补齐不连续的月份问题，谢谢！

[520NET]

表有两个字段
字段1(VARCHAR2):存储月份 字段2（NUMBER）:存储值

字段1 字段2
201010 4
201102 7

我想补齐不连续的月，谢谢，结果如下：
字段1 字段2
201010 4
201011 0
201012 0
201101 0
201102 7

[luoyoumou]

不明白你的意思!

-- 要生成连续月份很简单：用递归查询 connect by

[opps_zhou]

with t as
(
    select '201010' as smonth, 4 as val from dual
     union all
    select '201102' as smonth, 7 as val from dual
     union all
    select '201108' as smonth, 10 as val from dual
)
select a.smonth, 0 as val
  from (select to_char(add_months(to_date(smin,'yyyymm'), rownum),'yyyymm') as smonth
          from (select min(smonth) as smin,
                       max(smonth) as smax
                  from t) t1
         connect by rownum < months_between(to_date(t1.smax, 'yyyymm'), to_date(t1.smin, 'yyyymm'))) a
 where smonth not in(select smonth from t)
 order by smonth;

[520NET]

我想求月的环比增长率，
表
年月 数值
201010 4
201102 7

按月环比结果如下：环比增长=（本月数值-上月数值）/本月数值
年月 数值 环比增长
201010 4 0
201011 0 0
201012 0 0
201101 0 0
201102 7 100
注：年月为字符
求SQL，谢谢！

[gelyon]

with t as(
select '201010' as smonth, 4 as val from dual
union all
select '201102' as smonth, 7 as val from dual
union all
select '201108' as smonth, 10 as val from dual
)
select mon 年月,
       val 数值,
       Decode(val,0,0,(val-lag_val)/val)*100 环比增长 
from (
  select a.mon,nvl(t.val,0) val,Lag(Nvl(t.val,0),1,Nvl(t.val,0))over(order by a.mon) lag_val from(
  select to_char(add_months(m1,level-1),'yyyymm') mon from (
    select min(to_date(smonth,'yyyymm')) m1,max(to_date(smonth,'yyyymm')) m2 from t
  )
  connect by level<=months_between(m2,m1)+1
) a
left join t on a.mon=t.smonth(+)
order by 1
)

年月   数值  环比增长
201010  4   0
201011  0   0
201012  0   0
201101  0   0
201102  7 100
201103  0   0
201104  0   0
201105  0   0
201106  0   0
201107  0   0
201108 10 100