group by section_id

select section_id,section_name,shift_id,
ntile(5) over (order by shift_id) shift_times
from cus_section
group by section_id,section_name,shift_id


select section_id,section_name,
sum(work_time) section_times,
sum(sum(work_time)) over (order by section_id rows between unbounded preceding and unbounded following) sum_shift_times
from cus_section
group by section_id,section_name,shift_id


select section_id,section_name,
sum(work_time) section_times,
sum(sum(work_time)) over (order by section_id rows between 1 preceding and unbounded following) sum_shift_times
from cus_section
group by section_id,section_name,shift_id

select section_id,section_name,
sum(work_time) section_times,
sum(sum(work_time)) over (order by section_id rows between unbounded preceding and current row) sum_shift_times,
avg(sum(work_time)) over (order by section_id rows between unbounded preceding and current row) avg_shift_times
from cus_section
group by section_id,section_name,shift_id


select trunc(update_date) day,
sum(work_time) section_times,
avg(sum(work_time)) over(order by trunc(update_date) range between interval '2' day preceding 
                                                     and interval '2' day following) five_shift_times
from cus_section
group by  update_date


select section_id,section_name,shift_id,
sum(work_time) section_times,
sum(sum(work_time)) over (partition by shift_id) shift_times ,
round(ratio_to_report(sum(work_time)) over (partition by shift_id),2) shift_present 
from cus_section
group by section_id,section_name,shift_id


select * from sys_bom
where bom_id=1000000135;

select * from sys_bom
where item_part_id=1000000135

select distinct level,bom_id,item_part_id from sys_bom 
start with bom_id=1000000135 connect by prior bom_id=item_part_id order by bom_id;
select distinct level,bom_id,item_part_id from sys_bom 
start with bom_id=1000000135 connect by  bom_id=prior item_part_id order by level

select count(distinct level) from sys_bom 
start with bom_id=1000000135 connect by  bom_id=prior item_part_id

select level,count(level) from sys_bom 
start with bom_id=1000000135 connect by  bom_id=prior item_part_id
group by level

select level,bom_id,item_part_id from sys_bom  where level=2
start with bom_id=1000000135 connect by  bom_id=prior item_part_id

select level,bom_id,item_part_id from sys_bom
start with bom_id=1000000135 connect by  bom_id=prior item_part_id