Modern .xlsx files are actually compressed ZIP archives containing multiple XML files. This format is safer than older versions because it cannot natively store malicious VBA macros.
A single worksheet in an .xlsx file can hold up to 1,048,576 rows and 16,384 columns . Since this file is labeled "1M," it likely pushes the software to its near-maximum row capacity. 41815_1M_File2.xlsx
Practicing advanced Excel techniques like Power Query , Pivot Tables , and large-scale data cleaning. Key Technical Aspects of .xlsx Files Modern
The file appears to be a large-scale Microsoft Excel dataset, likely part of a series (indicated by "File2") containing approximately 1 million rows of data (denoted by "1M"). 576 rows and 16
Simulating high-volume data imports into SQL or other database management systems.