vault backup: 2025-08-20 14:35:48
Affected files: Too many files to list
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15
21.02. Windows/command.md
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15
21.02. Windows/command.md
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### 取得日期時間
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在 batch 檔裡面可以用 `%date%` 與 `%time%` 來取得日期時間。
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用 `%date:~0,4%` 來擷取特定欄位。
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`~0,4` 表示**從 index 0 開始取 4 位**,所以假設原本 `%date%` 會輸出 `2024/05/29`, `%date:~0,4%` 則會輸出 `2024`。
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取得年、月、日、時、分、秒下:
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```bat
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set YYYY=%date:~0,4%
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set MM=%date:~5,2%
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set DD=%date:~8,2%
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set HOUR=%time:~0,2%
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set MIN=%time:~3,2%
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set SEC=%time:~6,2%
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```
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