Power BI Training for University of Colombo

Conduced a 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗣𝗼𝘄𝗲𝗿 𝗕𝗜 hands-on training program to the students from 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆 𝗼𝗳 𝗖𝗼𝗹𝗼𝗺𝗯𝗼. Taught them how to cleanse and perform an analysis atop raw data within a few minutes using Microsoft Power BI, which is an essential skill set required to pursue nowadays. There were 180+ students who participated in the training.

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Run T-SQL Script Files Using Command Line

Most of the time when we need to execute a SQL script or statement, then we go for SQL Server Management Studio to execute our T-SQL scripts. But the same result we can achieve using Command Prompt. This is very simple way to do that just a matter of write a command and pass few arguments. You can see the process status like as in when you execute a query in Management studio. Use-case : There may be having some situations you won't be able to execute T-SQL script using Management Studio. Most of the time when doing data population. In my case, I had a situation I needed to populate a Database without using backup/restore. Once I generated script with all the schemas and related data it took around 400+Mb sql file. SQL Server Management Studio will not allow you to run the script unless you execute the query in high-end box. Because, when the file loaded to the memory it will too hard to cater our requirement. You may probably get memory ...

How to Create a Date Table in Few Steps Using Power BI

Calendar Dimension or Calendar Table is one of the crucial table in a Power BI model. I never have seen any data warehouse data model which does not have a Calendar table so far in my development. Because, when it comes to data warehousing or dimension modeling you may storing various business processes or events as Facts. So those events anyway occur in particular date or time. So simply there wouldn’t be a Power BI data model without a date table. In this post, I’m going to share with you how to create a date table within few steps. Actually, there are two DAX measures which we can use to create a date table. Calendar(DAX) and CalendarAuto(Auto). Calendar(DAX) = You can pass start date and End date as parameters you need to create date table. CalendarAuto(DAX) = You can use this function without passing any parameter. Then it will generate the dates based on your data model dates. You can simply copy the below DAX code and paste in your Power BI Desktop DAX e...

Value Encoding in Vertipaq Engine

If you can remember my last blog post regarding Vertipaq engine inside SSAS Tabular , I’ve discussed three algorithms which are in use when process the model. Processing in the sense perform data loading from the relational source and load into the tabular structure. In here data compression is taken place in order to save the memory footprint. It is really important because all the data we had in the data warehouse or source relational database after processed the model load into the memory. So by the compression save the huge amount of memory space and it will utilize your hardware optimum way while faster scans because the data model is smaller than the original. These are the steps taking place when we process the tabular model from SSDT or via SQL Server Management Studio. Read the data from the source database and transform into columnar structure or vertipaq data structure while data encoding and compression occurs. Creating of dictionaries and indexes for eac...

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