What are the parts of Microsoft self-service business intelligence solution?
Microsoft has two parts for Self-Service BI
Microsoft has two parts for
... [Show More] Self-Service BI
Excel BI Toolkit and Power BI
Excel BI Toolkit
It allows users to create an interactive report by importing data from different sources and model data according to report requirement.
Power BI
It is the online solution that enables you to share the interactive reports and queries that you have created using the Excel BI Toolkit.
What is self-service business intelligence?
SSBI is an approach to data analytics that enables business users to filter, segment, and, analyze their data, without the in-depth technical knowledge in statistical analysis, business intelligence (BI).
SSBI has made it easier for end users to access their data and create various visuals to get better business insights.
Anybody who has a basic understanding of the data can create reports to build intuitive and shareable dashboards.
What is Power BI?
Power BI is a cloud-based data sharing environment. Once you have developed reports using Power Query, Power Pivot and Power View, you can share your insights with your colleagues. This is where Power BI enters the equation. Power BI, which technically is an aspect of SharePoint online, lets you load Excel workbooks into the cloud and share them with a chosen group of co-workers. Not only that, but your colleagues can interact with your reports to apply filters and slicers to highlight data. They are completed by Power BI, a simple way of sharing your analysis and insights from the Microsoft cloud.
What does the Power BI features allow you to do:
Share presentations and queries with your colleagues.
Update your Excel file from data sources that can be on-site or in the cloud.
Display the output on multiple devices. This includes PCs, tablets, and HTML 5-enabled mobile devices that use the Power BI app.
Query your data using natural language processing (or Q&A, as it is known).
What is Power BI Desktop?
is a free desktop application that can be installed right on your own computer. Power BI Desktop works cohesively with the Power BI service by providing advanced data exploration, shaping, modeling, and creating report with highly interactive visualizations. You can save your work to a file or publish your data and reports right to your Power BI site to share with others.
What data sources can Power BI connect to?
Files:
Content Packs:
Connectors
Files: data source in Power BI
Data can be imported from Excel (.xlsx, xlxm), Power BI Desktop files (.pbix) and Comma Separated Value (.csv).
Content Packs: data source in Power BI
It is a collection of related documents or files that are stored as a group. In Power BI, there are two types of content packs, firstly those from services providers like Google Analytics, Marketo or Salesforce and secondly those created and shared by other users in your organization.
Connectors data source in Power BI
to databases and other datasets such as Azure SQL Database, and SQL Server Analysis Services, tabular data, etc.
What are Building Blocks in Power BI?
Visualizations:
Datasets:
Reports:
Dashboards:
Tiles:
Visualizations: The Building Blocks in Power BI
is a visual representation of data.
Example: Pie Chart, Line Graph, Side by Side Bar Charts, Graphical Presentation of the source data on top of Geographical Map, Tree Map, etc.
Datasets: The Building Blocks in Power BI
is a collection of data that Power BI uses to create its visualizations.
Example: Excel sheets, Oracle or SQL server tables.
Reports: The Building Blocks in Power BI
is a collection of visualizations that appear together on one or more pages.
Example: Sales by Country, State, City Report, Logistic Performance report, Profit by Products report etc.
Dashboards: The Building Blocks in Power BI
is single layer presentation of multiple visualizations, i.e we can integrate one or more visualizations into one page layer.
Example: Sales dashboard can have pie charts, geographical maps and bar charts.
Tiles: The Building Blocks in Power BI
is a single visualization in a report or on a dashboard.
Example: Pie Chart in Dashboard or Report.
Visual-level Filters:
These filters work on only an individual visualization, reducing the amount of data that the visualization can see. Moreover, visual-level filters can filter both data and calculations.
Page-level Filters:
These filters work at the report-page level. Different pages in the same report can have different page-level filters.
Report-level Filters:
These filters work on the entire report, filtering all pages and visualizations included in the report.
We know that Power BI visual have interactions feature, which makes filtering a report a breeze. Visual interactions are useful, but they come with some limitations:
TRUE OR FALSE
The filter is not saved as part of the report. Whenever you open a report, you can begin to play with visual filters but there is no way to store the filter in the saved report.
TRUE
TRUE OR FALSE
The filter is not always visible. Sometimes you want a filter for the entire report, but you do not want any visual indication of the filter being applied.
False: The filter is always visible
What are the different types of filters in Power BI Reports?
Power BI provides variety of option to filter report, data and visualization. The following are the list of Filter types.
Visual-level Filters:
Page-level Filters:
Report-level Filters:
What are content packs in Power BI?
for services are pre-built solutions for popular services as part of the Power BI experience. A subscriber to a supported service, can quickly connect to their account from Power BI to see their data through live dashboards and interactive reports that have been pre-built for them. Microsoft has released content packs for popular services such as Salesforce.com, Marketo, Adobe Analytics, Azure Mobile Engagement, CircuitID, comScore Digital Analytix, Quickbooks Online, SQL Sentry and tyGraph.
Organizational content packs provide users, BI professionals, and system integrator the tools to build their own content packs to share purpose-built _____________, _______________, and _______________ within their organization.
dashboards, reports, and datasets
What is DAX?
To do basic calculation and data analysis on data in power pivot, we use Data Analysis Expression (DAX). It is formula language used to compute calculated column and calculated field.
TRUE OR FALSE: DAX works on column values.
TRUE
TRUE OR FALSE: DAX can modify or insert data.
FALSE: DAX can not modify or insert data.
TRUE OR FALSE: We can create calculated column and measures with DAX but we can not calculate rows using DAX.
TRUE
What are the most common DAX Functions used?
SUM, MIN, MAX, AVG, COUNTROWS, DISTINCTCOUNT
IF, AND, OR, SWITCH
ISBLANK, ISFILTERED, ISCROSSFILTERED
VALUES, ALL, FILTER, CALCULATE,
UNION, INTERSECT, EXCEPT, NATURALINNERJOIN, NATURALLEFTEROUTERJOIN,
SUMMARIZECOLUMNS, ISEMPTY,
VAR (Variables)
GEOMEAN, MEDIAN, DATEDIFF
How is the FILTER function used?
The FILTER function returns a table with a filter condition applied for each of its source table rows. The FILTER function is rarely used in isolation, it's generally used as a parameter to other functions such as CALCULATE.
FILTER is an iterator and thus can negatively impact performance over large source tables.
Complex filtering logic can be applied such as referencing a measure in a filter expression.
FILTER(MyTable,[SalesMetric] > 500)
What is special or unique about the CALCULATE and CALCULATETABLE functions?
These are the only functions that allow you modify filter context of measures or tables.
Add to existing filter context of queries.
Override filter context from queries.
Remove existing filter context from queries.
Limitations: Filter parameters can only operate on a single column at a time. (TRUE OR FALSE)
TRUE
Limitations: Filter parameters can reference a metric.(TRUE OR FALSE)
False: Filter parameters cannot reference a metric.
What is the common table function for grouping data?
SUMMARIZE(): Main groupby function in SSAS.
Recommended practice is to specify table and group by columns but not metrics. You can use ADDCOLUMNS function.
SUMMARIZECOLUMNS: New group by function for SSAS and Power BI Desktop; more efficient.
Specify group by columns, table, and expressions.
What are some benefits of using Variables in DAX ?
By declaring and evaluating a variable, the variable can be reused multiple times in a DAX expression, thus avoiding additional queries of the source database.
Variables can make DAX expressions more intuitive/logical to interpret.
Variables are only scoped to their measure or query, they cannot be shared among measures, queries or be defined at the model level.
How would you create trailing X month metrics via DAX against a non-standard calendar?
The solution will involve:
CALCULATE function to control (take over) filter context of measures.
ALL to remove existing filters on the date dimension.
FILTER to identify which rows of the date dimension to use.
Alternatively, CONTAINS may be used:
CALCULATE(FILTER(ALL('DATE'),.......))
What are the different Excel BI add-in?
Below are the most important BI add-in to Excel:
Power Query: It helps in finding, editing and loading external data.
Power Pivot: Its mainly used for data modeling and analysis.
Power View: It is used to design visual and interactively reports.
Power Map: It helps to display insights on 3D Map.
What is Power Pivot?
Power Pivot is an add-in for Microsoft Excel 2010 that enables you to import millions of rows of data from multiple data sources into a single Excel workbook. It lets you create relationships between heterogeneous data, create calculated columns and measures using formulas, build PivotTables and PivotCharts. You can then further analyze the data so that you can make timely business decisions without requiring IT assistance.
What is Power Pivot Data Model?
It is a model that is made up of data types, tables, columns, and table relations. These data tables are typically constructed for holding data for a business entity.
What is xVelocity in-memory analytics engine used in Power Pivot?
The main engine behind power pivot is the xVelocity in-memory analytics engine. It can handle large amount of data because it stores data in columnar databases, and in memory analytics which results in faster processing of data as it loads all data to RAM memory.
What are some of differences in data modeling between Power BI Desktop and Power Pivot for Excel?
Here are some of the differences:
Power BI Desktop supports bi-directional cross filtering relationships, security, calculated tables, and Direct Query options.
Power Pivot for Excel has single direction (one to many) relationships, calculated columns only, and supports import mode only. Security roles cannot be defined in Power Pivot for Excel.
Can we have more than one active relationship between two tables in data model of power pivot?
No, we cannot have more than one active relationship between two tables. However, can have more than one relationship between two tables but there will be only one active relationship and many inactive relationship. The dotted lines are inactive and continuous line are active.
What is Power Query?
Power query is a ETL Tool used to shape, clean and transform data using intuitive interfaces without having to use coding. It helps the user to:
Import Data from wide range of sources from files, databases, big data, social media data, etc.
Join and append data from multiple data sources.
Shape data as per requirement by removing and adding data.
What are the data destinations for Power Queries?
There are two destinations for output we get from power query:
Load to a table in a worksheet.
Load to the Excel Data Model.
What is query folding in Power Query?
Query folding is when steps defined in Power Query/Query Editor are translated into SQL and executed by the source database rather than the client machine. It's important for processing performance and scalability, given limited resources on the client machine.
What are some common Power Query/Editor Transforms?
Changing Data Types, Filtering Rows, Choosing/Removing Columns, Grouping, Splitting a column into multiple columns, Adding new Columns ,etc.
Can SQL and Power Query/Query Editor be used together?
Yes, a SQL statement can be defined as the source of a Power Query/M function for additional processing/logic. This would be a good practice to ensure that an efficient database query is passed to the source and avoid unnecessary processing and complexity
by the client machine and M function.
What are query parameters and Power BI templates?
Query parameters can be used to provide users of a local Power BI Desktop report with a prompt, to specify the values they're interested in.
The parameter selection can then be used by the query and calculations.
PBIX files can be exported as Templates (PBIT files).
Templates contain everything in the PBIX except the data itself.
Parameters and templates can make it possible to share/email smaller template files and limit the amount of data loaded into the local PBIX files, improving processing time and experience .
Which language is used in Power Query?
A new programming language is used in power query called M-Code. It is easy to use and similar to other languages. M-code is case sensitive language.
Why do we need Power Query when Power Pivot can import data from mostly used sources?
Power Query is a self-service ETL (Extract, Transform, Load) tool which runs as an Excel add-in. It allows users to pull data from various sources, manipulate said data into a form that suits their needs and load it into Excel. It is most optimum to use Power Query over Power Pivot as it lets you not only load the data but also manipulate it as per the users needs while loading.
What is Power Map?
Power Map is an Excel add-in that provides you with a powerful set of tools to help you visualize and gain insight into large sets of data that have a geo-coded component. It can help you produce 3D visualizations by plotting upto a million data points in the form of column, heat, and bubble maps on top of a Bing map. If the data is time stamped, it can also produce interactive views that display, how the data changes over space and time.
What are the primary requirement for a table to be used in Power Map?
For a data to be consumed in power map there should be location data like:
Latitude/Longitude pair
Street, City, Country/Region, Zip Code/Postal Code, and State/Province, which can be geolocated by Bing
The primary requirement for the table is that it contains unique rows. It must also contain location data, which can be in the form of a Latitude/Longitude pair, although this is not a requirement. You can use address fields instead, such as Street, City, Country/Region, Zip Code/Postal Code, and State/Province, which can be geolocated by Bing.
What are the data sources for Power Map?
The data can either be present in Excel or could be present externally. To prepare your data, make sure all of the data is in Excel table format, where each row represents a unique record. Your column headings or row headings should contain text instead of actual data, so that Power Map will interpret it correctly when it plots the geographic coordinates. Using meaningful labels also makes value and category fields available to you when you design your tour in the Power Map Tour Editor pane.
To use a table structure which more accurately represents time and geography inside Power Map, include all of the data in the table rows and use descriptive text labels in the column headings, like this:
Example of correct table format - Power BI Interview Questions -Edureka
In case you wish to load your data from an external source:
In Excel, click Data > the connection you want in the Get External Data group.
Follow the steps in the wizard that starts.
On the last step of the wizard, make sure Add this data to the Data Model is checked.
What is Power View?
Power View is a data visualization technology that lets you create interactive charts, graphs, maps, and other visuals which bring your data to life. Power View is available in Excel, SharePoint, SQL Server, and Power BI.
The following pages provide details about different visualizations available in Power View:
Charts
Line charts
Pie charts
Maps
Tiles
Cards
Images
Tables
Power View
Multiples Visualizations
Bubble and scatter charts
Key performance indicators (KPIs)
What is Power BI Designer?
It is a stand alone application wh [Show Less]