回答編集履歴
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修正
answer
CHANGED
@@ -4,6 +4,6 @@
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4
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```sql
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SELECT
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--自社データ(出来ない)
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-
FORMAT_DATE("%Y-%m-%d",DATE_TRUNC(DATE_SUB(DATE(created_at, 'Asia/Tokyo'), INTERVAL 1 MONTH), MONTH)) AS firstday_prev_month, -- 前月初日
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+
FORMAT_DATE("%Y-%m-%d",DATE_TRUNC(DATE_SUB(DATE(TIMESTAMP created_at, 'Asia/Tokyo'), INTERVAL 1 MONTH), MONTH)) AS firstday_prev_month, -- 前月初日
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FROM ***
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```
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