Question

这是一个脑筋急转弯，我无法解决它。我有一个表格，数据如下所示：

public static void checkClass (Object obj) {
    Class cls = obj.getClass();
    System.out.println("The type of the object is: " + cls.getSimpleName());       
}

我想把这个观点分成两部分。想要选择前12个月，在这种情况下，2017年7月到2018年6月，并以相同的方式显示（当前日历视图）。第2部分：我想选择其余的数据（前12个月除外）并以相同的方式显示。还有另一张表格，其分布要短得多。我的意思是，目前的例子有10年以上，另一个是4年。我想在两个表上应用分发查询。

感谢。

预期产出1

Year    January February    March   April   May June    July    August  September   October November    December
2017    NULL    NULL    NULL    NULL    NULL    NULL    2259.30 1998.72 1790.73 1612.39 1445.99 1275.14
2018    1148.13 997.40  917.40  839.07  778.41  714.67  643.40  590.50  551.88  501.99  445.25  385.54
2019    354.34  315.85  295.80  271.16  252.00  231.18  208.58  190.06  172.44  155.82  138.32  118.72
2020    105.94  87.16   74.55   63.07   50.96   39.12   27.77   23.82   22.38   18.73   12.93   8.15
2021    7.76    6.97    6.82    6.35    6.38    6.39    6.42    6.41    6.38    6.37    5.62    5.70
2022    5.37    4.73    4.60    4.33    4.31    4.40    4.31    4.31    4.35    4.33    4.30    4.40
2023    4.14    3.75    3.66    3.48    3.42    3.50    3.47    3.42    3.50    3.47    3.42    3.50
2024    3.25    2.88    2.80    2.61    2.62    2.57    2.59    2.61    2.62    2.57    2.59    2.61
2025    2.50    2.23    2.23    2.16    2.13    2.20    2.16    2.18    2.18    2.15    2.14    2.22
2026    2.10    1.86    1.85    1.74    1.73    1.74    1.74    1.67    1.77    1.74    1.73    1.74
2027    1.62    1.40    1.40    1.32    1.34    1.24    1.29    1.27    1.37    1.26    1.30    1.30
2028    1.09    0.49    0.30    0.01    NULL    NULL    NULL    NULL    NULL    NULL    NULL    NULL

输出2：

Year    January February    March   April   May June    July    August  September   October November    December
2017    NULL    NULL    NULL    NULL    NULL    NULL    2259.30 1998.72 1790.73 1612.39 1445.99 1275.14
2018    1148.13 997.40  917.40  839.07  778.41  714.67  NULL    NULL    NULL    NULL    NULL    NULL

Answer 1

另一种选择是取消目标子集的转移，然后转动

示例

;with cte as ( Select A.Year ,Mnth = DateName(MONTH,B.Per) ,B.Per ,B.Value From YourTable A Cross Apply ( values (1 ,cast(str(Year)+'-01-01' as date),[January]) ,(2 ,cast(str(Year)+'-02-01' as date),[February]) ,(3 ,cast(str(Year)+'-03-01' as date),[March]) ,(4 ,cast(str(Year)+'-04-01' as date),[April]) ,(5 ,cast(str(Year)+'-05-01' as date),[May]) ,(6 ,cast(str(Year)+'-06-01' as date),[June]) ,(7 ,cast(str(Year)+'-07-01' as date),[July]) ,(8 ,cast(str(Year)+'-08-01' as date),[August]) ,(9 ,cast(str(Year)+'-09-01' as date),[September]) ,(10,cast(str(Year)+'-10-01' as date),[October]) ,(11,cast(str(Year)+'-11-01' as date),[November]) ,(12,cast(str(Year)+'-12-01' as date),[December]) ) B (Mnth,Per,Value) ) , cte2 as ( Select FirstPer = max(Per) from cte where Value is null and Year=(Select min(Year) from cte) ) Select * From ( Select OutPut = case when Per > DateAdd(MONTH,12,FirstPer) then 2 else 1 end ,Year,Mnth,Value From cte Cross Join cte2 ) A Pivot (sum([Value]) For [Mnth] in ([January],[February],[March],[April],[May],[June],[July],[August],[September],[October],[November],[December]) ) p

<强>返回

Answer 2

对于第一部分，您是在寻找这样的查询吗？

Select 
 case when Year = 2017 then null else January end as January,
 case when Year = 2017 then null else February end as February,
 case when Year = 2017 then null else March end as March,
 case when Year = 2017 then null else April end as April,
 case when Year = 2017 then null else May end as May,
 case when Year = 2017 then null else June end as June,
 case when Year = 2018 then null else July end as July,
 case when Year = 2018 then null else August end as August,
 case when Year = 2018 then null else September end as September,
 case when Year = 2018 then null else October end as October,
 case when Year = 2018 then null else November end as November,
 case when Year = 2018 then null else December end as December
from mytable
Where Year in (2017, 2018)

可能不是最好的解决方案，但仍可以完成工作......

选择前12个月的数据

2 个答案: