Delete SSAS Tabular Partitions with C#

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In: SSAS Tabular
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This post shows how to delete SSAS Tabular partitions with C#. This is an improvement over a PowerShell script I previously wrote about, Delete SSAS Partitions with TMSL and PowerShell, because it is more dynamic and doesn’t require a manually-authored TMSL script. Specifically, the code below deletes all partitions that contain a specified suffix, which is useful for quickly deleting all partitions used for development purposes. I’ve worked with SSAS models that required several development partitions in order to prevent the workspace database from growing too large. Deleting them manually after a deployment to a server would be tedious, and it would be easy to forgetRead More →

Retrieve JSON Data from SQL Server using a Stored Procedure and C#

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In: Data Integration
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The previous post demonstrated how to load JSON into SQL Server using a stored procedure and C#. This post will examine the opposite – how to retrieve JSON data from SQL Server using a stored procedure and C#. Just like with the JSON loading technique, the new JSON functions in SQL Server 2016 allow for this retrieval technique. Here’s how it works in short: Data stored in a database table will be converted to JSON text in the stored procedure and returned to the C# client via an output parameter. SQL Server Table Let’s start with the SQL Server table, which will contain one rowRead More →

Load JSON Into SQL Server Using a Stored Procedure and C#

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This post will demonstrate how to load JSON into SQL Server using a stored procedure and C#. This technique is possible with the new JSON functions starting in SQL Server 2016, and is nice for the following reasons: Simplifies application code. Just serialize the C# objects to JSON and send them to the database. Executing a stored procedure with C# is easily done with a small amount of code. JSON is widely used and familiar to developers. Structural changes to the data could potentially be done entirely on the database side, meaning that you could make changes without having to touch the application code. SQLRead More →

Push Performance Counter Data into a Power BI Streaming Dataset

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In: Power BI, SSAS Tabular
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In the previous post I showed how you can Push Data into Power BI Streaming Datasets with C#. That example used dummy data. In this post I’ll show how to push performance counter data into a Power BI Streaming Dataset as a real world example. This scenario allows for monitoring a computer or application in near real time in the browser. I won’t go through the steps of creating a Power BI Streaming Dataset. You can reference my previous post if you need instructions. I will note that the value names that you choose in the Streaming Dataset must match the C# property names for theRead More →

Power BI Streaming Datasets with C#

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In: Power BI
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This post will demonstrate how to push data into Power BI Streaming Datasets with C#. For demo purposes I normally use LINQPad to run the code, but you could also create a .Net or .Net Core console application. LINQPad is an excellent, lightweight scratchpad for C# and other .Net languages. Power BI Streaming Datasets are a very cool feature because dashboard tiles that use them update in real time. You don’t have to refresh the browser window to display new data. With this feature you can watch your data in near real-time. This could be compelling in scenarios involving sensors, IoT, website traffic, etc. Here isRead More →

Download JSON Data with SSIS

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In: Data Integration
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In a post on the Allegient blog, I showed how you can download JSON data with PowerShell (Link no longer available due to company purchase and reorganization). Now we’ll take a look at how to download JSON data with SSIS. As a dedicated data integration tool, SSIS has many advantages over PowerShell for this type of work. SSIS does not have a built in source component for JSON data, so you’ll have to use the Script Component. When you drag the Script Component into a data flow, you’ll be asked how you want to use it. In this case you’ll use it as a source. DefineRead More →

Call an Azure Function from Power BI

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In: Data Integration, Power BI, Power Query
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This post shows how to call an Azure Function from Power BI. This scenario offers some interesting possibilities, because it allows for integrating the power of several common programming languages with Power BI and Power Query. If you’re not familiar with Azure Functions, it’s a service that allows you to run small pieces of code without having to deal with a server. In this example, we’ll write a query in Power BI that submits a time zone to an Azure Function. The function simply returns the current time in the specified time zone. While this is a very basic example, it is important because itRead More →

Read the Top N Rows from Large Text Files with C#

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In: Data Integration
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This post describes one way that you can read the top N rows from large text files with C#. This is very useful when working with giant files that are too big to open, but you need to view a portion of them to determine the schema, data types, etc. I’ve used PowerShell many times to do this with large csv files, but in this example we’re going to use C# and look at the Wikipedia XML dump of pages and articles. The 3017-03-01 dump is very large and comes in at 59.5 GB. The script is short and simple. All it does is readRead More →

Combine CSV Files without Duplicating Headings using C#

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In: Data Integration
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The simple script below shows how to combine csv files without duplicating headings using C#. This technique assumes that all of the files have the same structure, and that all of them contain a header row. The timings in this post came from combining 8 csv files with 13 columns and a combined total of 9.2 million rows. I first tried combining the files with the PowerShell technique described here. It was painfully slow and took an hour and a half! This is likely because it is deserializing and then serializing every bit of data in the files, which adds a lot of unnecessary overhead. NextRead More →

Query XML on the Web with C# and SSIS

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In: Data Integration
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This post describes how to query XML on the web with C# and SSIS. The emphasis is on the C# code, as I assume the reader is somewhat familiar with the SSIS Script Task. And in order to allow anyone to easily try this example, there is no authentication step. If you’re retrieving XML values from an API, there’s a good chance that you will need to authenticate first. I recently worked on a data integration project where I had to perform two steps involving a REST API in order to download web analytics data. In order to download data in bulk from this API, you firstRead More →