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會傳回指定數字之平方根的 Double

語法

sqr ( 數字 )

必要 數位 引數 為 Double 或任何大於或等於零的有效 數值運算式 。

查詢範例

Expression

結果​​

SELECT UnitPrice, sqr (UnitPrice) AS SqrUnitPrice FROM ProductSales;

傳回 “UnitPrice” 的值及其在 SqrUnitPrice 欄中的平方根值。

VBA 範例

附註: 下列範例示範如何在 Visual Basic for Applications (VBA) 模組中使用此函數。 如需使用 VBA 的詳細資訊,請在 [搜尋] 旁的下拉式清單中選取 [開發人員參考],並在 [搜尋] 方塊中輸入一個或多個字詞。

此範例使用 Sqr 函數來計算數位的平方根。

Dim MySqr
MySqr = Sqr(4) ' Returns 2.
MySqr = Sqr(23) ' Returns 4.79583152331272.
MySqr = Sqr(0) ' Returns 0.
MySqr = Sqr(-4) ' Generates a run-time error.

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