Excel を使用して、WEEKNUM と ISOWEEKNUM を使用して日付を週番号に変換する
How to get ISO Week Number by using WEEKNUM function in Excel & Power Bi
Calculating week numbers with WEEKNUM and ISOWEEKNUM (Excel 2013)
【Basic_E004】『日付と表示形式』Excelの日付は「シリアル値」、単なる数字を「表示形式」が貴方のわかる形式に見た目を変えてくれている! Excelの正しい使い方
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