需要优化 MDX 查询

Question

我已经通过 BIDS 查询设计器构建了这个查询。但是我想通过删除最外层 FROM 子句中的 SELECTS 并在 from 子句中只包含多维数据集并在 where 或 filter 子句上进行其余筛选来优化此查询：

    SELECT { [Measures].[User ID Distinct Count], [Measures].[Post Count], [Measures].[Like Count], [Measures].[Comment Count], [Measures].[Impressions Master Count] } ON COLUMNS,
 NON EMPTY { ([Section Master].[Section Name].[Section Name].ALLMEMBERS * [Post Master].[Post Name].[Post Name].ALLMEMBERS * [Post Master].[SP Insert Date].[SP Insert Date].ALLMEMBERS ) } DIMENSION PROPERTIES MEMBER_CAPTION, MEMBER_UNIQUE_NAME ON ROWS 
 FROM ( SELECT ( STRTOSET(@SectionMasterSectionName) ) ON COLUMNS 
        FROM ( SELECT ( STRTOMEMBER(@FromDimDateDate) : STRTOMEMBER(@ToDimDateDate) ) ON COLUMNS 
        FROM [AnalyticsCube])) 
 CELL PROPERTIES VALUE, BACK_COLOR, FORE_COLOR, FORMATTED_VALUE, FORMAT_STRING, FONT_NAME, FONT_SIZE, FONT_FLAGS

我是 MDX 的新手，对 MDX 查询优化了解不多。因此，我也不知道这是查询的优化版本，还是仍有优化的余地。我的立方体结构如图所示。

我已经通过对行和列部分进行一些更改来更新我的旧查询，但仍然坚持从子句部分

SELECT { [Measures].[User ID Distinct Count], 
          [Measures].[Post Count], 
          [Measures].[Like Count], 
          [Measures].[Comment Count], 
          [Measures].[Impressions Master Count] } ON COLUMNS,
NON EMPTY { ([Section Master].[Section Name].CHILDREN) * 
             ([Post Master].[Post Name].CHILDREN, [Post Master].[SP Insert Date].CHILDREN ) } ON ROWS 
FROM ( SELECT ( STRTOSET(@SectionMasterSectionName) ) ON COLUMNS 
       FROM ( SELECT ( STRTOMEMBER(@FromDimDateDate) : STRTOMEMBER(@ToDimDateDate) ) ON COLUMNS 
              FROM [AnalyticsCube]))

Answer 1

这将是最初的简化：

SELECT 
  {
    [Measures].[User ID Distinct Count]
   ,[Measures].[Post Count]
   ,[Measures].[Like Count]
   ,[Measures].[Comment Count]
   ,[Measures].[Impressions Master Count]
  } ON COLUMNS
 ,NON EMPTY 
    {
        [Section Master].[Section Name].Children
      * 
        (
          [Post Master].[Post Name].Children
         ,[Post Master].[SP Insert Date].Children
        )
    } ON ROWS
FROM 
(
  SELECT 
    StrToSet(@SectionMasterSectionName) ON 0,
    StrToMember(@FromDimDateDate) : StrToMember(@ToDimDateDate) ON 1
  FROM [AnalyticsCube]
);

那么我觉得你不把 StrToSet(@SectionMasterSectionName) 移到主 SELECT 子句中似乎很奇怪：

SELECT 
  {
    [Measures].[User ID Distinct Count]
   ,[Measures].[Post Count]
   ,[Measures].[Like Count]
   ,[Measures].[Comment Count]
   ,[Measures].[Impressions Master Count]
  } ON COLUMNS
 ,NON EMPTY 
    {
        StrToSet(@SectionMasterSectionName)
      * 
        (
          [Post Master].[Post Name].Children
         ,[Post Master].[SP Insert Date].Children
        )
    } ON ROWS
FROM 
(
  SELECT 
    StrToMember(@FromDimDateDate) : StrToMember(@ToDimDateDate) ON 0
  FROM [AnalyticsCube]
);

逻辑上略有不同，但您可以考虑使用 WHERE 子句而不是 SUB-SELECT:

SELECT 
  {
    [Measures].[User ID Distinct Count]
   ,[Measures].[Post Count]
   ,[Measures].[Like Count]
   ,[Measures].[Comment Count]
   ,[Measures].[Impressions Master Count]
  } ON COLUMNS
 ,NON EMPTY 
    {
        StrToSet(@SectionMasterSectionName)
      * 
        (
          [Post Master].[Post Name].Children
         ,[Post Master].[SP Insert Date].Children
        )
    } ON ROWS
FROM [AnalyticsCube]
WHERE 
  StrToMember(@FromDimDateDate) : StrToMember(@ToDimDateDate);

需要优化 MDX 查询

Need to optimize MDX Query

optimization

ssas

mdx