本文来源于《MDX Solutions with Microsoft SQL.Server Analysis Services 2005 and Hyperion Essbase 2nd Edition》一书的内容，主要介绍了一些经常编写的MDX语句的写法。以下MDX语句可以在SSAS的示例库：Adventure Works中运行。例子模型以下的MDX中用到的Hierarchy如下：
百分比1）某个子项占总体的百分比。比如：每种Product的销售额占所有Product销售额的百分比。
WITH MEMBER [Measures].[Sale Amount Ratio] AS'[Measures].[Internet Sales Amount]/([Measures].[Internet Sales Amount], [Product].[Product Categories].[All])' , FORMAT_STRING = '0.00%'SELECT{[Measures].[Internet Sales Amount], [Measures].[Sale Amount Ratio]} ON 0,NON EMPTY [Product].[Product Categories].[Product Name].Members ON 1FROM [Adventure Works]
2）某个子项占其父项的百分比。比如：每种Product的销售额占其所属的SubCategory销售额的百分比。
WITH MEMBER [Measures].[Sale Amount Ratio] AS'[Measures].[Internet Sales Amount]/([Measures].[Internet Sales Amount], [Product].[Product Categories].CurrentMember.Parent)', FORMAT_STRING = '0.00%' SELECT{[Measures].[Internet Sales Amount], [Measures].[Sale Amount Ratio]} ON 0,NON EMPTY CROSSJOIN([Product].[Subcategory].[Subcategory].Members, [Product].[Product Categories].[Product Name].Members) ON 1FROM [Adventure Works]3）某个子项占其祖先的百分比。比如：每种Product的销售额占其所属的Category销售额的百分比。
WITH MEMBER [Measures].[Sale Amount Ratio] AS'[Measures].[Internet Sales Amount]/([Measures].[Internet Sales Amount],ANCESTOR([Product].[Product Categories].CurrentMember, [Product].[Product Categories].[Category]))', FORMAT_STRING = '0.00%' SELECT{[Measures].[Internet Sales Amount], [Measures].[Sale Amount Ratio]} ON 0,NON EMPTY CROSSJOIN([Product].[Category].[Category].Members, [Product].[Product Categories].[Product Name].Members) ON 1FROM [Adventure Works]分配、分摊数量1）根据一个Measure值来分配数量。比如：按照每种Product占总体的销售额多少来分摊成本。
WITH MEMBER [Measures].[Product Cost] AS'([Measures].[Internet Total Product Cost], [Product].[Product Categories].[All])*[Measures].[Internet Sales Amount]/([Measures].[Internet Sales Amount], [Product].[Product Categories].[All])' , FORMAT_STRING = '0.00'SELECT{[Measures].[Internet Sales Amount], [Measures].[Product Cost]} ON 0,NON EMPTY [Product].[Product Categories].[Product Name].Members ON 1FROM [Adventure Works]2）根据一个Hierarchy来分配数量。比如：在Product Hierarchy中计算每种Category的成本的时候，可以根据每种Category下有多少个产品来进行分配。
WITH MEMBER [Measures].[Product Cost] AS'([Measures].[Internet Total Product Cost], [Product].[Product Categories].[All])/Count( Descendants ( [Product].[Product Categories].CurrentMember, [Product].[Product Categories].[Product Name], SELF ), INCLUDEEMPTY)' , FORMAT_STRING = '0.00'SELECT{[Measures].[Internet Sales Amount], [Measures].[Product Cost]} ON 0,NON EMPTY [Product].[Product Categories].[Category].Members ON 1FROM [Adventure Works]平均值1）简单平均值。比如：计算一个月中每天平均的销售额是多少。
WITH MEMBER Measures.[Avg Gross Profit Margin] AS [Measures].[Internet Sales Amount]/ COUNT(Descendants([Ship Date].[Fiscal].CurrentMember, [Ship Date].[Fiscal].[Date]), INCLUDEEMPTY)
SELECT {[Measures].[Internet Sales Amount], Measures.[Avg Gross Profit Margin]} ON COLUMNS, [Ship Date].[Fiscal].[month].Members ON ROWSFROM [Adventure Works]2）加权平均值。没有想到好的例子。
基于时间的计算1）同比和环比。比如：今年每月的销售额和去年同期相比的变化参见: http://blog.sina.com.cn/s/blog_4cd36be30100c7ga.html，这里要补充的是，在同比MDX中，采用COUSIN或ParallelPeriod都可以，但是采用ParallelPeriod更好一些。
2）累计到当前的统计。比如：得到一年中每一个月的累计销售额。
WITH MEMBER Measures.[Additive Internet Sales Amount] AS SUM( PeriodsToDate([Ship Date].[Fiscal].[Fiscal Year],[Ship Date].[Fiscal].CurrentMember), [Measures].[Internet Sales Amount] )SELECT {[Measures].[Internet Sales Amount], Measures.[Additive Internet Sales Amount]} ON COLUMNS, [Ship Date].[Fiscal].[month].Members ON ROWSFROM [Adventure Works]3）移动平均值。比如：计算一种Category过去三个月的平均销售额合计。
WITH MEMBER Measures.[Average Internet Sales Amount] AS AVG(LastPeriods(3, [Date].[Calendar].CurrentMember), [Measures].[Internet Sales Amount])SELECT {[Measures].[Internet Sales Amount], Measures.[Average Internet Sales Amount]} ON COLUMNS, NON EMPTY ([Product].[Product Categories].[Category].Members, DESCENDANTS([Date].[Calendar].[Calendar Year].&[2002], [Date].[Calendar].[Month], SELF) ) ON ROWSFROM [Adventure Works]
总结MDX的表现力非常强大，以上的一些内容希望起到抛砖引玉的作用。
