Question

是否可以通过动态创建的列来排序（我希望按 AreaPriority 排序，但是使用此查询我得到错误无效的列名：AreaPriority，当我在SQL Server管理中运行此查询时工作室一切正常，但在petapoco运行错误）。以下是此选择查询：

SELECT strGet.StrengthId as AreaId, strGet.[Description] as AreaName,
(SELECT SUM(ias.Score) FROM ImprovementAreaScore ias WHERE ias.StrengthId=strGet.StrengthId) as AreaPriority
FROM
{0}.Strength strGet
WHERE
strGet.[Description] like '%' + @0 and strGet.SelfAssessmentId=@1 and strGet.IsStrength=0 and strGet.ToImprovementProject=1 ORDER BY AreaPriority", ...

Answer 1

我很确定你不能在列列表中添加一个子选择。

你应该加入....

SELECT 
    strGet.StrengthId as AreaId, 
    strGet.[Description] as AreaName, 
    SUM(ias.Score) as AreaPriority

FROM {0}.Strength strGet

JOIN ImprovementAreaScore as ias ON ias.StrengthId=strGet.StrengthId

WHERE
    strGet.[Description] like '%' + @0 
and strGet.SelfAssessmentId=@1 
and strGet.IsStrength=0 
and strGet.ToImprovementProject=1 

ORDER BY AreaPriority", ...

Answer 2

获得不同的结果是很奇怪的，因为PetaPoco它只通过ADO.net运行查询，但您可以通过表达式（而不是列名称）解决问题排序，就像在旧的SQL版本中一样：

SELECT strGet.StrengthId as AreaId, strGet.[Description] as AreaName,
(SELECT SUM(ias.Score) FROM ImprovementAreaScore ias WHERE ias.StrengthId=strGet.StrengthId) as AreaPriority
FROM
{0}.Strength strGet
WHERE
strGet.[Description] like '%' + @0 and strGet.SelfAssessmentId=@1 and strGet.IsStrength=0 and strGet.ToImprovementProject=1 
ORDER BY (SELECT SUM(ias.Score) FROM ImprovementAreaScore ias WHERE ias.StrengthId=strGet.StrengthId)",

PetaPoco Orderby动态创建列

2 个答案: