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Think Outside the Group!

Think Outside the Group!. Erika Bakse @ BakseDoesBI erikasblog.datainspirations.com. Outline. MDX Query With Clause Named Sets Calculated Members “Location” Functions Think Outside the Group!. MDX Query. The basic structure of the MDX query

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Think Outside the Group!

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  1. Think Outside the Group! Erika Bakse @BakseDoesBI erikasblog.datainspirations.com

  2. Outline MDX Query With Clause Named Sets Calculated Members “Location” Functions Think Outside the Group!

  3. MDX Query The basic structure of the MDX query NB: In SSRS queries the columns MUST be measures

  4. Basic Query Syntax SELECT <Set> ON COLUMNS, <Set> ON ROWSFROM <Cube> WHERE <Members>

  5. With Clause Where the fun happens! Create sets, members, measures

  6. With Clause Syntax Add as many calculations as you need in WITH clause WITH MEMBER Measures.MyMeasure AS <expression> SET MySetAS <expression> SELECT <Set> ON COLUMNS, <Set> ON ROWSFROM <Cube> WHERE <Members> Reference calculations directly or indirectly on columns or rows or in WHERE clause

  7. Named Sets WITH MEMBER MemberNameAS <expression> SET MySetAS <expression> SELECT <Set> ON COLUMNS, <Set> ON ROWSFROM <Cube> WHERE <Members>

  8. Named Sets Set expression assigned to an alias Can be used throughout query wherever a set is usable Improve readability Simplify query changes

  9. Demo: Named Sets

  10. Calculated Members WITH MEMBER MemberNameAS <expression> SET MySetAS <expression> SELECT <Set> ON COLUMNS, <Set> ON ROWSFROM <Cube> WHERE <Members>

  11. Calculated Members MemberNameis the fully qualified name of the calculated member, including the dimension Commonly used to create calculated measures Can really be defined as just about anything…

  12. Demo: Dummy Members

  13. “Location” Functions • Where is a tuple “located” in a set? • Rank() • 1-based index • Rank(<TupleExpression>, <SetExpression>) • Return a tuple from a particular location in a set • Item • 0-based index • <SetExpression>.Item(Index)

  14. Demo: Think Outside the Group!

  15. Resources Creating Named Sets http://msdn.microsoft.com/en-us/library/aa216742(v=sql.80).aspx Creating Calculated Members http://msdn.microsoft.com/en-us/library/aa216747(v=SQL.80).aspx MDX Essentials, William Pearson http://www.databasejournal.com/features/mssql/article.php/1495511/MDX-at-First-Glance-Introduction-to-SQL-Server-MDX-Essentials.htm

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