Question

我的数据库中有一个数据表，如下所示：

year    month   sales   mom       qoq   yoy
----------------
2010    1   80  -     - -
2010    2   61  -23.75%   - -
2010    3   81  32.79%    - -
2010    4   94  16.05%      -
2010    5   77  -18.09%     -
2010    6   75  -2.60%      -
2010    7   58  -22.67%     -
2010    8   74  27.59%      -
2010    9   98  32.43%      -
2010    10  97  -1.02%      -
2010    11  94  -3.09%      -
2010    12  63  -32.98%     -
2011    1   61  -3.17%      -23.75%
2011    2   79  29.51%      29.51%
2011    3   84  6.33%       3.70%
2011    4   100 19.05%      6.38%
2011    5   78  -22.00%     1.30%
2011    6   99  26.92%      32.00%
2011    7   78  -21.21%     34.48%
2011    8   63  -19.23%     -14.86%
2011    9   66  4.76%       -32.65%
2011    10  77  16.67%      -20.62%
2011    11  93  20.78%      -1.06%
2011    12  94  1.08%       49.21%

我想计算每个月（每行）的月度，季度和年度销售百分比变化，，如上面最后3列所示。
如何在一个使用T-SQL的结果集中实现此目的？我正在使用SQL Server 2008 R2。感谢。

Answer 1

此查询仅适用于MSSQL2012，但它的计划和执行时间要好得多

SELECT
    year,
    month,
    sales,
    (sales - LAG(sales, 1) over (ORDER BY year, month)) / LAG(sales, 1) over (ORDER BY year, month)*100 AS mom,
    (sales - LAG(sales, 4) over (ORDER BY year, month)) / LAG(sales, 4) over (ORDER BY year, month)*100 AS qoq,
    (sales - LAG(sales, 12) over (ORDER BY year, month)) / LAG(sales, 12) over (ORDER BY year, month)*100 AS yoy
FROM @tab

Answer 2

在这里使用带有LAG的窗口函数会很不错，但它仅适用于MSSQL2012。所以我使用row_number

declare @tab table (year int, month int, sales money)

insert into @tab values
(2010, 1, 80 ),(2010, 2, 61 ),(2010, 3, 81 ),
(2010, 4, 94 ),(2010, 5, 77 ),(2010, 6, 75 ),
(2010, 7, 58 ),(2010, 8, 74 ),(2010, 9, 98 ),
(2010, 10,  97 ),(2010, 11,  94 ),(2010, 12,  63 ),
(2011, 1, 61 ),(2011, 2, 79 ),(2011, 3, 84 ),
(2011, 4, 100),(2011, 5, 78 ),(2011, 6, 99 ),
(2011, 7, 78 ),(2011, 8, 63 ),(2011, 9, 66 ),
(2011, 10,  77 ),(2011, 11,  93 ),(2011, 12,  94 );

with cte as (
    select
        row_number() over (order by year, month) rn,
        year,
        month,
        sales
    from @tab
)
select
    year,
    month,
    sales,
    round((sales-(select sales from cte where cte.rn=t1.rn-1))/(select sales from cte where cte.rn=t1.rn-1)*100.0,2) as mom,
    round((sales-(select sales from cte where cte.rn=t1.rn-4))/(select sales from cte where cte.rn=t1.rn-4)*100.0,2) as qoq,
    round((sales-(select sales from cte where cte.rn=t1.rn-12))/(select sales from cte where cte.rn=t1.rn-12)*100.0,2) as yoy
from cte as t1

SQL - 如何计算百分比变化/增长

2 个答案: