Excelで複数の条件にCOUNTIF関数を使う方法
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The Excel COUNTIF and COUNTIFS Functions
ExcelでCOUNTIFS関数を使う方法
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Excel - COUNTIFS with multiple criteria and OR logic
How to use COUNTIF and COUNTIFS in Microsoft Excel
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How to use the COUNTIF function in Excel
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COUNTIF with multiple criteria from same column
Excel 365 の基本 #2: SUMIFS、COUNTIFS、COUNT、COUNTA、ROWS、SUM、IF 関数を使って合計とカウントを行う
Example of using COUNTIFS formula in Excel to count cells based on criteria using wildcards