Oracle 合併連續日期時間段

表結構: 表數據： 查詢結果： SQL代碼:

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with temp as ( select t.xmbh, 
   t.ygbh, 
   t.bjje,
   t.ssrq, 
   lead(ssrq, 1, ssrq) over(partition by xmbh order by ssrq) next_ssrq,
   lag(ssrq, 1, ssrq) over(partition by xmbh order by ssrq) prev_ssrq,
   lead(t.bjje) over(partition by xmbh order by ssrq) next_bjje,
   lag(t.bjje) over(partition by xmbh order by ssrq) prev_bjje
from ( select 1 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-1','yyyy-mm-dd') as ssrq,10 as bjje from dual
     union
     select 2 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-2','yyyy-mm-dd') as ssrq,50 as bjje from dual
     union
     select 3 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-3','yyyy-mm-dd') as ssrq,100 as bjje from dual
     union
     select 4 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-4','yyyy-mm-dd') as ssrq,100 as bjje from dual
     union
     select 5 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-5','yyyy-mm-dd') as ssrq,100 as bjje from dual
     union
     select 6 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-6','yyyy-mm-dd') as ssrq,80 as bjje from dual
     union
     select 7 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-7','yyyy-mm-dd') as ssrq,80 as bjje from dual
     union
     select 8 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-8','yyyy-mm-dd') as ssrq,80 as bjje from dual
     union
     select 9 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-9','yyyy-mm-dd') as ssrq,100 as bjje from dual
     union
     select 10 as resource_id,'TEMP1' as xmbh, '201311120001' as ygbh,to_date('2013-8-10','yyyy-mm-dd') as ssrq,50 as bjje from dual
     union
     select 11 as resource_id,'TEMP2' as xmbh, '201311120001' as ygbh,to_date('2013-11-6','yyyy-mm-dd') as ssrq,200 as bjje from dual
     union
     select 12 as resource_id,'TEMP2' as xmbh, '201311120001' as ygbh,to_date('2013-11-7','yyyy-mm-dd') as ssrq,100 as bjje from dual ) t order by xmbh, ygbh, ssrq )    
select * from (                  
select x.xmbh,
   x.ygbh,
   x.ssrq as ksrq,
   lead(x.prev_ssrq ,1 ,x.ssrq) over(partition by x.xmbh order by x.ssrq) jsrq,
   x.bjje
from ( select g.xmbh, 
        g.ygbh, 
        g.bjje, 
        g.ssrq, 
        (case when g.diff <> 0 then g.ssrq else g.next_ssrq end) as next_ssrq, 
        g.prev_ssrq, 
        g.diff, 
        g.prev_diff 
    from (select t.*, 
         (case when t.next_bjje is null then 1 when t.next_ssrq - t.ssrq > 1 then 1 else t.bjje - t.next_bjje end) as diff, 
         (case when t.prev_bjje is null then 1  when t.ssrq - t.prev_ssrq > 1 then 1 else t.bjje - t.prev_bjje end) as prev_diff 
         from temp t order by t.xmbh, t.ygbh, t.ssrq )g
   union (select  xmbh,
                         ygbh,
                         -999 as bjje,
                         max(ssrq) + 1 as ssrq,
                         max(ssrq) + 1 as next_ssrq,
                         max(ssrq) as prev_ssrq,
                         1 as diff,
                         1 as pre_diff
                    from temp group by xmbh, ygbh)
     ) x  where x.prev_diff <> 0  )  where bjje <> -999