回答編集履歴
2
修正
test
CHANGED
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@@ -14,9 +14,7 @@
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)
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AS(
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AS (
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -6), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -5), 'YYYY/MM') FROM DUAL UNION ALL
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@@ -100,7 +98,7 @@
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WHERE
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cal.ctr <
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cal.ctr <= 5
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)
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1
追記
test
CHANGED
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@@ -1,4 +1,66 @@
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[共通表式](https://www.shift-the-oracle.com/sql/with.html)を使ってみてはいかがでしょうか。
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```sql
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10
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WITH cal (
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mon
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)
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AS(
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -6), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -5), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -4), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -3), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -2), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -1), 'YYYY/MM') FROM DUAL UNION ALL
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE, -0), 'YYYY/MM') FROM DUAL
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)
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SELECT
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cal.mon
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,COUNT(num) AS 合計
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FROM
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cal
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LEFT OUTER JOIN テーブル tl
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ON cal.mon = TO_CHAR(tl.date, 'YYYY/MM')
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GROUP BY
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cal.mon
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ORDER BY
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cal.mon
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;
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```
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再帰を使って記述することもできます。
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2
64
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3
65
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4
66
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@@ -67,3 +129,5 @@
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;
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68
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```
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