PowerBI – Online Query


This is quite a late post for a presentation that was done in September. But as they say, better late than never! During the September Bangalore UG meeting, I had presented on PowerBI, Power Query, Power Map and Online Search to be specific! In this post, I shall talk specifically about Online Search using Power Query.

Online Search is an option available in the Power Query tab (screenshot 1) in Excel. Online Search allows you to search public datasets to import data from a large collection of public data sources. Displays the Online Search pane so you can search for public data from Wikipedia. Search results list items that contain the search term anywhere in the title, description, or key words.

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imageWhen you click on the Online Search button, you will be present with a search column which allows you to search for data sets online. Before you can do that, you will need to sign in using an account which can utilize PowerBI features. For this blog post, I will be using the Online Search to create a trending chart for Microsoft (MSFT) stock prices.

I used the search string “MSFT Stock” which gave me a list of stock quotes available online. You will be presented with two sets of data:

a. From your organization if you have signed in using your Organizational Account and if someone from your organization has shared dataset pertaining to your search string

b. Publicly available datasets which match your search string

The mouse over on the data set (Screenshot 2) will show you multiple things like a sample view of the data, the columns and the data source details.

If you think that the data set is good to use, you can use the Load drop-down option to load the data into a data model or into an Excel sheet (See Screenshot 3).

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Once you have loaded the data as per your choice, you can cleanse and transform your data using Power Query – Query Editor (see Screenshot 4). Once you have created the necessary transformations, you can create pivot charts and pivot tables using the data. The finished product is shown in Screenshot 5.

I had used a Time dimension from the Azure marketplace to prepare my X-axis that you see in the graphs. How that was done is a topic for another post. Once I had all the relationships built, I was able to build the visualizations shown below. All this took me less than 15 minutes! Smile It is that quick provided you have a decent net connection.

Now here is the awesome part. Going to Data -> Refresh, you can refresh all your data and get the latest view without having to re-design anything again. So this is all ready to be published or shared with anyone you want without worrying if they know how to use Power Query or not!

The Excel file is available on One Drive as well.

As you can see from this post, it is quite easy to create visualizations which provide vital insights using Excel 2013 and Power Query within minutes! Look forward to posts in the future on this topic.

 

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References:

Power Query Ribbon
http://office.microsoft.com/en-ca/excel-help/guide-to-the-power-query-ribbon-HA103993930.aspx

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WOOT: Schema Changes History Report on Power View


The last post in this series talked about using Power View to analyze the data stored in the SQL Server’s default trace. I decided to take this a step further by creating the Schema Changes History report with the help of the data that I retrieved from the Default Traces. The advantage of a report created in Power View is that the interactivity which is missing in the standard report is available.

The way I created this report was to filter the data in the Power Pivot table using EventClass ID 46, 47 and 164 for only looking at the create, drop and alter commands which the default trace tracks. After that I created a table with a tile on the Database Name and a 100% Stacked Bar Chart to show the activity at a database level.

I also had to create linked tables for getting the Object Type and the Event Class Name that you see in the table below.

I will provide a final version of the Excel sheet once I have completed the other dashboards and sanitized the information available in the Power Pivot table.

SchemaChangesHistory

Previous Post in the Series:

Default Trace Dashboard
https://troubleshootingsql.com/2013/09/26/woot-default-trace-and-power-view/

WOOT: Default Trace and Power View


I have been working on building visualizations for various kinds of analysis that I perform for my customers. One such useful visualization was the use of Power View for analyzing the data available in the SQL Server Default Trace. The query below lets you retrieve all the information in the default traces. This same query is used to populate the Power Pivot table in the Excel file.


declare @enable int

-- Check to find out if Default Server Side traces are running
select top 1 @enable = convert(int,value_in_use) from sys.configurations where name = 'default trace enabled'

if @enable = 1 --default trace is enabled
begin

declare @d1 datetime;
declare @diff int;
declare @curr_tracefilename varchar(500);
declare @base_tracefilename varchar(500);
declare @indx int ;

select @curr_tracefilename = path from sys.traces where is_default = 1 ;

set @curr_tracefilename = reverse(@curr_tracefilename)
select @indx = PATINDEX('%\%', @curr_tracefilename)
set @curr_tracefilename = reverse(@curr_tracefilename)
set @base_tracefilename = LEFT( @curr_tracefilename,len(@curr_tracefilename) - @indx) + '\log.trc';

select EventCat.name as Category, EventID.name as EventName, Events.*
from ::fn_trace_gettable( @base_tracefilename, default ) Events
inner join sys.trace_events EventID
on Events.EventClass = EventID.trace_event_id
inner join sys.trace_categories EventCat
on EventID.category_id = EventCat.category_id

end

Once I have all the trace data available in my Power Pivot table, I created calculated columns for Day, Hour and Minute. Now that I have all the data readily available for me, I went about creating the main dashboard which provides a view of all the events that occurred along with a time line view. All this took me less than 5 minutes after I had finished writing the query! Pretty quick. Now I have an interactive report that I can use for performing various kinds of analysis.

The screenshot below will show that there was only one event raised for the Server event category and the actual time of occurrence is shown in the line graph. A simple mouse over on the point will give you the exact details. Now isn’t that a simple way to track down events! Smile

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I will provide a final version of the Excel sheet once I have completed the other dashboards and sanitized the information available in the Power Pivot table.