我的表格如下所示：
Accountno | MonthPeriod | YearPeriod | Value | StartYear | StartMonth | EndYear | Endmonth
---------- ------------- ------------ ------- ----------- ------------ --------- --------
210 4 2015 100 2015 1 2016 5
210 2 2016 200 2015 1 2016 5
300 4 2015 50 2015 1 2016 5
300 2 2016 100 2015 1 2016 5
我正在寻找一种方法来填补startmonth / startyear和endmonth / endyear之间缺少的月份和年份，其中新填充的条目的值将是先前填充的值 - 如果这样做会向后填充值任何意义？并且对于endyear / endmonth的条目，accountno的最后一个值（作为下面所需的输出表）
Accountno | MonthPeriod | YearPeriod | Value | StartYear | StartMonth | EndYear | Endmonth
---------- ------------- ------------ ------- ----------- ------------ --------- --------
210 1 2015 100 2015 1 2016 5
210 2 2015 100 2015 1 2016 5
210 3 2015 100 2015 1 2016 5
210 4 2015 200 2015 1 2016 5
210 5 2015 200 2015 1 2016 5
210 6 2015 200 2015 1 2016 5
210 7 2015 200 2015 1 2016 5
210 8 2015 200 2015 1 2016 5
210 9 2015 200 2015 1 2016 5
210 10 2015 200 2015 1 2016 5
210 11 2015 200 2015 1 2016 5
210 12 2015 200 2015 1 2016 5
210 1 2016 200 2015 1 2016 5
210 2 2016 200 2015 1 2016 5
210 3 2016 200 2015 1 2016 5
210 4 2016 200 2015 1 2016 5
210 5 2016 200 2015 1 2016 5
300 1 2015 50 2015 1 2016 5
300 2 2015 50 2015 1 2016 5
300 3 2015 50 2015 1 2016 5
300 4 2015 50 2015 1 2016 5
300 5 2015 100 2015 1 2016 5
300 6 2015 100 2015 1 2016 5
300 7 2015 100 2015 1 2016 5
300 8 2015 100 2015 1 2016 5
300 9 2015 100 2015 1 2016 5
300 10 2015 100 2015 1 2016 5
300 11 2015 100 2015 1 2016 5
300 12 2015 100 2015 1 2016 5
300 1 2016 100 2015 1 2016 5
300 2 2016 100 2015 1 2016 5
300 3 2016 100 2015 1 2016 5
300 4 2016 100 2015 1 2016 5
300 5 2016 100 2015 1 2016 5
我尝试为我的情况操作以下代码，但没有超过：
CREATE TABLE TEST( Month tinyint, Year int, Value int)
INSERT INTO TEST(Month, Year, Value)
VALUES
(1,2013,100),
(4,2013,101),
(8,2013,102),
(2,2014,103),
(4,2014,104)
DECLARE @Months Table(Month tinyint)
Insert into @Months(Month)Values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10), (11),(12);
With tblValues as (
select Rank() Over (ORDER BY y.Year, m.Month) as [Rank],
m.Month,
y.Year,
t.Value
from @Months m
CROSS JOIN ( Select Distinct Year from Test ) y
LEFT JOIN Test t on t.Month = m.Month and t.Year = y.Year
)
Select t.Month, t.Year, COALESCE(t.Value, t1.Value) as Value
from tblValues t
left join tblValues t1 on t1.Rank = (
Select Max(tmax.Rank)
From tblValues tmax
Where tmax.Rank < t.Rank AND tmax.Value is not null)
Order by t.Year, t.Month
非常感谢任何帮助！