2

我需要对一些带回移动 12 个月总数的数据运行查询。我已经对数据执行了平均函数......所以现在我只需要循环并获得一个移动的 12 个月的数据周期并将其求和，以便我可以绘制它。

下面是我正在发出的当前查询，但它没有正确加起来。基本上我想让 1996 年 1 月显示前 12 个月平均数据的总和。所以 1996 年 1 月将是 1995 年 1 月 + 1995 年 2 月的总和 .... 一直到 1995 年 12 月。那么 1996 年 2 月将是 1995 年 2 月 + 1995 年 3 月的总和 ....

这可以使用 Oracle 11g 中的 OVER 函数吗？似乎是这样，但由于某种原因我没有得到正确的结果。

这是我当前的查询：

/* Formatted on 9/5/2013 3:20:55 PM (QP5 v5.149.1003.31008) */
SELECT MONTH_DT,
     YEAR_DT,
     AVERAGE_TOTAL_RAINFALL,
     (SUM (AVERAGE_TOTAL_RAINFALL)
         OVER (ORDER BY MONTH_DT ROWS BETWEEN 12 PRECEDING AND CURRENT ROW))  as "12_MONTH_TOTAL"
FROM (  SELECT month_dt,
               year_dt,
               TRUNC ( (SUM (tsvalue_ms)
                        / (SELECT COUNT (FEATURE_ID)
                             FROM nexrad.springshed_featureid
                            WHERE springshed_id = 1)), 3)
                  AS average_total_rainfall
          FROM ts_monthly_agg a, nexrad.springshed_featureid b
         WHERE a.FEATURE_ID = b.FEATURE_ID AND b.springshed_id = 1
      GROUP BY year_dt, month_dt
      ORDER BY year_dt, month_dt)
ORDER BY year_dt, month_dt;

这是几行示例数据和 OVER 函数的当前计算方式。

MONTH  YEAR    AVERAGE     12_MONTH_TOTAL
------------------------------------
1     1995     4.31         4.31
2     1995     1.932    27.473
3     1995     3.733    47.523
4     1995     4.216    44.841
5     1995     3.721    31.573
6     1995     8.379    50.459
7     1995     6.028    102.591
8     1995     7.918    105.076
9     1995     3.516    97.507
10    1995     5.623    74.056
11    1995     1.813    30.904
12    1995     1.881    23.03
1     1996     2.625    6.935
2     1996     1.165    27.459
3     1996     9.374    55.274
4     1996     2.84         45.388
5     1996     2.538    32.714
6     1996     5.952    55.483
7     1996     6.562    102.816
8     1996     8.428    108.123
9     1996     3.364    95.583
10    1996     4.222    72.252
11    1996     0.453    31.116
12    1996     4.968    26.6

这是一个有帮助的数据集。

非常感谢您的帮助！乔什

Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 1995, 4.31);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 1995, 1.932);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 1995, 3.733);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 1995, 4.216);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 1995, 3.721);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 1995, 8.379);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 1995, 6.028);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 1995, 7.918);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 1995, 3.516);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 1995, 5.623);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 1995, 1.813);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 1995, 1.881);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 1996, 2.625);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 1996, 1.165);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 1996, 9.374);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 1996, 2.84);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 1996, 2.538);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 1996, 5.952);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 1996, 6.562);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 1996, 8.428);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 1996, 3.364);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 1996, 4.222);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 1996, 0.453);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 1996, 4.968);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 1997, 2.384);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 1997, 0.903);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 1997, 2.575);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 1997, 4.692);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 1997, 1.786);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 1997, 6.301);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 1997, 6.515);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 1997, 5.053);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 1997, 5.01);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 1997, 7.267);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 1997, 4.254);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 1997, 8.082);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 1998, 3.205);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 1998, 10.933);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 1998, 4.298);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 1998, 0.385);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 1998, 1.037);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 1998, 2.544);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 1998, 8.21);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 1998, 6.244);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 1998, 10.461);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 1998, 0.378);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 1998, 1.35);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 1998, 0.969);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 1999, 5.353);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 1999, 1.116);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 1999, 1.749);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 1999, 2.02);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 1999, 2.605);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 1999, 8.07);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 1999, 4.378);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 1999, 7.373);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 1999, 5.294);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 1999, 1.281);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 1999, 1.35);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 1999, 1.279);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2000, 2.217);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2000, 0.862);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2000, 1.45);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2000, 0.698);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2000, 0.205);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2000, 8.584);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2000, 5.381);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2000, 5.288);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2000, 6.026);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2000, 0.241);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2000, 1.398);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2000, 0.814);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2001, 2.005);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2001, 0.953);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2001, 6.8);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2001, 0.648);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2001, 0.484);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2001, 6.337);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2001, 8.872);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2001, 5.446);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2001, 8.764);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2001, 0.532);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2001, 0.842);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2001, 1.388);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2002, 1.179);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2002, 1.623);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2002, 2.293);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2002, 1.397);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2002, 0.928);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2002, 9.158);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2002, 7.98);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2002, 8.007);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2002, 4.902);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2002, 2.282);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2002, 3.611);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2002, 7.606);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2003, 0.172);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2003, 4.871);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2003, 7.315);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2003, 1.408);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2003, 3.083);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2003, 12.093);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2003, 5.617);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2003, 6.838);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2003, 3.103);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2003, 2.773);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2003, 1.191);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2003, 0.658);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2004, 1.769);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2004, 5.733);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2004, 1.565);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2004, 1.688);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2004, 1.694);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2004, 7.389);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2004, 9.441);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2004, 7.223);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2004, 18.424);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2004, 2.368);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2004, 2.131);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2004, 1.699);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2005, 0.958);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2005, 2.1);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2005, 6.085);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2005, 6.194);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2005, 5.947);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2005, 10.413);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2005, 11.105);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2005, 11.823);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2005, 2.737);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2005, 4.933);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2005, 2.659);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2005, 4.525);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2006, 1.48);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2006, 6.679);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2006, 0.261);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2006, 2.652);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2006, 2.194);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2006, 6.536);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2006, 7.587);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2006, 8.422);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2006, 5.141);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2006, 1.583);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2006, 1.845);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2006, 4.588);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2007, 3.543);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2007, 5.29);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2007, 2.623);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2007, 1.931);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2007, 1.404);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2007, 5.479);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2007, 10.63);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2007, 5.385);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2007, 6.448);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2007, 6.419);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2007, 0.845);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2007, 2.127);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2008, 3.357);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2008, 4.253);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2008, 5.22);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2008, 2.192);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2008, 0.541);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2008, 8.029);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2008, 9.963);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2008, 13.26);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2008, 2.199);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2008, 1.179);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2008, 1.49);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2008, 0.69);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2009, 3.007);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2009, 1.456);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2009, 1.693);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2009, 2.359);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2009, 10.714);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2009, 5.592);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2009, 8.076);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2009, 5.85);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2009, 4.032);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2009, 1.501);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2009, 3.027);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2009, 2.909);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2010, 3.812);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2010, 5.226);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2010, 6.655);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2010, 1.09);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2010, 5.203);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2010, 5.846);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2010, 6.793);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2010, 9.743);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2010, 2.599);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2010, 0.01);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2010, 0.94);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2010, 0.677);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2011, 4.928);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2011, 2.23);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2011, 3.986);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2011, 2.12);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2011, 2.214);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2011, 5.476);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (7, 2011, 5.713);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (8, 2011, 6.706);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (9, 2011, 4.058);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (10, 2011, 5.27);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (11, 2011, 1.17);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2011, 0.363);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2012, 1.034);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2012, 2.375);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2012, 2.148);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2012, 1.658);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2012, 5.773);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (6, 2012, 14.215);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (12, 2012, 3.889);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (1, 2013, 0.302);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (2, 2013, 1.954);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (3, 2013, 0.781);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (4, 2013, 3.163);
Insert into RAINFALL_DATA
   (MONTH_DT, YEAR_DT, AVERAGE_TOTAL_RAINFALL)
 Values
   (5, 2013, 2.385);
4

3 回答 3

2

要获得所需的结果，您需要按year_dt列或year_dt和month_dt列的组合排序：

 select month_dt
      , year_dt
      , average_total_rainfall
      , sum(average_total_rainfall) over(order by year_dt, month_dt 
                                          rows between 12 preceding 
                                               and current row) res
  from rainfall_data



MONTH_DT    YEAR_DT AVERAGE_TOTAL_RAINFALL        RES
---------- ---------- ---------------------- ----------
     1       1995                   4,31       4,31
     2       1995                  1,932      6,242
     3       1995                  3,733      9,975
     4       1995                  4,216     14,191
     5       1995                  3,721     17,912
     6       1995                  8,379     26,291
     7       1995                  6,028     32,319
     8       1995                  7,918     40,237
     9       1995                  3,516     43,753
    10       1995                  5,623     49,376
    11       1995                  1,813     51,189
    12       1995                  1,881      53,07
     1       1996                  2,625     55,695
     2       1996                  1,165      52,55
     3       1996                  9,374     59,992
     4       1996                   2,84     59,099
     5       1996                  2,538     57,421
     6       1996                  5,952     59,652
     7       1996                  6,562     57,835
     8       1996                  8,428     60,235

当您仅按month_dt行排序时，分析函数将按以下顺序处理：

month_dt year_dt   average
--------------------------
1        1995   4.31
1        1996   2.625
1        1997   2.384
1        1998   3.205
1        1999   5.353
1        2000   2.217
1        2001   2.005
1        2002   1.179
1        2003   0.172
1        2004   1.769
1        2005   0.958
1        2006   1.48
1        2007   3.543

产生不符合您期望的结果。

于 2013-09-05T19:57:52.217 回答
1

我认为您只需要在order by条款中包含年份：

 (SUM (AVERAGE_TOTAL_RAINFALL)
     OVER (ORDER BY YEAR_DT, MONTH_DT ROWS BETWEEN 12 PRECEDING AND CURRENT ROW))  as "12_MONTH_TOTAL"
于 2013-09-05T19:55:34.730 回答
0

您可能会遇到这种方法的问题。如果您没有特定月份的数据，那么您最终会添加“第 13 个月”的数字，因为其中一个月份的数据丢失了。

我会建议self Join一个between：

Q.MONTH_DT BETWEEN P.MONTH_DT AND ADD_MONTHS(P.MONTH_DT,11)
于 2017-06-19T12:14:42.993 回答