Question

我有一个以前在MS Access中工作得很漂亮的查询，我试图将其作为视图引入SQL Server。问题是两个字段从其他视图中获取其值。这些观点完美无缺。我正试图从这两个领域获得他们的百分比评级。查询类型如下所示：

SELECT dbo.v_IPQueryTotal,
   GEOLOC.City,
   GEOLOC.State,
   dbo.v_IPQueryTotal          AS [Total],
   dbo.v_IPHits                AS [Confirmed],
   [Confirmed] / [Total] * 100 AS Percentage
FROM   GEOLOC,
   v_IPQueryTotal;

Answer 1

使用SQL Server在同一语句中无法引用内联列别名。您需要直接引用列，如下所示：

SELECT
    dbo.v_IPQueryTotal,
    GEOLOC.City,
    GEOLOC.State,
    dbo.v_IPQueryTotal.AllHits AS [Total],
    dbo.v_IPHits.IPHitCount AS [Confirmed],
    dbo.v_IPHits.IPHitCount / dbo.v_IPQueryTotal.AllHits * 100 AS Percentage

FROM
    GEOLOC, v_IPQueryTotal

另一个解决方案是使用内部派生表并在外部查询中引用它们的列：

SELECT
    tmp.*,
    tmp.Confirmed / tmp.Total * 100 AS Percentage

FROM
(
    SELECT
        dbo.v_IPQueryTotal,
        GEOLOC.City,
        GEOLOC.State,
        dbo.v_IPQueryTotal.AllHits AS [Total],
        dbo.v_IPHits.IPHitCount AS [Confirmed]

    FROM
        GEOLOC, v_IPQueryTotal
) tmp

实际上没有定义连接条件因此导致笛卡尔积可能不符合您的预期。

别名在Access中工作，但不在SQL Server中工作

1 个答案: