1. Atlanta.MDF MDX Overview

2. What Is MDX? MDX is Multi Dimensional EXpressions MDX is the syntax for querying an Analysis Services database MDX is part of the OLE DB for OLAP spec MDX is the key for all advanced analytical capabilities of Analysis Services

3. Comparison To SQL SQL ConstructOLAP construct SELECT…SELECT… (MDX) CREATE…DSO object model DROP… INSERT… DELETE…

4. MDX Basics MDX allows easy navigation in the multi dimensional space It “understands” the MD concepts of cube, dimension, level, member and cell It is used for –Queries – full statements (SELECT…FROM) –Business modeling – defining calculated members using MDX Expressions – not a full statement

5. MDX Queries vs. MDX Expressions MDX Queries –Full statements (SELECT…FROM) –Usually generated by a query tools and applications such as Excel –MDX Sample App deals in queries MDX Expressions –Partial MDX statements –Define a calculated member, or a set, or member properties, etc. –Returns a single value (which may be a set)

6. MDX Myth Fact: MDX is used everywhere: Calculated members Calculated members Security settings Security settings Custom member rollup Custom member rollup Custom level rollup Custom level rollup Actions Actions Define named “Sets” Define named “Sets” Calculated cells Calculated cells “Only developers need to know MDX”

7. MDX Constructs Members: an item in a hierarchy –[John Doe] –[2001] –[2001].[Q1].[Jan] Tuple: an intersection of 2 or more members –([Product].[Drink].[Beverages], [Customers].[USA]) –([Product].[Non-Consumable], [2001]) Sets: a group of tuples or members –{[John Doe], [Jane Doe]} –{ ( [Non-Consumable], USA ), ( Beverages, Mexico ) } –[2001].Children –TopCount(Store.[Store Name]. Members, 10, Sales)

8. Groceries Clothing Appliances Sales Cost Units Every Cell Has A Name... 1999 2000 2001 1998 1997 Measures Time Products

9. Groceries Clothing Appliances Sales Cost Units (Products.Clothing, Measures.Units, Time.[2000]) Every Cell Has A Name... 1999 2000 2001 1998 1997 Measures Time Products

10. Groceries Clothing Appliances Sales Cost Units (Products.Clothing, Measures.Units, Time.[2000]) (Products.Clothing, Measures.Sales, Time.[1999]) Every Cell Has A Name... 1999 2000 2001 1998 1997 Measures Time Products

11. Groceries Clothing Appliances Sales Cost Units (Products.Clothing, Measures.Units, Time.[2000]) (Products.Clothing, Measures.Sales, Time.[1999]) (Products.Groceries, Measures.Cost, Time.Year.[1997]) Every Cell Has A Name... 1999 2000 2001 1998 1997 Measures Time Products

12. 1999 2000 2001 Groceries Clothing Appliances SalesCostUnits (Products.Clothing, Measures.Units, Time.[2000]) = (Products.CurrentMember, Measures.CurrentMember, Time.CurrentMember) 1998 1997 The Current Cell: Currentmember

13. 2000 Clothing Sales ? Naming Cells With Relative References...

14. 2000 Clothing Sales ? ? (Products.Clothing, Measures.Sales, Time.[2000].PrevMember)

15. 2000 Clothing Sales ? ? ? Naming Cells With Relative References... (Products.Clothing, Measures.Sales, Time.[2000].PrevMember) (Products.Clothing, Measures.Sales, Time.[2000].NextMember)

16. (Products.Clothing, Measures.Sales.PrevMember, Time.[2000].Lag(3)) 2000 Clothing Sales ? ? ? Naming Cells With Relative References... (Products.Clothing, Measures.Sales, Time.[2000].PrevMember) (Products.Clothing, Measures.Sales, Time.[2000].NextMember) OR(Products.Clothing,Measures.Sales.PrevMember, Time.[2000].Lead(-3))

17. Calculated Members Calculated members add significant power to Analysis cubes Pre-define complex business logic Pre-define complex business logic Usually create calculated measures Usually create calculated measures Computed at run- time Computed at run- time

18. 1. How Did Sales This Period Compare With Sales In The Previous Period? YearQtrMonSales 2000790 Q1120 Jan30 Feb40 Mar50 Q2200 Apr65 May45 Jun90 Q3185 Jul55 Aug60 Sep70 Q4285 Oct80 Nov100 Dec105

19. QtrMonSalesDelta Q220080 Apr6515 May45-20 Jun9045 1. How Did Sales This Period Compare With Sales In The Previous Period? (Time.CurrentMember, Measures.CurrentMember) =

20. QtrMonSalesDelta Q220080 Apr6515 May45-20 Jun9045 1. How Did Sales This Period Compare With Sales In The Previous Period? (Time.CurrentMember, Measures.CurrentMember) = (Time.CurrentMember, Measures.Sales) -

21. QtrMonSalesDelta Q220080 Apr6515 May45-20 Jun9045 (Time.CurrentMember.PrevMember, Measures.Sales) 1. How Did Sales This Period Compare With Sales In The Previous Period? (Time.CurrentMember, Measures.CurrentMember) = (Time.CurrentMember, Measures.Sales) -

22. YearQtrMonSalesDelta 2000790 Q1120 Jan30 Feb4010 Mar5010 Q220080 Apr6515 May45-20 Jun9045 Q3185-15 Jul55-35 Aug6015 Sep7010 Q4285100 Oct8010 Nov10020 Dec1055 Results For Question 1:

23. 2. How Did Sales In The Current Period Compare With Sales In The Same Period Last Year? YearQtrMonSales 2000790 Q1120 Jan30 Feb40 Mar50 Q4285 Oct80 Nov100 Dec105 2001850 Q1170 Jan50 Feb55 Mar65 Q4275 Oct90 Nov100 Dec85

24. YearQtrMonSalesAnnual Delta 2000790 Q1120 Jan30 Feb40 Mar50 2001850 Q1170 Jan5020 Feb55 Mar65 2. How Did Sales In The Current Period Compare With Sales In The Same Period Last Year? (Time.CurrentMember, Measures.Sales)- (Time.CurrentMember.Lag(12), Measures.Sales)

25. YearQtrMonSalesAnnual Delta 2000790 Q1120 Jan30 Feb40 Mar50 2001850 Q1170 Jan5020 Feb55 Mar65 2. How Did Sales In The Current Period Compare With Sales In The Same Period Last Year? (ParallelPeriod(Year,1,Time.CurrentMember), Measures.Sales) (Time.CurrentMember,Lag(12), Measures.Sales) (Time.CurrentMember, Measures.Sales)-

26. YearQtrMonSalesAnn. Delta 2000790 Q1120 Jan30 Feb40 Mar50 Q4285 Oct80 Nov100 Dec105 200185060 Q117050 Jan5020 Feb5515 Mar6515 Q4275-10 Oct9010 Nov1000 Dec85-20 Results For Question 2:

27. 3. What Have My Sales Been Since The Beginning Of The Year? YearQtrMonSales 2000790 Q1120 Jan30 Feb40 Mar50 Q2200 Apr65 May45 Jun90 Q3185 Jul55 Aug60 Sep70 Q4285 Oct80 Nov100 Dec105

28. Time.Mar,Measures.Sales... Time.Jan,Measures.Sales + Time.Feb,Measures.Sales+ 3. What Have Sales Been Since The Beginning Of The Year? YearQtrMonSalesYTD 2000790 Q1120 Jan30 Feb4070 Mar50120

29. Time.Mar,Measures.Sales Time.Jan,Measures.Sales + Time.Feb,Measures.Sales+ 3. What Have Sales Been Since The Beginning Of The Year? = Sum(YTD(Time.CurrentMember), Sales) YearQtrMonSalesYTD 2000790 Q1120 Jan30 Feb4070 Mar50120

30. YearQtrMonSalesYTD 2000790 Q1120 Jan30 Feb4070 Mar50120 Q2200320 Apr65185 May45230 Jun90320 Q3185505 Jul55375 Aug60435 Sep70505 Q4285790 Oct80585 Nov100685 Dec105790 Results For Question 3:

31. Questions