オラクル DB: SQL_FIDDLE
それはカウントと週の始まりについてです：
Table_1 に計画とその開始日を示します。
表 2 には、表 1 の期間と対応する計画がリストされています。
選択
select
t2.PERIOD
,'WEEK_NUMBER ' || to_char(t1.START_DATE +((t2.PERIOD-1) * 7), 'iw') Week
,to_char(t1.START_DATE + ((t2.PERIOD-1) * 7), 'YYYY-MM-DD') Period_Start
from TABLE_1 t1
join
TABLE_2 t2
on t1.PLAN = t2.PLAN
以下を出力します。
+--------+----------------+--------------+
| PERIOD | WEEK | PERIOD_START |
+--------+----------------+--------------+
| 1 | WEEK_NUMBER 18 | 2020-05-01 |
| 2 | WEEK_NUMBER 19 | 2020-05-08 |
| 3 | WEEK_NUMBER 20 | 2020-05-15 |
| 4 | WEEK_NUMBER 21 | 2020-05-22 |
| 5 | WEEK_NUMBER 22 | 2020-05-29 |
| 6 | WEEK_NUMBER 23 | 2020-06-05 |
| 7 | WEEK_NUMBER 24 | 2020-06-12 |
| 8 | WEEK_NUMBER 25 | 2020-06-19 |
+--------+----------------+--------------+
質問: 1 か月の休憩がある期間を除いて、各期間は 7 日である必要があります。期間に月の休憩が含まれる場合は、その月の最終日に移動し、残りは翌月の新しい期間として継続する必要があります。週番号と期間番号を調整する必要があります。
例：
+--------+----------------+--------------+
| PERIOD | WEEK | PERIOD_START |
+--------+----------------+--------------+
| 1 | WEEK_NUMBER 18 | 2020-05-01 |
| 2 | WEEK_NUMBER 19 | 2020-05-08 |
| 3 | WEEK_NUMBER 20 | 2020-05-15 |
| 4 | WEEK_NUMBER 21 | 2020-05-22 |
| 5 | WEEK_NUMBER 22 | 2020-05-29 |< --- period part before new month
| 6 | WEEK_NUMBER 23 | 2020-06-01 |< --- period part after new month
| 7 | WEEK_NUMBER 23 | 2020-06-05 |
| 8 | WEEK_NUMBER 24 | 2020-06-12 |
| 9 | WEEK_NUMBER 25 | 2020-06-19 |
+--------+----------------+--------------+
ここで推奨される手順はどれですか?
私は別のSQL_FIDDLEを adional ピリオドで追加しました:
+--------+----------------+--------------+
| PERIOD | WEEK | PERIOD_START |
+--------+----------------+--------------+
| 1 | WEEK_NUMBER 23 | 2020-06-01 |
| 2 | WEEK_NUMBER 24 | 2020-06-08 |
| 3 | WEEK_NUMBER 25 | 2020-06-15 |
| 4 | WEEK_NUMBER 26 | 2020-06-22 |
| 5 | WEEK_NUMBER 22 | 2020-05-29 |< --- period part before new month
| 6 | WEEK_NUMBER 23 | 2020-06-01 |< --- period part after new month (Week_Number has changed)
| 6 | WEEK_NUMBER 28 | 2020-07-06 |
| 7 | WEEK_NUMBER 29 | 2020-07-13 |
| 8 | WEEK_NUMBER 30 | 2020-07-20 |
| 9 | WEEK_NUMBER 31 | 2020-07-27 |< --- period part before new month
| 10 | WEEK_NUMBER 31 | 2020-08-01 |< --- period part afternew month (Week_Number has not changed)
| 11 | WEEK_NUMBER 32 | 2020-08-03 |
| 12 | WEEK_NUMBER 33 | 2020-08-10 |
| 13 | WEEK_NUMBER 34 | 2020-08-17 |
| 14 | WEEK_NUMBER 35 | 2020-08-24 |
| 15 | WEEK_NUMBER 36 | 2020-08-31 |< --- period part before new month
| 16 | WEEK_NUMBER 36 | 2020-09-01 |< --- period part before new month (Week_Number has not changed)
| 15 | WEEK_NUMBER 37 | 2020-09-07 |
| 16 | WEEK_NUMBER 38 | 2020-09-14 |
+--------+----------------+--------------+