Elite Power Query Interview Guide

Master M-Code, query folding, and high-performance merges with real-time AI logic.

1. What is Query Folding in Power Query?
Query Folding is the ability of Power Query to convert steps written in the UI into a single SQL statement executed on the source database, maximizing performance by shifting heavy loads to the server.
2. What is M Code?
M is the underlying formula language used by Power Query to manipulate data. M stands for Data Mashup. It is a case-sensitive, functional language.

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