我需要对某些数据运行查询，这些数据会带来12个月的总计。我已经对数据执行了平均函数...所以现在我只需要遍历并获得一个移动的12个月的数据周期并将其整理好以便我可以绘制它。
以下是我正在发布的当前查询，但它没有正确添加。基本上我想让1996年1月显示前12个月平均数据的总和。因此，1996年1月将是1995年1月至1995年2月的总和......一直到1995年12月。然后1996年2月将是1995年2月和1995年3月的总和.......
使用Oracle 11g中的OVER功能可以实现吗？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;
以下是几行示例数据以及OVER函数计算的当前方式。
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
这是一个帮助的数据集。
非常感谢您的帮助！ 约什
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);
答案 0 :(得分：1)
我认为您只需要在order by子句中包含年份：
(SUM (AVERAGE_TOTAL_RAINFALL)
OVER (ORDER BY YEAR_DT, MONTH_DT ROWS BETWEEN 12 PRECEDING AND CURRENT ROW)) as "12_MONTH_TOTAL"
答案 1 :(得分：1)
要获得所需的结果，您需要按year_dt列或year_dt和month_dt列的组合订购：
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订购时，分析功能将按以下顺序处理行：
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
产生的结果不符合您的期望。
答案 2 :(得分：0)
这种方法可能会遇到问题。如果您没有特定月份的数据，那么您最终会在第13个月添加数字＆＃34;因为其中一个月＆＃39;数据丢失。
我建议self Join使用between：
Q.MONTH_DT BETWEEN P.MONTH_DT AND ADD_MONTHS(P.MONTH_DT,11)