INTRODUCTION TO MDX

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 WHAT  SQL  CUBE BASICS  MDX  HOW  SELECT, FROM, WHERE, SUBSELECT  SETS, MEMBERS  FUNCTIONS -  Q&A

 Jens Vestergaard  Maersk Line IT – MSBI – Engineering  /

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WHAT!

 SELECT, FROM, WHERE  TWO DIMENSIONAL FORMAT

 SELECT, FROM, WHERE  MULTI DIMENSIONAL FORMAT

 Ordered collection of (at least) one member from one or more dimensions  Simple Tuple  [Date].[Fiscal].[Fiscal Year].&[2005]  If a tuple is composed of members from more than one dimension, the members represented by the tuple must be enclosed in parentheses  ([Date].[Fiscal].[Fiscal Year].&[2005], [Geography].[City].&[Baltimore]&[MD])  A tuple can encompass members in multiple dimensions, as well as multiple members from the same dimension.

 In MDX syntax, tuples are enclosed in braces to construct a set.  A set is an ordered collection of zero, one or more tuples.  {([Date].[Fiscal].[Fiscal Year].&[2005], [Geography].[City].&[Baltimore]&[MD]) , ([Date].[Fiscal].[Fiscal Year].&[2006], [Geography].[City].&[Cincinnati]&[OH])}  A set can contain more than one occurrence of the same tuple.  {[Date].[Fiscal].[Fiscal Year].&[2005], [Date].[Fiscal].[Fiscal Year].&[2005]}  Certain MDX functions accept tuples as parameters, and will raise an error if a single tuple set is passed.  ([Date].[Fiscal].[Fiscal Year].&[2005]) ≠ { [Date].[Fiscal].[Fiscal Year].&[2005] }

HOW?

 CurrentMember  DefaultMember  Anscestor  Cousin  Lag / Lead  NextMember / PrevMember

 SUM / MIN / MAX / AVG / COUNT / DistinctCount  CoalesceEmpty  IIF

 Ancestors  Ascendants  Descendants  SELF, BEFORE, AFTER, BEFORE_AND_AFTER, SELF_AND_AFTER, SELF_AND_BEFORE, SELF_BEFORE_AFTER, LEAVES  Generate  Except  Head / Tail  LastPeriods  MTD / QTD / YTD  Siblings  UNION

 Empty Axis  Minus (-) SET ~ NOT IN  NonEmpty or NON EMPTY  Moving Averages  Date Calculations  IsLeaf  IsAncestor

 Testing Permissions  Testing in Excel  Profiler

Q&AQ&A

 MDX Function Reference:  Stairways to MDX*:  MSDN:  MSSQLTips: learning-sql-server-mdx/ learning-sql-server-mdx/  Literature:  Fast Track to MDX: second/dp/B006V0BNPE/ref=sr_1_2?ie=UTF8&qid= &sr=8- 2&keywords=mdx+fast+trackhttp:// second/dp/B006V0BNPE/ref=sr_1_2?ie=UTF8&qid= &sr=8- 2&keywords=mdx+fast+track  MDX Solutions: ebook/dp/B001KU83FI/ref=sr_1_3?ie=UTF8&qid= &sr=8- 3&keywords=mdx+analysis+serviceshttp:// ebook/dp/B001KU83FI/ref=sr_1_3?ie=UTF8&qid= &sr=8- 3&keywords=mdx+analysis+services  Practical MDX Queries: ebook/dp/B003QP3XGY/ref=pd_sim_351_4?ie=UTF8&refRID=1CNW10TRVP068BDEWJFJ&dpSrc=si ms&dpST=_AC_UL320_SR246%2C320_http:// ebook/dp/B003QP3XGY/ref=pd_sim_351_4?ie=UTF8&refRID=1CNW10TRVP068BDEWJFJ&dpSrc=si ms&dpST=_AC_UL320_SR246%2C320_