需要统计“总部”一定范围内的“客户”数量，并以百分比形式显示

Question

这是我当前的查询，但是我不确定为什么会出现错误（查询下方的错误）

SELECT
    DISTINCT COUNT(OperatorAU.*) AS "Total Operators",
100 * (COUNT(OperatorAU.UnderAU) / COUNT(OperatorAU.*) AS "Operators Within 3 AU (%)"
FROM
(
    SELECT DISTINCT 
        Operators.DestionationID AS DestinationID,
        Operators.OperatorName AS OperatorName,
        (ABS(Destinations.SolarCoordinateX) / 5) + (ABS(Destinations.SolarCoordinateY) / 5) AS DistanceInAU,
        CASE
            WHEN (ABS(Destinations.SolarCoordinateX) / 5) + (ABS(Destinations.SolarCoordinateY) / 5) < 3 THEN 1
            ELSE 0
        END AS UnderAU
    FROM Operators
    INNER JOIN Destinations ON Operators.DestinationID = Destinations.DestinationID
    ORDER BY DistanceInAU ASC
) AS OperatorAU;

错误

命令行错误：2 列：31 错误报告 - SQL 错误：ORA-01747：无效的 user.table.column、table.column 或列规范 01747。00000 -“无效的 user.table.column、table.column 或列规范” *原因：
*行动：

这是我正在寻找的结果，提前谢谢你。

总操作员	3 个天文单位内的干员	3 个天文单位内的百分比
100	10	10%

我仔细检查了所有 ID，它们都与我的表格匹配。

Answer 1

该错误是由别名“Operators Within 3 AU (%)”引起的，其名称不符合规则并且缺少一个右括号并且......
无论如何 - 像这样尝试：

SELECT
    COUNT(*) AS "Total_Operators",
    100 * (COUNT(UnderAU) / COUNT(*)) AS "Operators_Within_3_AU_PCT"
FROM
    (
        SELECT  
            Operators.DESTINATION_ID AS DestinationID,
            Operators.OPERATOR_NAME AS OPERATOR_NAME,
            (ABS(Destinations.SOLAR_COORDINATE_X) / 5) + (ABS(Destinations.SOLAR_COORDINATE_Y) / 5) AS DistanceInAU,
            CASE
                WHEN (ABS(Destinations.SOLAR_COORDINATE_X) / 5) + (ABS(Destinations.SOLAR_COORDINATE_Y) / 5) < 3 THEN 1
                ELSE 0
            END AS UnderAU
        FROM Operators
        INNER JOIN Destinations ON Operators.Destination_ID = Destinations.Destination_ID
        ORDER BY DistanceInAU ASC
    ) 

使用此处的示例数据：

WITH
    operators AS
        (
            Select 1 "ID", 'Name 1' "OPERATOR_NAME", 101 "DESTINATION_ID", 'xxx' "SOME OTHER_COLUMN" From Dual Union All
            Select 2 "ID", 'Name 2' "OPERATOR_NAME", 102 "DESTINATION_ID", 'xxx' "SOME OTHER_COLUMN" From Dual Union All
            Select 3 "ID", 'Name 3' "OPERATOR_NAME", 103 "DESTINATION_ID", 'xxx' "SOME OTHER_COLUMN" From Dual 
        ),
    destinations AS
        (
            Select 101 "DESTINATION_ID", 1 "SOLAR_COORDINATE_X", 1.5 "SOLAR_COORDINATE_Y" From Dual Union All
            Select 102 "DESTINATION_ID", 1 "SOLAR_COORDINATE_X", 1.7 "SOLAR_COORDINATE_Y" From Dual Union All
            Select 101 "DESTINATION_ID", 2 "SOLAR_COORDINATE_X", 1.5 "SOLAR_COORDINATE_Y" From Dual Union All
            Select 102 "DESTINATION_ID", 1 "SOLAR_COORDINATE_X", 2   "SOLAR_COORDINATE_Y" From Dual Union All
            Select 103 "DESTINATION_ID", 1 "SOLAR_COORDINATE_X", 2   "SOLAR_COORDINATE_Y" From Dual
        )

...结果将是：

总操作员	Operators_Within_3_AU_PCT
5个	100

样本数据没有意义，它们在这里只是为了显示一些没有错误的结果——您应该根据您的需要调整代码。 您向我们展示了预期结果，但没有向我们展示预期结果的样本数据......
注意：对于更大的数据集，Distinct 关键字可能会提高性能 - 因此，如果没有必要，请不要使用它。