Most used Power Query concepts and Data modelling in real time

Hi Gopal_PV,

Thank you for reaching out in Microsoft Community Forum.

1. Below are the most used power query tasks;
Remove nulls, unpivot data, merge/append tables, extract values, create parameters/functions.

2.data modeling concepts:
Star schema, relationships, DAX context, calculated columns vs measures, role-playing dimensions

3. Below are the links to learn advance power query concepts;
https://learn.microsoft.com/en-us/power-query/

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Regards,
Pavan.

Most Common Power Query Requirements in Interviews are:
Data Transformation Basics => Importing data from different sources (Excel, CSV, databases, web, PDFs) / Cleaning data: removing duplicates, filtering rows, replacing values/ Changing data types properly

Advanced Power Query Skills => M language basics and writing custom functions / Parameterizing queries for dynamic filtering/ Combining data: merging and appending tables with different structures/ Handling errors and missing data (using try...otherwise, Table.HasErrors, etc.) / Grouping data and aggregation in Power Query (Table.Group) / Using List and Record functions for advanced transformations / Working with dates and text transformations / Optimizing query performance with buffering (Table.Buffer) and query folding awareness