Tag Archives: database

PowerBI DAX – VAR

By | June 16, 2020

A very useful way to work with DAX functions is to use VAR. VAR is a form of variable in which results can be stored temporarily without having to create measures and then using them in others. For example you use Var to store the result of a particular group and then use the var… Read More »

PowerBI DAX- USERNAME

By | June 16, 2020

This is a function that may not be used as frequently as it used to be but it is likely you will encounter it in older PowerBI Reports where RLS or row level security was implemented. The function returns the username of the user currently viewing the report. Using this information and mapping it against… Read More »

PowerBI DAX – USERELATIONSHIP

By | June 16, 2020

A common issue faced when working with PowerBI is the limitation of having only one Active relationship between two tables. While this is a not an issues when importing data it can make creating measures a hassle. An example of this scenario could be the use of calendar table for Order Date and Delivery Date.… Read More »

PowerBI DAX- TREATAS

By | June 16, 2020

Once we are able to create virtual tables within PowerBI using Functions such as EVALUATE , CALCULATE TABLE etc it might be required to filter the contents of the virtual table based on certain Input criteria. In such cases we can use the TREATAS function to apply filters to a Virtual or Actual Table as… Read More »

PowerBI DAX- TOTALYTD

By | June 16, 2020

A very useful kind of report is called a cumulative report. Which is based on summarizing data cumulatively. This means we can see the area chart as progressively growing as the year goes by. Charts such as these provide a clear indication of the long term trajectory of the sales and clearly indicates Sales for… Read More »

PowerBI DAX – TOPN

By | June 16, 2020

Another commonly used function is the TOPN function. It is used for both TOP and BOTTOM use cases. In this example to demonstrate the basics we are first going to simply fetch the top 34employees by their employee key. The below Formula shows what this would look like Table = TOPN(4,ALL(‘Dimension Employee’),’Dimension Employee'[Employee Key],ASC) To… Read More »

PowerBI DAX – SWITCH

By | June 16, 2020

Switch is a DAX function that is used frequently to create custom groups and classifications. In this example we use Switch to create a column called approval where we code different types of approval for the total sum of Amount. You can use switch to replace multiple values with another value instead of using IF… Read More »

PowerBI DAX – SUMMARIZE

By | June 16, 2020

A useful function when measures need to be created on top of summarized data the SUMAMRIZE Function as its name suggests returns a table containing aggregates based on some grouping. In this example we can see a Table created which summarizes the SaleAmount from the Transactions Table Grouped by the year and the CustomerKey. Basically… Read More »

PowerBI DAX – SUM and SUMX

By | June 16, 2020

In this post we cover the difference between the DAX Formula SUM and SUMX. If you are even somewhat familiar with EXCEL you already know what SUM does. SUM aggregates the values over a column taking all rows into account. SUMX performs the same aggregate operation but over a subset of the data. Basically when… Read More »

PowerBI DAX- SUBSTITUTE

By | June 16, 2020

The DAX Function SUBSTITUTE can be treated like the Replace function in MSSQL Server. It replaces a string with another string. Its syntax is also similar to the syntax of the Replace function in SQL Server. If we look at the example from the previous post we can see that CONCATENATE has resulted in the… Read More »