Question

我尝试使用round函数将例如348.426580转换为348.43
但在下面的查询中，我使用的结果是348.430000列

中的[ShippingCost]

如何省略四个零？

SELECT  S.Product_Name, 
        SPD.UnitPrice, 
        SPD.Quantity, 
        SPD.Quantity * SPD.UnitPrice Amount,
        CONVERT(INT,(SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * 100) [Cost %],
        ROUND((SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * Sp.Shipping_Cost,2) [ShippingCost],
        (SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * Sp.Customs_Cost [CustomsCost],
        (SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * Sp.Shipping_Cost + (SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * Sp.Customs_Cost +SPD.Quantity * SPD.UnitPrice - SpD.Discount [TotalAmount]
FROM dbo.Stock_Purchase SP
INNER JOIN dbo.Stock_Purchase_Details SPD
    ON SP.Purchase_ID = SPD.Purchase_ID 
INNER JOIN dbo.Store S
    ON SPD.Pro_ID = S.Pro_ID;

Answer 1

您可以转换为小数，例如DECIMAL(10, 2)。由于强制转换会自动进行舍入，因此不需要round()：

    CAST((SPD.Quantity * SPD.UnitPrice)/(SUM(SPD.Quantity * SPD.UnitPrice) OVER()) * Sp.Shipping_Cost as decimal(10, 2)) as [ShippingCost],

Answer 2

Scanner in = new Scanner(System.in);
String[] input = new String[1000];
String[] output = new String[1000];
int x = 0;// All purpose counter
int y = 0;//Second purpose counter
boolean ends = false;
boolean starts = false;
/**
 * This method is supposed to take the dna array and create an rna array from it to return
 * to the main method wherever this method is called.
 * 
 * @param  String[] input     The array that contains the dna sequence
 * @return String[] output    The array that contains the mRNA we just created in this method
 */
public void makeRNA()
{
    System.out.println("Enter a simple DNA Sequence, make sure the amount of variables are a multiple of 3.");
    String something = in.nextLine();
    while(x < 1000)
    {
        if(something.indexOf(x) = "a")
        {
            output[x] = "u";
        }
        else if(input[x] == "c")
        {
            output[x] = "g";
        }
        else if(input[x] == "g")
        {
            output[x] = "c";
        }
        else if(input[x] == "t")
        {
            output[x] = "a";
        }            
        x++;
    }
    for(x = 0 ; x < 1000; x++)
    {
        System.out.println(output[x]);
    }

}

column_name要舍入的字段必需。

decimals必需指定要返回的小数位数。

See这个。

SQL ROUND（）函数问题

2 个答案: