“地理位置”類型不可比。 不能在GROUP BY子句中使用

Question

我有這樣的查詢：

SELECT WorkId, 
RegisterDate , Location

FROM (

SELECT dbo.[Work].WorkId ,
dbo.[Work].RegisterDate , dbo.Look.Location

FROM dbo.Municipality INNER JOIN
dbo.[Work] ON dbo.Municipality .Municipality Id = dbo.[Work].MunicipalityWorkId INNER JOIN
dbo.Look ON dbo.[Work].LookWorkId = dbo.Look.LookId
WHERE (dbo.Look.Location IS NOT NULL) AND Type= 1

) E

GROUP BY WorkId ,RegisterDate , Location

我得到這個錯誤：

類型“地理位置”不可比較。 不能在GROUP BY子句中使用它。

我需要將位置添加到分組依據，因為我需要在數據庫中顯示位置。 對於這種情況有什么解決方案？ 謝謝。

Answer 1

這是一種方法。

使用Stastext將Location轉換為文本，並使用Group by 。 然后使用STGeomFromText將其轉換回Select geo

SELECT WorkId,
       RegisterDate,
       geography::STGeomFromText(Location.STAsText(), 4326)
FROM   (SELECT dbo.[Work].WorkId,
               dbo.[Work].RegisterDate,
               dbo.Look.Location
        FROM   dbo.Municipality
               INNER JOIN dbo.[Work]
                       ON dbo.Municipality.MunicipalityId = dbo.[Work].MunicipalityWorkId
               INNER JOIN dbo.Look
                       ON dbo.[Work].LookWorkId = dbo.Look.LookId
        WHERE  ( dbo.Look.Location IS NOT NULL )
               AND Type = 1) E
GROUP  BY WorkId,
          RegisterDate,
          Location.STAsText() 

從這個答案引用

注意：地理功能區分大小寫 ，應按原樣使用

• STGeomFromText

• STAsText

Answer 2

您未使用求和或計數之類的聚合函數，因此可以避免分組和排序

SELECT 
    WorkId
  , RegisterDate 
  , Location

FROM (
    SELECT 
          dbo.[Work].WorkId 
        , dbo.[Work].RegisterDate 
        , dbo.Look.Location
    FROM dbo.Municipality 
    INNER JOIN dbo.[Work] ON dbo.Municipality.Municipality Id = dbo.[Work].MunicipalityWorkId 
    INNER JOIN dbo.Look ON dbo.[Work].LookWorkId = dbo.Look.LookId
WHERE (dbo.Look.Location IS NOT NULL) AND Type= 1
ORDER  BY WorkId ,RegisterDate , Location
) E