1. Write DAX Queries using DAX Studio Alex Barbeau alex.barbeau@gnetgroup.com

2. Let’s get started 10/10/2015Write DAX Queries using DAX Studio2 |  Thank you Sponsors! o Please visit the sponsors during the vendor break from 2:45 – 3:15 and enter their end-of-day raffles  Event After Party o Dave and Buster’s in Southdale Center. 3 rd floor by Macy’s starting at 6:15  Want More Free Training? o PassMN meets the 3 rd Tuesday of every month. https://mnssug.org/ https://mnssug.org/

3. Agenda  Why Query with DAX?  DAX Studio  Demos!  Questions? 3 |10/10/2015Write DAX Queries using DAX Studio3 |

4. DAX is a Query Language??  Indeed it is!  Measures are just one (very important) piece  It’s tables all the way down  Vectors and Matrices are a good theoretical start  A query returns a table  Queries are natively ‘Grouped By’ 4 |10/10/2015Write DAX Queries using DAX Studio4 |

5. Why Query Power BI/Tabular  You need a data source for:  Datazen  SSRS  SQL Server Reporting Services  External Reporting Tool  Your own self-service BI from existing models  Need to extract data from Power BI Desktop  DAX Development  Great way expand understanding of DAX 5 |10/10/2015Write DAX Queries using DAX Studio5 |

6. Note on Terminology  By Tabular I am referring to the framework behind the following software:  SSAS Tabular 2012-2016  Power Pivot in Excel 2010-2016  Power BI Desktop  Query structure is the same in all  Queries will use standard ‘Table’[Column] references and [Measure] references 6 |10/10/2015Write DAX Queries using DAX Studio6 |

7. Please ask Questions  Odds are others have similar questions  A full response may be delayed till a later slide  Some queries may be deliberately poorly written to demonstrate concepts and syntax  Basic familiarity with DAX assumed here-on  Columnar storage  CALCULATE(), VALUES(), FILTER() 7 |10/10/2015Write DAX Queries using DAX Studio7 |

8. DAX Development  Write queries and develop measures against a new or existing model  Power Pivot  Visual Studio  SSMS  SQL Server Management Studio  Excel (2013+)  Edit DAX from a table  Bit of an involved process  DAX Studio 8 |10/10/2015Write DAX Queries using DAX Studio8 |

9. DAX Studio  It Queries!  It Formats!  It Traces! 9 |10/10/2015Write DAX Queries using DAX Studio9 |

10. DAX Studio  Open Source tool for querying Tabular models  http://daxstudio.codeplex.com/ http://daxstudio.codeplex.com/  Developed (principally) by  Darren Gosbell  Marco Russo  Query Excel, Tabular, and Power BI Desktop  Let the team know what you think! 10 |10/10/2015Write DAX Queries using DAX Studio10 |

11. Today’s Model 11 |10/10/2015Write DAX Queries using DAX Studio11 |  Adventure Works Internet Sales

12. EVALUATE  Think of this like SELECT  Does nothing without an expression to  Wait for it  EVALUATE 12 |10/10/2015Write DAX Queries using DAX Studio12 |

13. ROW()  Return a row of values  ROW(, [,,,…])  is any “text within quotes”  is any DAX expression that returns a scalar 13 |10/10/2015Write DAX Queries using DAX Studio13 |

14. SUMMARIZE()  Build tables as you need them  SUMMARIZE(, [, ]…[,, ]…)   Any DAX expression that returns a table  A table reference counts   Any column in any table  A column in a related table is a good start ,  Just like ROW(), but now for the context defined above 14 |10/10/2015Write DAX Queries using DAX Studio14 |

15. ADDCOLUMNS()  Add values to a given table  ADDCOLUMNS(,, [,, ]…)   Any DAX expression that returns a table   Same as in ROW()   Any DAX expression that returns a scalar for a given row in the  SUMMARIZE() returns a table… 15 |10/10/2015Write DAX Queries using DAX Studio15 |

16. Best Practice Sidebar  Best Practice to wrap ADDCOLUMNS() around SUMMARIZE()  Reduces unnecessary calculations  Finer control over what is returned  Generally faster  Model dependent of course  Exception is ROLLUP() commands, out of scope for this session 16 |10/10/2015Write DAX Queries using DAX Studio16 |

17. CALCULATETABLE()  Efficient (generally) way to filter a query  CALCULATETABLE(,,,…)   A DAX expression that returns a table   Boolean expression or a table expression that defines a filter 17 |10/10/2015Write DAX Queries using DAX Studio17 |

18. DEFINE MEASURE  Re-usable measures just for your query  DEFINE MEASURE [ ] =   An existing table in the data model   Same as prior slides   A DAX expression that returns a scalar 18 |10/10/2015Write DAX Queries using DAX Studio18 |

19. SUMX()  Turning your query into a measure  SUMX(, )   An existing table in the data model   Same as prior slides   A DAX expression that returns a scalar 19 |10/10/2015Write DAX Queries using DAX Studio19 |

20. Resources  DAX Studio  http://daxstudio.codeplex.com/ http://daxstudio.codeplex.com/  SQLBI.com  Marco and Alberto wrote the book(s) on DAX  DAX function Reference  https://msdn.microsoft.com/en-us/ee634396 https://msdn.microsoft.com/en-us/ee634396  Community  MSDN Forums  https://social.msdn.microsoft.com/Forums/sqlserver/en- US/home?forum=sqlkjpowerpivotforexcel https://social.msdn.microsoft.com/Forums/sqlserver/en- US/home?forum=sqlkjpowerpivotforexcel  Model  https://awinternetsalestabularmodel.codeplex.com/ https://awinternetsalestabularmodel.codeplex.com/ 20 |10/10/2015Write DAX Queries using DAX Studio20 |

21. Questions?  Comments?  Points of Rebuttal? 21 |10/10/2015Write DAX Queries using DAX Studio21 |

22. SQL Saturday Evaluations 10/10/2015Write DAX Queries using DAX Studio22 |  Remember to fill out your online evaluations for the event and any sessions you have attended. They will be online until 10/17/15. http://www.sqlsaturday.com/453/eventeval.aspx http://www.sqlsaturday.com/453/sessions/sessione valuation.aspx