Real-world BISM in SQL Server 2012 SSAS

Real-Wor ld SQL Ser ver 2012Analysis Ser vices BISMmodels Lynn Langit Data Wrangler Level: Intermediate

Agenda – About the BI Semantic Model

Better BI => Better Reporting

Better BI => New Storage/Query/Display

What is the BISM?

SQL Server Analysis Services Modes• UDM (Multidimensional / Data Mining) – Also called OLAP cubes• BISM (Tabular) – Business Intelligence Semantic Model• PowerPivot for SharePoint

Why Use BISM?• Quick and simple to set up (flexible model) – Fast – in memory by default w/Vertipaq – Connects to many types of data - flexible – Overcomes the limits of PowerPivot – Granular (role-based) security model• Integrates with PowerView (data source in SPS)

How to get started with xVelocity

Data Sources for BISM

External Data - Markets• Windows Azure Marketplace• DataMarket.com• Factual.com• Freebase.com

When to use the BISM?

How to Create / View models for BISM?• Design in SSDT (or import from PowerPivot)• Open in Excel, SharePoint or PowerView• Can be used as data sources for SSRS in SharePoint….

DemoCreating a Modelin Power Pivot

Parts of BISM • Tabular Model Project in SSDT • New or Import • BISM – new or from PowerPivot via Excel • Workspace Database (in memory by default) • Views in BISM • Data & Calculation • Diagram • Toolbars—create KPI, etc… • Perspectives are supported as well

DemoEnhancing the model

Enhancing Models• Sort or Filter Table data• Add Relationships (diagram view)• Add Hierarchies (diagram view)• Adding Calculated Columns via DAX• Adding Measures and KPIs via DAX• Improving Usability for clients

Diagram View of BISM in SSDT• Manage Relationships• Create Hierarchies

What is DAX - Data Analysis Expressions• Data-expression Query Language (Excel-like simplified version of MDX• Over 170 functions (64 functions for aggregation)• Ability to reference data in other tables in the model (sumx, averagex, related [many-to-one], relatedtable [one-to-many] etc…)

When to Use DAX with BISM modeling

How to use DAX with BISM modeling• Define formula & Add to model• DAX query language & query plans in 2012 – Uses ‘Evaluate’• Samples – = SalesTable [SalesTotalColumn] – SalesTable [SalesCostColumn] – = FORMAT (SalesTable [SalesDate], “MMM”) – = RELATED (DimCustomerSales[SalesAmount]) – RELATED (DimCustomerCosts[SalesCost]) Relationship must be defined between tables when using RELATED

Enhancing the Model – Advanced View

Enhancing the Model – Advanced View 2 • Set the Table Behavior – Row ID – Uniqueness – Default Label – Default Image

Tips for creating usable models• Create Hierarchies• Hide unneeded columns from client tools• Rename columns to natural language• Add relations or Add perspectives• Format data in the model, i.e. percentages…• Use DAX to remove nulls / errors• Use a TimeTable – Can use ‘mark as date table’ – Cam create a separate date table

Complex DAX example

Understanding DAX in Profiler

DemoAdding DAXto a BISM model

Creating BI projects using SSDT

BISM Models and Excel• Can be created in Excel (and imported into SSDT)• Can be viewed in Excel (PivotTables) while modeling in SSDT

DemoCreating a BISM Model forSSAS usingSQL Server Data Tools(SSDT)

BISM Normalizer = DiffTool for BISM3rd party tool, from CodePlex - here

Adding Security Roles• Map groups to BISM roles

Understanding BISM structures

Deployment of BISM in SSDT to SSAS• Query Mode default is ‘In-Memory’• Default Cube Name is Model.bim

About Query Modes• InMemory is the default• Query Mode (SSDT) / Direct Query Mode (SSMS)• Direct Query mode can use Columnstore indexes• Direct Query mode supports only a single data source• Not all DAX functions work in Direct Query mode

SSAS Server Settings for Tabular Mode

DemoDeploying a BISMModel to SSASusing SSDT

Connecting to a deployed BISM model• Administration in SSMS• View in Client – Excel / PowerPivot – SharePoint PowerView – Other clients

Connect in SSMS

DAX or MDX?• MDX issuing clients (Excel) can – talk to both multidimensional models and tabular models running in VertiPaq (in-memory) mode• MDX cannot – be used to talk to DirectQuery models• DAX issuing clients (Power View) can – talk to tabular models (both kinds - VertiPaq and DirectQuery)• DAX cannot – be used to talk to multidimensional models. This functionality is on the roadmap, but will not be present at RTM

Updating the data• Can update subsets using partitions• Can monitor update process via Profiler

Monitoring Resource Usage• Can use Profiler• Extended Events for monitoring• Can use DMVs• SSAS Operations Guide

Tips, Tricks & Gotchas• Installation • SSAS in either Tabular –or- UDM mode • Needs prerequisites• Development • One BISM model per project • Prefer DAX, not MDX • Try it out in Excel while developing in SSDT• Deployment • Use partitions for granular updating • Monitor via Profiler – plan for up to ½ data size in server memory

Other Tools• Cmdlets on CodePlex – here• Klout case study whitepaper - here• DAX studio/ intellisense - here

What about the UDM?• UDM / Data Mining is fully supported in SSAS• Must be installed in this mode – Mutually exclusive to Tabular mode• But, should you use it anymore?

Resources• SSAS Team Blog – here• About DAX – MVP blog – here• SQL 2012 tutorial - here• Codeplex samples – here• Klout case study whitepaper - here

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Toward Data Craftsmanship…

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Real-world BISM in SQL Server 2012 SSAS

by Lynn Langit on Dec 12, 2012

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Real-world BISM in SQL Server 2012 SSAS Presentation Transcript