Question

错误的百分比已应用于字段（TotalPercentageAmount），我需要更正它。给定2个字段Amount和TotalPercentageAmount如何计算应用的百分比？我需要计算应用于TotalPercentageAmount的百分比，并使用正确的百分比更新列。

我创建的小脚本用于模仿我的场景。创建的表包含错误的TotalPercentageAmount !!!

        CREATE TABLE [dbo].[SalesReportTest](
            [Id] [int] NOT NULL,
            [Amount] [decimal](18, 4) NOT NULL,
            [TotalPercentageAmount] [decimal](18, 4) NOT NULL,
         CONSTRAINT [PK_SalesReportTest] PRIMARY KEY CLUSTERED 
        (
            [Id] ASC
        )WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
        ) ON [PRIMARY]


        GO
        SET NOCOUNT ON;
        SET XACT_ABORT ON;
        GO

        BEGIN TRANSACTION;
        INSERT INTO [dbo].[SalesReportTest]([Id], [Amount], [TotalPercentageAmount])
        SELECT 1, 55.0000, 52.0300 UNION ALL
        SELECT 2, 440.0000, 416.2200 UNION ALL
        SELECT 3, 300.0000, 283.8000 UNION ALL
        SELECT 4, -55.0000, -52.0300 UNION ALL
        SELECT 5, 98.0000, 92.7000 UNION ALL
        SELECT 6, -10.0000, -9.4600
        COMMIT;
        RAISERROR (N'[dbo].[SalesReportTest]: Insert Batch: 1.....Done!', 10, 1) WITH NOWAIT;
        GO

Answer 1

您可以尝试以下方法来确定使用的百分比。但是，似乎存在一些精度损失，因为Amount列似乎被截断。我还包括一个用于演示样本数据中5.72％calc的列。

SELECT *, 
    CAST ((Amount / TotalPercentageAmount - 1) * 100 AS DECIMAL (5, 2)) as Pct,
    CAST (TotalPercentageAmount * 1.0572 AS INT) Amt_Calc
FROM [SalesReportTest]

Answer 2

如果我理解正确，您可以更新百分比，如：

update  SalesReportTest
set     TotalPercentageAmount = Amount / 
            (select sum(amount) from SalesReportTest)

计算应用Sql server 2008的百分比

2 个答案: